Bootstrapinfo example

Program.cs

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

namespace BootstrapCheck
{
    class Program
    {
        static int tries = 5;

        static void Main(string[] args)
        {
            if (args.Length != 2)
                return;

            IPAddress address;
            if (!IPAddress.TryParse(args[0], out address))
            {
                Console.WriteLine("First argument should be a valid IP address");
                return;
            }

            ushort port;
            if (!ushort.TryParse(args[1], out port))
            {
                Console.WriteLine("Second argument should be a valid port");
                return;
            }

            var endpoint = (EndPoint)new IPEndPoint(address, port);
            var socket = new Socket(endpoint.AddressFamily, SocketType.Dgram, ProtocolType.Udp);
            socket.ReceiveTimeout = 1000;

            byte[] request = new byte[78];
            request[0] = 240;

            for (int i = 0; i < tries; i++)
            {
                socket.SendTo(request, endpoint);
                Console.WriteLine("Sent {0} byte request to {1}", request.Length, endpoint);

                byte[] buffer = new byte[2048];
                int received = 0;

                try { received = socket.ReceiveFrom(buffer, ref endpoint); }
                catch (SocketException ex)
                {
                    Console.WriteLine("Socket error: {0}", ex.SocketErrorCode);
                    continue;
                }
                catch (Exception ex)
                {
                    Console.WriteLine("Exception: {0}", ex.Message);
                    continue;
                }

                byte[] data = new byte[received];
                Array.Copy(buffer, 0, data, 0, received);

                int version = IPAddress.HostToNetworkOrder((int)BitConverter.ToUInt32(data, 1));
                string motd = Encoding.UTF8.GetString(data, 5, data.Length - 5);

                Console.WriteLine("Bootstrap info {{ Source: {0}, version: {1}, motd: {2} }}", endpoint.ToString(), version, motd);
                break;
            }

            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
    }
}