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

lib/Packet.Net/PacketDotNet/UdpFields.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 <chmorgan@gmail.com>
+ */
+namespace PacketDotNet
+{
+    /// <summary>
+    /// Defines the lengths and positions of the udp fields within
+    /// a udp packet
+    /// </summary>
+    public struct UdpFields
+    {
+        /// <summary> Length of a UDP port in bytes.</summary>
+        public readonly static int PortLength = 2;
+        /// <summary> Length of the header length field in bytes.</summary>
+        public readonly static int HeaderLengthLength = 2;
+        /// <summary> Length of the checksum field in bytes.</summary>
+        public readonly static int ChecksumLength = 2;
+        /// <summary> Position of the source port.</summary>
+        public readonly static int SourcePortPosition = 0;
+        /// <summary> Position of the destination port.</summary>
+        public readonly static int DestinationPortPosition;
+        /// <summary> Position of the header length.</summary>
+        public readonly static int HeaderLengthPosition;
+        /// <summary> Position of the header checksum length.</summary>
+        public readonly static int ChecksumPosition;
+        /// <summary> Length of a UDP header in bytes.</summary>
+        public readonly static int HeaderLength; // == 8
+
+        static UdpFields()
+        {
+            DestinationPortPosition = PortLength;
+            HeaderLengthPosition = DestinationPortPosition + PortLength;
+            ChecksumPosition = HeaderLengthPosition + HeaderLengthLength;
+            HeaderLength = ChecksumPosition + ChecksumLength;
+        }
+    }
+}