--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/epoc32/include/arp_hdr.h	Tue Mar 16 16:12:26 2010 +0000
@@ -0,0 +1,190 @@
+// 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 the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members
+// which accompanies this distribution, and is available
+// at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// arp_hdr.h - ARP header structure
+// ARP header structure.
+//
+
+
+
+/**
+ @file arp_hdr.h
+ @ingroup ip_packet_formats
+ @publishedAll
+ @released
+*/
+
+#ifndef __ARP_HDR_H__
+#define __ARP_HDR_H__
+
+#include "in_hdr.h"
+
+/**
+* @addtogroup  ip_packet_formats
+* @{
+*/
+
+/**
+* "Fake" protocol number for ARP.
+*
+* This protocol value is only used to recognize the ARP packets
+* coming from the interface. There is no "real" ARP.PRT.
+*/
+const TUint KProtocolArp		= 0xFAD;	// (get some better value)
+
+const TUint16 KArpProtocolType_IP = 0x0800;	// Protocol Type value for IPv4
+//
+// Hardware types listed only as example, it is assumed that the
+// driver knows its own type...
+//
+const TUint16 KArpHarwareType_ETHERNET = 1;
+const TUint16 KArpHarwareType_IEEE_802 = 6;
+
+/**
+@publishedAll
+@released
+*/
+enum TArpOperation	// from RFC-1700
+	{
+	EArpOperation_REQUEST = 1,			// RFC-826
+	EArpOperation_REPLY = 2,			// RFC-826
+	EArpOperation_REQUEST_REVERSE = 3,	// RFC-903
+	EArpOperation_REPLY_REVERSE = 4,	// RFC-903
+	EArpOperation_DRARP_REQUEST = 5,	//
+	EArpOperation_DRARP_REPLY = 6,
+	EArpOperation_DRARP_ERROR = 7,
+	EArpOperation_INARP_REQUEST = 8,	// RFC-1293
+	EArpOperation_INARP_REPLY = 9,		// RFC-1293
+	EArpOperation_ARP_NAK = 10
+	};
+
+
+class TInet6HeaderArp
+	/**
+	* ARP Header.
+	*
+@verbatim
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ |        Hardware Type          |         Protocol Type         |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ |  HwAddrLen    |   PrAddrLen   |         ARP Operation         |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ |         Sender's physical hardware address                    |
+   - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+ |         Sender's protocol address                             |
+   - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+ |         Target's physical hardware address                    |
+   - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+ |         Target's protocol address                             |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+@endverbatim
+	* @note
+	* This definition covers only the fixed portion of the
+	* message. DO NOT DECLARE A VARIABLE WITH THIS CLASS!
+	* @publishedAll
+	* @released
+	*/
+	{
+public:
+	inline static TInt MinHeaderLength() {return 8; }
+	inline static TInt MaxHeaderLength() {return 128; }	
+
+	inline TUint8* EndPtr() { return i + HeaderLength(); }
+	inline TInt HeaderLength() const { return 8 + 2 * HwAddrLen() + 2 * PrAddrLen(); } // Return true byte length
+
+	// Access methods
+
+	inline TInt HardwareType() const	// Return hardware type value in host order
+		{
+		return i[0] << 8 | i[1];
+		}
+
+	inline TInt ProtocolType() const	// Return protocol type value in host order
+		{
+		return i[2] << 8 | i[3];
+		}
+
+	inline TInt HwAddrLen()	const		// Return hardware address length (in bytes)
+		{
+		return i[4];
+		}
+
+	inline TInt PrAddrLen()	const		// Return protocol address length (in bytes)
+		{
+		return i[5];
+		}
+
+	inline TInt Operation() const
+		{
+		return i[6] << 8 | i[7];
+		}
+
+	// Access/Modify
+
+	inline TPtr8 SenderHwAddr()
+		{
+		return TPtr8(&i[8], HwAddrLen(), HwAddrLen());
+		}
+	inline TPtr8 SenderPrAddr()
+		{
+		return TPtr8(&i[8] + HwAddrLen(), PrAddrLen(), PrAddrLen());
+		}
+	inline TPtr8 TargetHwAddr()
+		{
+		return TPtr8(&i[8] + HwAddrLen() + PrAddrLen(), HwAddrLen(), HwAddrLen());
+		}
+	inline TPtr8 TargetPrAddr()
+		{
+		return TPtr8(&i[8] + 2*HwAddrLen() + PrAddrLen(), PrAddrLen(), PrAddrLen());
+		}
+
+	// Modify
+
+	inline void SetHardwareType(TInt aType)	// Set hardware type value
+		{
+		i[1] = (TUint8)aType;
+		i[0] = (TUint8)(aType >> 8);
+		}
+
+	inline void SetProtocolType(TInt aType)	// Set protocol type value
+		{
+		i[3] = (TUint8)aType;
+		i[2] = (TUint8)(aType >> 8);
+		}
+
+	inline void SetHwAddrLen(TInt aLength)	// Set hardware address length (in bytes)
+		{
+		i[4] = (TUint8)aLength;
+		}
+
+	inline void SetPrAddrLen(TInt aLength)	// Set protocol address length (in bytes)
+		{
+		i[5] = (TUint8)aLength;
+		}
+
+	inline void SetOperation(TInt aOperation)
+		{
+		i[7] = (TUint8)aOperation;
+		i[6] = (TUint8)(aOperation >> 8);
+		}
+
+private:
+	union
+		{
+		TUint8 i[8];
+		TUint32 iAlign;	// A dummy member to force the 4 byte alignment
+		};
+	};
+
+/** @} */
+#endif