williamr@2: // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
williamr@2: // All rights reserved.
williamr@2: // This component and the accompanying materials are made available
williamr@2: // 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
williamr@2: // which accompanies this distribution, and is available
williamr@2: // at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".
williamr@2: //
williamr@2: // Initial Contributors:
williamr@2: // Nokia Corporation - initial contribution.
williamr@2: //
williamr@2: // Contributors:
williamr@2: //
williamr@2: // Description:
williamr@2: // udp_hdr.h - UDP header structure
williamr@2: // Defines the basic classes for accessing the header
williamr@2: // structures within UDP packets.
williamr@2: //
williamr@2: 
williamr@2: 
williamr@2: 
williamr@2: /**
williamr@2:  @file udp_hdr.h
williamr@2:  @ingroup ip_packet_formats
williamr@2:  @publishedAll
williamr@2:  @released
williamr@2: */
williamr@2: 
williamr@2: #ifndef __UDP_HDR_H__
williamr@2: #define __UDP_HDR_H__
williamr@2: 
williamr@2: #include <e32def.h>
williamr@2: #include "in_hdr.h"
williamr@2: 
williamr@2: /**
williamr@2: * @addtogroup ip_packet_formats
williamr@2: * @{
williamr@2: */
williamr@2: 
williamr@2: // TInet6HeaderUPD
williamr@2: 
williamr@2: class TInet6HeaderUDP
williamr@2: 	/** UDP Header format.
williamr@2:     * User Datagram Header Format
williamr@2: 	* @verbatim
williamr@2: Extract from RFC-768
williamr@2:                                     
williamr@2:      0      7 8     15 16    23 24    31  
williamr@2:     +--------+--------+--------+--------+ 
williamr@2:     |     Source      |   Destination   | 
williamr@2:     |      Port       |      Port       | 
williamr@2:     +--------+--------+--------+--------+ 
williamr@2:     |                 |                 | 
williamr@2:     |     Length      |    Checksum     | 
williamr@2:     +--------+--------+--------+--------+ 
williamr@2:     |                                     
williamr@2:     |          data octets ...            
williamr@2:     +---------------- ...                 
williamr@2: @endverbatim
williamr@2: 	* @publishedAll
williamr@2: 	* @released
williamr@2: 	*/
williamr@2: 	{
williamr@2: public:
williamr@2: 	inline TInt HeaderLength() const {return 8;}
williamr@2: 	inline static TInt MinHeaderLength() {return 8; }
williamr@2: 	inline static TInt MaxHeaderLength() {return 8; }
williamr@2: 	inline TUint8 *EndPtr() {return i + HeaderLength();}
williamr@2: 	//
williamr@2: 	// Access, Get UDP field values from the packet
williamr@2: 	//
williamr@2: 	inline TUint SrcPort() const
williamr@2: 		{
williamr@2: 		return (i[0] << 8) + i[1];
williamr@2: 		}
williamr@2: 	inline TUint DstPort() const
williamr@2: 		{
williamr@2: 		return (i[2] << 8) + i[3];
williamr@2: 		}
williamr@2: 	inline TInt Length() const
williamr@2: 		{
williamr@2: 		return (i[4] << 8) + i[5];
williamr@2: 		}
williamr@2: 	inline TInt Checksum() const
williamr@2: 		{
williamr@2: 		// Checksum is used in network byte order
williamr@2: 		return *((TUint16 *)&i[6]);
williamr@2: 		}
williamr@2: 	//
williamr@2: 	// Build, Set UDP field value to the packet
williamr@2: 	//
williamr@2: 	inline void SetSrcPort(TUint aPort)
williamr@2: 		{
williamr@2: 		i[0] = (TUint8)(aPort >> 8);
williamr@2: 		i[1] = (TUint8)aPort;
williamr@2: 		}
williamr@2: 	inline void SetDstPort(TUint aPort)
williamr@2: 		{
williamr@2: 		i[2] = (TUint8)(aPort >> 8);
williamr@2: 		i[3] = (TUint8)aPort;
williamr@2: 		}
williamr@2: 	inline void SetLength(TInt aLength)
williamr@2: 		{
williamr@2: 		i[4] = (TUint8)(aLength / 256);
williamr@2: 		i[5] = (TUint8) aLength;
williamr@2: 		}
williamr@2: 	inline void SetChecksum(TInt aSum)
williamr@2: 		{
williamr@2: 		// Checksum is used in network byte order
williamr@2: 		*((TUint16 *)&i[6]) = (TUint16)aSum;
williamr@2: 		}
williamr@2: private:
williamr@2: 	TUint8 i[8];
williamr@2: 	};
williamr@2: /** @} */
williamr@2: #endif