仿真平台内核初版 -tlib库 包含<sparc arm riscv powerPC>

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