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

lib/Packet.Net/PacketDotNet/PPPoEFields.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
+{
+    /// <summary>
+    /// Point to Point Protocol
+    /// See http://tools.ietf.org/html/rfc2516
+    /// </summary>
+    public class PPPoEFields
+    {
+        /// <summary> Size in bytes of the version/type field </summary>
+        public readonly static int VersionTypeLength = 1;
+
+        /// <summary> Size in bytes of the code field </summary>
+        public readonly static int CodeLength = 1;
+
+        /// <summary> Size in bytes of the SessionId field </summary>
+        public readonly static int SessionIdLength = 2;
+
+        /// <summary> Size in bytes of the Length field </summary>
+        public readonly static int LengthLength = 2;
+
+        /// <summary> Offset from the start of the header to the version/type field </summary>
+        public readonly static int VersionTypePosition = 0;
+
+        /// <summary> Offset from the start of the header to the Code field </summary>
+        public readonly static int CodePosition;
+
+        /// <summary> Offset from the start of the header to the SessionId field </summary>
+        public readonly static int SessionIdPosition;
+
+        /// <summary> Offset from the start of the header to the Length field </summary>
+        public readonly static int LengthPosition;
+
+        /// <summary>
+        /// Length of the overall PPPoe header
+        /// </summary>
+        public readonly static int HeaderLength;
+
+        static PPPoEFields()
+        {
+            CodePosition = VersionTypePosition + VersionTypeLength;
+            SessionIdPosition = CodePosition + CodeLength;
+            LengthPosition = SessionIdPosition + SessionIdLength;
+
+            HeaderLength = LengthPosition + LengthLength;
+        }
+    }
+}
+