서버

using System;
using System.Linq;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Threading;

namespace ServerTest
{
    public partial class Form1 : Form
    {
        private TcpListener Server;
        private TcpClient SerClient;
        private NetworkStream myStream;
        private StreamWriter myWrite;
        private Boolean Start = false;
        private Thread myServer;

        private int[] intArr;

        public Form1()
        {
            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            intArr = new int[40];

            for (int i = 0; i < intArr.Length; i++)
            {
                intArr[i] = i;
            }

            Start = true;
            IPAddress addr = new IPAddress(0);
            Server = new TcpListener(addr, 2007);
            Server.Start();          

            myServer = new Thread(ServerStart);
            myServer.Start();
           

            //this.Timer.Enabled = true;
        }

        private void ServerStart()
        {

           

            if (txtMessage.InvokeRequired)
            {
                txtMessage.Invoke(new MessageViewHandler(MessageView), "server start");
            }
            while (Start)
            {
                try
                {
                    SerClient = Server.AcceptTcpClient();

                    if (txtMessage.InvokeRequired)
                    {
                        txtMessage.Invoke(new MessageViewHandler(MessageView), "Client is connected");
                    }
                    else
                        MessageView("Client is connected");

                    myStream = SerClient.GetStream();
                    myWrite = new StreamWriter(myStream);
                }
                catch { }
            }
            
        }

 

        private void MessageView(string strText)
        {           
           
            this.txtMessage.AppendText(strText + "\r\n");
            this.txtMessage.Focus();
            this.txtMessage.ScrollToCaret();
         
        }

        private delegate void MessageViewHandler(string strText);
      
        /*
        private void Timer_Tick(object sender, EventArgs e)
        {
            Msg_send();
        }

        private void Msg_send()
        {
            try
            {
                string dt = Convert.ToString(DateTime.Now);
                myWrite.WriteLine(dt);
                myWrite.Flush();
            }
            catch { }
        }
         */

        private void btnSend_Click(object sender, EventArgs e)
        {
            byte[] size = new byte[64];
            byte[] data = new byte[intArr.Length * 4];

            size = BitConverter.GetBytes(intArr.Length);
            myStream.Write(size, 0, size.Length);

            for (int k = 0; k < intArr.Length; k++)
            {
                intToByte(intArr[k], data, k * 4);
            }

            /*
            if (myStream != null && myWrite != null)
            {               
                myWrite.WriteLine("서버에서 메시지를 보냅니다.");
                myWrite.Flush();
            }*/
            myStream.Write(data, 0, data.Length);

        }

        public void intToByte(int value, byte[] data, int idx)
        {

        // int는 4byte이므로 4개의 byte에 기록 (int = 4byte = 32bit)

        // 32bit를 24칸 쉬프팅을 하면 24비트는 짤리고 마지막 8bit(상위 1byte)에 값이 들어간다.

        // 이것을 byte 캐스팅을 해버리면 8bit가 짤려서 저장된다.

        // 나머지 24bit도 값을 밀어서 바이트(8비트)로 자른 뒤 집어넣는다.

        // 즉 배열에 인덱스를 하나씩 증가시키면서 int값을 8bit씩 잘라서 집어넣는다.

        // 마지막 배열에는 8비트만이 남으므로 쉬프트 연산으로 밀어버릴 필요가 없다.

        data[idx] = (byte)(value >> 24);

        data[++idx] = (byte)(value >> 16);

        data[++idx] = (byte)(value >> 8);

        data[++idx] = (byte)value;
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (!(myWrite == null))
            {
                try
                {
                    myWrite.WriteLine("서버를 종료합니다");
                    myWrite.Flush();
                }
                catch
                { }
            }

            this.Start = false;
            //this.Timer.Enabled = false;

            if (!(myWrite == null))
            {
                myWrite.Close();
            }

            if (!(myStream == null))
            {
                myStream.Close();

            }

            if (!(SerClient == null))
            {
                SerClient.Close();

            }

            if (!(Server == null))
            {
                Server.Stop();
            }

            if (!(myServer == null))
            {
                myServer.Abort();
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int i;
            string strHostName;

            // Getting Ip address of local machine...
            // First get the host name of local machine.
            strHostName = Dns.GetHostName();

            // Then using host name, get the IP address list..
            IPHostEntry ipEntry = Dns.GetHostEntry(strHostName);
            IPAddress[] addr = ipEntry.AddressList;

           
            for (i = 0; i < addr.Length; i++)
            {
                txtMessage.Text += addr[i].ToString() + "\r\n";
                
                /*
                if (addr[i].AddressFamily.ToString() != "InterNetworkV6")
                {
                    break;
                }*/
            }

            //MessageBox.Show(addr[i].ToString());
        }

    }
}