--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/networkprotocols/iphook/inhook6example/src/exain.cpp	Tue Jan 26 15:23:49 2010 +0200
@@ -0,0 +1,73 @@
+// 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:
+// exain.cpp - Inbound plugin example module
+//
+
+#include "exain.h"
+
+#pragma warning (disable:4100)
+
+//
+// Applies all the modifications needed for every incoming ICMP packet
+//
+TInt CProtocolExain::ApplyL(RMBufHookPacket& /*aPacket*/, RMBufRecvInfo& aInfo)
+	/**
+	* An IPv4 ICMP header detected.
+	*
+	* This example returns always KIp6Hook_PASS without modifying
+	* the packet in any way. There is some template if statements
+	* which demonstrate the major paths that would need to be taken,
+	* if any real processing was to happen.
+	*/
+	{
+/** @code */
+	if (aInfo.iProtocol != (TInt)KProtocolInetIcmp)
+		{
+		// If the CProtocolExain::NetworkAttached only bound the hook for
+		// IPv4 ICMP, we should never get here...
+		return KIp6Hook_PASS;
+		}
+
+	if (aInfo.iIcmp != 0)
+		{
+		// The ICMPv4 header is in the returned packet of some ICMP error  packet.
+		//
+		// aInfo.iOffset
+		//	offset to the relevant ICMPv4 header
+		// aInfo.iOffsetIp
+		//	indicates position of the IP header of the returned packet.
+		// aInfo.iSrcAddr
+		//	is the source address of the returned packet (should be my own address)
+		// aInfo.iDstAddr
+		//	is the destination address of the returned packet
+		return KIp6Hook_PASS;
+		}
+
+	// The incoming packet is ICMPv4 addressed to this node.
+	//
+	// aInfo.iOffset
+	//	offset to the relevant ICMPv4 header
+	// aInfo.iOffsetIp
+	//	indicates position of the IP header before this ICMPv4 header
+	//	(usually zero).
+	// aInfo.iSrcAddr
+	//	is the source address of the packet
+	// aInfo.iDstAddr
+	//	is the destination address of the packet (should be my own
+	//	address, or some type of multicast/broadcast address).
+	return KIp6Hook_PASS;
+/** @endcode */
+	}
+
+#pragma warning (default:4100)