ttl stuff

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

namespace HopCount
{
    class Program
    {
        private static string requestText = "Host: {0}\r\nUser-Agent: test\r\nAccept: text/html";
        private static Stopwatch stopwatch = new Stopwatch();

        static void Main(string[] args)
        {
            stopwatch.Start();
            int hops = GetHops("youtube.com", 200);
            stopwatch.Stop();
            Console.WriteLine(String.Format("Počet routerů: {0}, čas: {1} ms.", hops, stopwatch.ElapsedMilliseconds));
            Console.Read();

        }

        static int GetHops(string host, int timeout)
        {

            string request = String.Format(requestText, host);
            byte[] message = Encoding.ASCII.GetBytes(request);

            IPHostEntry ipTarget = Dns.GetHostEntry(host);
            TcpClient client = new TcpClient();

            client.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, timeout);
            client.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendTimeout, timeout);


            for (int i = 1; i < 255; i++)
            {
                client.Client.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.IpTimeToLive, i);

                try
                {
                    client.Connect(ipTarget.AddressList[0], 80);

                    NetworkStream ns = client.GetStream();

                    if (ns.CanWrite)
                    {
                        ns.Write(message, 0, message.Length);
                    }

                    if (ns.CanRead)
                    {
                        byte[] buffer = new byte[1000];
                        ns.Read(buffer, 0, 1000);
                        Console.WriteLine(Encoding.ASCII.GetString(buffer));

                        return (i - 1);
                    }

                }
                catch (SocketException se)
                {
                    Console.WriteLine(se.ToString());
                }
            }

            return -1;
        }
    }
}