54 lines
2.4 KiB
C#
54 lines
2.4 KiB
C#
/*
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This file is part of PacketDotNet
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PacketDotNet is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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PacketDotNet is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PacketDotNet. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Copyright 2009 Chris Morgan <chmorgan@gmail.com>
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*/
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namespace PacketDotNet
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{
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/// <summary> IGMP protocol field encoding information. </summary>
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public class IGMPv2Fields
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{
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/// <summary> Length of the IGMP message type code in bytes.</summary>
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public readonly static int TypeLength = 1;
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/// <summary> Length of the IGMP max response code in bytes.</summary>
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public readonly static int MaxResponseTimeLength = 1;
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/// <summary> Length of the IGMP header checksum in bytes.</summary>
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public readonly static int ChecksumLength = 2;
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/// <summary> Length of group address in bytes.</summary>
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public readonly static int GroupAddressLength;
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/// <summary> Position of the IGMP message type.</summary>
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public readonly static int TypePosition = 0;
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/// <summary> Position of the IGMP max response code.</summary>
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public readonly static int MaxResponseTimePosition;
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/// <summary> Position of the IGMP header checksum.</summary>
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public readonly static int ChecksumPosition;
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/// <summary> Position of the IGMP group address.</summary>
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public readonly static int GroupAddressPosition;
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/// <summary> Length in bytes of an IGMP header.</summary>
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public readonly static int HeaderLength; // 8
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static IGMPv2Fields()
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{
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GroupAddressLength = IPv4Fields.AddressLength;
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MaxResponseTimePosition = TypePosition + TypeLength;
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ChecksumPosition = MaxResponseTimePosition + MaxResponseTimeLength;
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GroupAddressPosition = ChecksumPosition + ChecksumLength;
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HeaderLength = GroupAddressPosition + GroupAddressLength;
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}
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}
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}
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