C#でping(要管理者権限)

Program.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;

namespace PingSample
{
	class Program
	{
		static void Main(string[] args)
		{
			if(args.Length<1) Console.WriteLine("Usage: PingSample {IP}");
			else{
				IPAddress ip;
				if(!IPAddress.TryParse(args[0],out ip)){
					Console.WriteLine("Invalid IP...");
					return;
				}
				SendPing(ip);
			}
		}

		static void SendPing(IPAddress ip)
		{
			var icmpHeader=new List<byte>(){
				0x08,0x00,0x00,0x00,
				/*  id  */0x00,0x00};
			icmpHeader.InsertRange(4,BitConverter.GetBytes((ushort)Process.GetCurrentProcess().Id).Reverse());
			icmpHeader.AddRange(Encoding.ASCII.GetBytes("hi,whats up?"));
			var icmpHeaderChecksum=BitConverter.GetBytes(ComputeChecksum(icmpHeader.ToArray()));
			icmpHeader[2]=icmpHeaderChecksum[0];
			icmpHeader[3]=icmpHeaderChecksum[1];
			var socket=new Socket(AddressFamily.InterNetwork,SocketType.Raw,ProtocolType.Icmp);
			socket.SetSocketOption(SocketOptionLevel.Socket,SocketOptionName.SendTimeout,1000);
			socket.SetSocketOption(SocketOptionLevel.Socket,SocketOptionName.ReceiveTimeout,1000);
			try{
				Console.WriteLine("Send ping to "+ip.ToString()+"...");
				socket.SendTo(icmpHeader.ToArray(),new IPEndPoint(ip,0));
				var buffer=new byte[128];
				socket.Receive(buffer);
			}catch(Exception){
				Console.WriteLine("Failed!");
			}
			Console.WriteLine("Success!");
		}

		static ushort ComputeChecksum(byte[] data)
		{
			var shortPacket=from i in Enumerable.Range(0,data.Length).Where(i=>i%2==0)
							select BitConverter.ToUInt16(data,i);
			var sum=shortPacket.Sum(s=>(int)s);
			while(sum>>16!=0) sum=(sum&0xFFFF)+(sum>>16);
			return (ushort)~sum;
		}
	}
}