59 lines
2.3 KiB
C#
59 lines
2.3 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 2010 Chris Morgan <chmorgan@gmail.com>
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*/
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using System;
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namespace PacketDotNet
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{
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namespace Ieee80211
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{
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/// <summary>
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///
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/// NOTE: All positions are not defined here because the frame type changes
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/// whether some address fields are present or not, causing the sequence control
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/// field to move. In addition the payload size determines where the frame control
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/// sequence value is as it is after the payload bytes, if any payload is present
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/// </summary>
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class MacFields
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{
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public readonly static int FrameControlLength = 2;
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public readonly static int DurationIDLength = 2;
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public readonly static int AddressLength = EthernetFields.MacAddressLength;
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public readonly static int SequenceControlLength = 2;
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public readonly static int FrameCheckSequenceLength = 4;
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public readonly static int FrameControlPosition = 0;
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public readonly static int DurationIDPosition;
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/// <summary>
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/// Not all MAC Frames contain a sequence control field. The value of this field is only meaningful when they do.
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/// </summary>
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public readonly static int SequenceControlPosition;
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public readonly static int Address1Position;
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static MacFields()
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{
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DurationIDPosition = FrameControlPosition + FrameControlLength;
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Address1Position = DurationIDPosition + DurationIDLength;
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SequenceControlPosition = MacFields.Address1Position + (MacFields.AddressLength * 3);
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}
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}
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}
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}
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