using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Runtime.InteropServices;
using System.Net.Sockets;
using System.Diagnostics;
using System.Threading;
using System.Net;

namespace ConsoleApplication1
{
    class Program
    {
        //C#
        [DllImport("KERNEL32")]
        public static extern int QueryPerformanceFrequency
        (
            ref Int64 lpFrequency
        );

        [DllImport("KERNEL32")]
        public static extern int QueryPerformanceCounter
        (
            ref Int64 lpPerformanceCount
        );

        static void Main(string[] args)
        {
            DateTime startTime, endTime;
            Int64 minDiff=1000000;
            Int64 freq = 0;
            Double time_ms = 0;
            Double mintime_ms = 1000000;
            Int64 mindistance = 0;
            Int64 count1 = 0;
            Int64 count2 = 0;
            Int64 distantse = 0;
            Int64 ls = 299792458;
            Int64 counts = 0;
            Int64 Overhead = 0;

            System.Net.IPAddress ipAddress = new System.Net.IPAddress(System.Net.IPAddress.Parse("127.0.0.1").GetAddressBytes());


            for (int i = 0; i < 1000; i++)
            {
                try
                {

                    if (QueryPerformanceFrequency(ref freq) != 0)
                    {

                        TcpClient tcpClient = new TcpClient();

                        count1 = 0;
                        count2 = 0;

                        QueryPerformanceCounter(ref count1);
                        tcpClient.Connect(ipAddress, 80);
                        QueryPerformanceCounter(ref count2);

                        if (count1 != 0 && count2 != 0)
                        {
                            time_ms = ((double)(count2 - count1)) / (3*freq);
                            distantse = (299792458 * (count2 - count1)) / (3*freq);
                            if (time_ms < mintime_ms)
                            {
                                mintime_ms = time_ms;
                                mindistance = distantse;
                            }

                            Console.WriteLine("Seconds:" + time_ms.ToString() + " Distantse:" + distantse.ToString());
                        }
                    }
                }
                catch (Exception e)
                {
                    Console.WriteLine(e.ToString());
                }

            }

            Console.WriteLine("Minimal time:" + mintime_ms.ToString()+" Minimal distance:"+mindistance.ToString());

            Console.ReadKey();

        }

    }
}