C#

/*

C# TCP
by Joshua Garrett

 */


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

public class Server
{
    public static void Main()
    {
        byte[] data = new byte[1024];
        IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 7557);
        UdpClient newsock = new UdpClient(ipep);

        Console.WriteLine("Waiting for a client...");

        IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);

        data = newsock.Receive(ref sender);

        Console.WriteLine("Connection received from {0}", sender.ToString());

        string welcome = "OpticVPS Remote Administration";  //where?
        data = Encoding.ASCII.GetBytes(welcome);
        newsock.Send(data, data.Length, sender);

        while (true)
        {
            data = newsock.Receive(ref sender);

                
            if (Encoding.ASCII.GetString(data, 0, data.Length) == "help")
            {
                string okay = "You can use the following commands";

                Console.WriteLine("Help List Accessed By: {0}", sender.ToString());
                
                data = Encoding.ASCII.GetBytes(okay);
                newsock.Send(data, data.Length, sender);
            }
            else if (Encoding.ASCII.GetString(data, 0, data.Length) == "shutdown")
            {
                string shutdown = "Command Received, Shutting Down Now";

                Console.WriteLine("Shutdown Issued - {0}", sender.ToString());

                data = Encoding.ASCII.GetBytes(shutdown);
                newsock.Send(data, data.Length, sender);


            }
            else
            {
                string err = "Command Not Found [End Of Line]";

                Console.WriteLine("Command Error - {0}", sender.ToString());

                data = Encoding.ASCII.GetBytes(err);
                newsock.Send(data, data.Length, sender);
            
            }
           // newsock.Send(data, data.Length, sender);
        }
    }
    
}