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

lib/Packet.Net/PacketDotNet/IPv6Fields.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>
+    /// A struct containing length and position information about IPv6 Fields.
+    /// </summary>
+    public struct IPv6Fields
+    {
+        /// <summary>
+        /// The IP Version, Traffic Class, and Flow Label field length. These must be in one
+        /// field due to boundary crossings.
+        /// </summary>
+        public readonly static int VersionTrafficClassFlowLabelLength = 4;
+
+        /// <summary>
+        /// The payload length field length.
+        /// </summary>
+        public readonly static int PayloadLengthLength = 2;
+
+        /// <summary>
+        /// The next header field length, identifies protocol encapsulated by the packet
+        /// </summary>
+        public readonly static int NextHeaderLength = 1;
+
+        /// <summary>
+        /// The hop limit field length.
+        /// </summary>
+        public readonly static int HopLimitLength = 1;
+
+        /// <summary>
+        /// Address field length
+        /// </summary>
+        public readonly static int AddressLength = 16;
+
+        /// <summary>
+        /// The byte position of the field line in the IPv6 header.
+        /// This is where the IP version, Traffic Class, and Flow Label fields are.
+        /// </summary>
+        public readonly static int VersionTrafficClassFlowLabelPosition = 0;
+
+        /// <summary>
+        /// The byte position of the payload length field.
+        /// </summary>
+        public readonly static int PayloadLengthPosition;
+
+        /// <summary>
+        /// The byte position of the next header field. (Replaces the ipv4 protocol field)
+        /// </summary>
+        public readonly static int NextHeaderPosition;
+
+        /// <summary>
+        /// The byte position of the hop limit field.
+        /// </summary>
+        public readonly static int HopLimitPosition;
+
+        /// <summary>
+        /// The byte position of the source address field.
+        /// </summary>
+        public readonly static int SourceAddressPosition;
+
+        /// <summary>
+        /// The byte position of the destination address field.
+        /// </summary>
+        public readonly static int DestinationAddressPosition;
+
+        /// <summary>
+        /// The byte length of the IPv6 Header
+        /// </summary>
+        public readonly static int HeaderLength; // == 40
+
+        /// <summary>
+        /// Commutes the field positions.
+        /// </summary>
+        static IPv6Fields( )
+        {
+            PayloadLengthPosition = VersionTrafficClassFlowLabelPosition + VersionTrafficClassFlowLabelLength;
+            NextHeaderPosition = PayloadLengthPosition + PayloadLengthLength;
+            HopLimitPosition = NextHeaderPosition + NextHeaderLength;
+            SourceAddressPosition = HopLimitPosition + HopLimitLength;
+            DestinationAddressPosition = SourceAddressPosition + AddressLength;
+            HeaderLength = DestinationAddressPosition + AddressLength;
+        }
+    }
+}