--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/networkprotocols/tcpipv4v6prt/inc/in_net.h	Tue Jan 26 15:23:49 2010 +0200
@@ -0,0 +1,94 @@
+// Copyright (c) 2004-2009 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:
+// in_net.h - network layer protocol
+//
+
+
+
+/**
+ @internalComponent
+*/
+#ifndef __IN_NET_H__
+#define __IN_NET_H__
+
+#include "inet.h"
+
+const TUint KNetDefaultRecvBuf =  8192;  // Default receive buffer limit for SAP's (ICMP & IP)
+
+//
+// This is not a good class. It is misnamed. -- msa
+// It is used by IP and ICMP, mainly for
+// its Async buffer queues, i really would need something different..
+//
+class CProtocolInet6Network : public CProtocolInet6Base
+	{
+	//
+	// Generic
+	//
+public:
+	virtual ~CProtocolInet6Network();
+	virtual void StartL();
+
+	inline TInt QueueLimit() { return iQueueLimit; }
+protected:
+	//
+	// The initial buffer limit for SAP's receive queues
+	// created under this protocol (see. iQueueLimit on
+	// CProviderInet6Network for interpretation).
+	TInt iQueueLimit;
+
+	virtual void Deliver(/*const*/ RMBufPacketBase &aPacket);
+	};
+
+
+class CProviderInet6Network : public CProviderInet6Base
+	{
+public:
+	CProviderInet6Network(CProtocolInet6Base *aProtocol) : CProviderInet6Base(aProtocol) {}
+	virtual ~CProviderInet6Network();
+	virtual void InitL();
+	virtual void Shutdown(TCloseType option);
+	virtual void Process(RMBufChain& aPacket, CProtocolBase *aSourceProtocol = NULL);
+	virtual void GetData(TDes8 &aDesc, TUint options, TSockAddr *anAddr=NULL);
+	virtual TInt GetData(RMBufChain& aData, TUint aLength, TUint aOptions, TSockAddr* anAddr=NULL);
+	virtual TInt SetLocalName(TSockAddr &anAddr);
+	virtual void AutoBind();
+
+	// IsReceiving is intended for the protocol side. It is can be used by
+	// the protocol side "Deliver" method to ask if this SAP is willing to
+	// receive packets associated with the specified id. What the "id" is,
+	// depends on the protocol. For, example, for IP level SAP/PRT pair, the
+	// id is the protocol of the received packet (e.g. protocol or next header
+	// field from the IP header).
+	virtual TBool IsReceiving(const RMBufPktInfo &aInfo);
+protected:
+	RMBufPktQ iRecvQ;
+	//
+	// iQueueLimit is used to control how much buffered data is allowed
+	// to be in the iRecvQ, before "congestion" control hits. The value counts
+	// bytes in iRecvQ in following way
+	// - if iQueueLimit < 0, then incoming packet is dropped (= "congestion")
+	// - if iQueueLimit >= 0, then incoming packet is added into iRecvQ, and
+	//   the length of the packet is subtracted from the iQueueLimit. When
+	//   GetData removes the packet from the queue, the length is added back
+	//   to iQueueLimit.
+	// Thus, if left as initial value (= 0), only one packet at time can be
+	// queued. If initialized to 8000, then at most 8000 bytes and 1 packet
+	// can be queued at any point.
+	TInt iQueueLimit;
+	TInt iPacketsDropped;	// Count packets dropped due "congestion"
+	TUint iInputStopped:1;
+	};
+
+#endif