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

lib/Packet.Net/PacketDotNet/LinuxSLLPacket.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>
+ */
+using System;
+using System.Collections.Generic;
+using System.Text;
+using MiscUtil.Conversion;
+using PacketDotNet.Utils;
+
+namespace PacketDotNet
+{
+    /// <summary>
+    /// Represents a Linux cooked capture packet, the kinds of packets
+    /// received when capturing on an 'any' device
+    ///
+    /// See http://github.com/mcr/libpcap/blob/master/pcap/sll.h
+    /// </summary>
+    public class LinuxSLLPacket : InternetLinkLayerPacket
+    {
+        /// <value>
+        /// Information about the packet direction
+        /// </value>
+        public LinuxSLLType Type
+        {
+            get
+            {
+                return (LinuxSLLType)EndianBitConverter.Big.ToInt16(header.Bytes,
+                                                      header.Offset + LinuxSLLFields.PacketTypePosition);
+            }
+
+            set
+            {
+                var theValue = (Int16)value;
+                EndianBitConverter.Big.CopyBytes(theValue,
+                                                 header.Bytes,
+                                                 header.Offset + LinuxSLLFields.PacketTypePosition);
+            }
+        }
+
+        /// <value>
+        /// The
+        /// </value>
+        public int LinkLayerAddressType
+        {
+            get
+            {
+                return EndianBitConverter.Big.ToInt16(header.Bytes,
+                                                      header.Offset + LinuxSLLFields.LinkLayerAddressTypePosition);
+            }
+
+            set
+            {
+                var theValue = (Int16)value;
+                EndianBitConverter.Big.CopyBytes(theValue,
+                                                 header.Bytes,
+                                                 header.Offset + LinuxSLLFields.LinkLayerAddressTypePosition);
+            }
+        }
+
+        /// <value>
+        /// Number of bytes in the link layer address of the sender of the packet
+        /// </value>
+        public int LinkLayerAddressLength
+        {
+            get
+            {
+                return EndianBitConverter.Big.ToInt16(header.Bytes,
+                                                      header.Offset + LinuxSLLFields.LinkLayerAddressLengthPosition);
+            }
+
+            set
+            {
+                // range check
+                if((value < 0) || (value > 8))
+                {
+                    throw new System.InvalidOperationException("value of " + value + " out of range of 0 to 8");
+                }
+
+                var theValue = (Int16)value;
+                EndianBitConverter.Big.CopyBytes(theValue,
+                                                 header.Bytes,
+                                                 header.Offset + LinuxSLLFields.LinkLayerAddressLengthPosition);
+            }
+        }
+
+        /// <value>
+        /// Link layer header bytes, maximum of 8 bytes
+        /// </value>
+        public byte[] LinkLayerAddress
+        {
+            get
+            {
+                var headerLength = LinkLayerAddressLength;
+                var theHeader = new Byte[headerLength];
+                Array.Copy(header.Bytes, header.Offset + LinuxSLLFields.LinkLayerAddressPosition,
+                           theHeader, 0,
+                           headerLength);
+                return theHeader;
+            }
+
+            set
+            {
+                // update the link layer length
+                LinkLayerAddressLength = value.Length;
+
+                // copy in the new link layer header bytes
+                Array.Copy(value, 0,
+                           header.Bytes, header.Offset + LinuxSLLFields.LinkLayerAddressPosition,
+                           value.Length);
+            }
+        }
+
+        /// <value>
+        /// The encapsulated protocol type
+        /// </value>
+        public EthernetPacketType EthernetProtocolType
+        {
+            get
+            {
+                return (EthernetPacketType)EndianBitConverter.Big.ToInt16(header.Bytes,
+                                                      header.Offset + LinuxSLLFields.EthernetProtocolTypePosition);
+            }
+
+            set
+            {
+                var theValue = (Int16)value;
+                EndianBitConverter.Big.CopyBytes(theValue,
+                                                 header.Bytes,
+                                                 header.Offset + LinuxSLLFields.EthernetProtocolTypePosition);
+            }
+        }
+
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="bas">
+        /// A <see cref="ByteArraySegment"/>
+        /// </param>
+        public LinuxSLLPacket(ByteArraySegment bas)
+        {
+            header = new ByteArraySegment(bas);
+            header.Length = LinuxSLLFields.SLLHeaderLength;
+
+            // parse the payload via an EthernetPacket method
+            payloadPacketOrData = EthernetPacket.ParseEncapsulatedBytes(header,
+                                                                        EthernetProtocolType);
+        }
+
+        /// <summary cref="Packet.ToString(StringOutputType)" />
+        public override string ToString (StringOutputType outputFormat)
+        {
+            var buffer = new StringBuilder();
+            string color = "";
+            string colorEscape = "";
+
+            if(outputFormat == StringOutputType.Colored || outputFormat == StringOutputType.VerboseColored)
+            {
+                color = Color;
+                colorEscape = AnsiEscapeSequences.Reset;
+            }
+
+            if(outputFormat == StringOutputType.Normal || outputFormat == StringOutputType.Colored)
+            {
+                // build the output string
+                buffer.AppendFormat("[{0}LinuxSLLPacket{1}: Type={2}, LinkLayerAddressType={3}, LinkLayerAddressLength={4}, Source={5}, ProtocolType={6}]",
+                    color,
+                    colorEscape,
+                    Type,
+                    LinkLayerAddressType,
+                    LinkLayerAddressLength,
+                    BitConverter.ToString(LinkLayerAddress, 0),
+                    EthernetProtocolType);
+            }
+
+            if(outputFormat == StringOutputType.Verbose || outputFormat == StringOutputType.VerboseColored)
+            {
+                // collect the properties and their value
+                Dictionary<string,string> properties = new Dictionary<string,string>();
+                properties.Add("type", Type.ToString() + " (" + ((int)Type).ToString() + ")");
+                properties.Add("link layer address type", LinkLayerAddressType.ToString());
+                properties.Add("link layer address length", LinkLayerAddressLength.ToString());
+                properties.Add("source", BitConverter.ToString(LinkLayerAddress));
+                properties.Add("protocol", EthernetProtocolType.ToString() + " (0x" + EthernetProtocolType.ToString("x") + ")");
+
+
+                // calculate the padding needed to right-justify the property names
+                int padLength = Utils.RandomUtils.LongestStringLength(new List<string>(properties.Keys));
+
+                // build the output string
+                buffer.AppendLine("LCC:  ******* LinuxSLL - \"Linux Cooked Capture\" - offset=? length=" + TotalPacketLength);
+                buffer.AppendLine("LCC:");
+                foreach(var property in properties)
+                {
+                    buffer.AppendLine("LCC: " + property.Key.PadLeft(padLength) + " = " + property.Value);
+                }
+                buffer.AppendLine("LCC:");
+            }
+
+            // append the base output
+            buffer.Append(base.ToString(outputFormat));
+
+            return buffer.ToString();
+        }
+    }
+}