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LinuxSllFields.cs
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LinuxSllFields.cs
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/*
This file is part of PacketDotNet
PacketDotNet is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
PacketDotNet is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PacketDotNet. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Copyright 2009 Chris Morgan <[email protected]>
*/
namespace PacketDotNet
{
/// <summary>
/// Lengths and offsets to the fields in the LinuxSll packet
/// See http://github.com/mcr/libpcap/blob/master/pcap/sll.h
/// </summary>
public struct LinuxSllFields
{
/// <summary>
/// Length of the ethernet protocol field
/// </summary>
public static readonly int EthernetProtocolTypeLength = 2;
/// <summary>
/// Position of the ethernet protocol type field
/// </summary>
public static readonly int EthernetProtocolTypePosition;
/// <summary>
/// Link layer address length
/// </summary>
public static readonly int LinkLayerAddressLengthLength = 2;
/// <summary>
/// Positino of the link layer address length field
/// </summary>
public static readonly int LinkLayerAddressLengthPosition;
/// <summary>
/// The link layer address field length
/// NOTE: the actual link layer address MAY be shorter than this
/// </summary>
public static readonly int LinkLayerAddressMaximumLength = 8;
/// <summary>
/// Position of the link layer address field
/// </summary>
public static readonly int LinkLayerAddressPosition;
/// <summary>
/// Link layer address type
/// </summary>
public static readonly int LinkLayerAddressTypeLength = 2;
/// <summary>
/// Position of the link layer address type field
/// </summary>
public static readonly int LinkLayerAddressTypePosition;
/// <summary>
/// Length of the packet type field
/// </summary>
public static readonly int PacketTypeLength = 2;
/// <summary>
/// Position of the packet type field
/// </summary>
public static readonly int PacketTypePosition = 0;
/// <summary>
/// Number of bytes in a SLL header
/// </summary>
public static readonly int SLLHeaderLength = 16;
static LinuxSllFields()
{
LinkLayerAddressTypePosition = PacketTypePosition + PacketTypeLength;
LinkLayerAddressLengthPosition = LinkLayerAddressTypePosition + LinkLayerAddressTypeLength;
LinkLayerAddressPosition = LinkLayerAddressLengthPosition + LinkLayerAddressLengthLength;
EthernetProtocolTypePosition = LinkLayerAddressPosition + LinkLayerAddressMaximumLength;
}
}
}