55 lines
1.8 KiB
C#
55 lines
1.8 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Net.Sockets;
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using System.Text;
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using System.Threading.Tasks;
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namespace MSGer.tk
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{
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public static class ICMPPacket
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{
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public const byte Type = ICMP_ECHO;
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public const byte SubCode = 0;
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public const byte RespType = ICMP_TIME_EXCEEDED;
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public const byte RespCode = 1;
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public const UInt16 CheckSum = 0;
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public const UInt16 Identifier = 52;
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public const UInt16 SequenceNumber = 84;
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public static readonly byte[] Data = Encoding.Unicode.GetBytes("MSGer.tk connection");
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public const byte ICMP_ECHO = 8;
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public const byte ICMP_REPLY = 0;
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public const byte ICMP_TIME_EXCEEDED = 11;
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public static byte[] CreateRequest() //2015.02.05.
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{
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var data = new List<byte>();
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data.Add(Type);
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data.Add(SubCode);
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data.AddRange(BitConverter.GetBytes(CheckSum));
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data.AddRange(BitConverter.GetBytes(Identifier));
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data.AddRange(BitConverter.GetBytes(SequenceNumber));
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data.AddRange(Data);
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return data.ToArray();
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}
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public static byte[] CreateReply()
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{
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//ICMPPacket packet = new ICMPPacket();
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var data = new List<byte>();
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data.Add(RespType);
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data.Add(RespCode);
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data.AddRange(BitConverter.GetBytes(CheckSum));
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data.AddRange(BitConverter.GetBytes((int)0)); //4 bytes unused
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data.AddRange(CreateRequest()); //Original packet
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return data.ToArray();
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}
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public static bool IsPacketGood(byte[] bytes)
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{
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return (bytes[0] == ICMP_TIME_EXCEEDED);
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}
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}
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}
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