// $Id: IGMPFields.java,v 1.1 2001/07/30 00:00:02 pcharles Exp $ /// <summary>************************************************************************ /// Copyright (C) 2001, Patrick Charles and Jonas Lehmann * /// Distributed under the Mozilla Public License * /// http://www.mozilla.org/NPL/MPL-1.1.txt * /// ************************************************************************* /// </summary> namespace Tamir.IPLib.Packets { using System; /// <summary> IGMP protocol field encoding information. /// * /// </summary> /// <author> Patrick Charles and Jonas Lehmann /// </author> /// <version> $Revision: 1.1 $ /// @lastModifiedBy $Author: pcharles $ /// @lastModifiedAt $Date: 2001/07/30 00:00:02 $ /// /// </version> public struct IGMPFields{ // field lengths /// <summary> Length of the IGMP message type code in bytes.</summary> public readonly static int IGMP_CODE_LEN = 1; /// <summary> Length of the IGMP max response code in bytes.</summary> public readonly static int IGMP_MRSP_LEN = 1; /// <summary> Length of the IGMP header checksum in bytes.</summary> public readonly static int IGMP_CSUM_LEN = 2; /// <summary> Length of group address in bytes.</summary> public readonly static int IGMP_GADDR_LEN; // field positions /// <summary> Position of the IGMP message type.</summary> public readonly static int IGMP_CODE_POS = 0; /// <summary> Position of the IGMP max response code.</summary> public readonly static int IGMP_MRSP_POS; /// <summary> Position of the IGMP header checksum.</summary> public readonly static int IGMP_CSUM_POS; /// <summary> Position of the IGMP group address.</summary> public readonly static int IGMP_GADDR_POS; // complete header length /// <summary> Length in bytes of an IGMP header.</summary> // 8 public readonly static int IGMP_HEADER_LEN; static IGMPFields() { IGMP_GADDR_LEN = IPAddress.WIDTH; IGMP_MRSP_POS = Tamir.IPLib.Packets.IGMPFields.IGMP_CODE_POS + Tamir.IPLib.Packets.IGMPFields.IGMP_CODE_LEN; IGMP_CSUM_POS = Tamir.IPLib.Packets.IGMPFields.IGMP_MRSP_POS + Tamir.IPLib.Packets.IGMPFields.IGMP_MRSP_LEN; IGMP_GADDR_POS = Tamir.IPLib.Packets.IGMPFields.IGMP_CSUM_POS + Tamir.IPLib.Packets.IGMPFields.IGMP_CSUM_LEN; IGMP_HEADER_LEN = Tamir.IPLib.Packets.IGMPFields.IGMP_GADDR_POS + Tamir.IPLib.Packets.IGMPFields.IGMP_GADDR_LEN; } } }
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