unity3d：最简单的服务器，把收到消息发回客户端

using UnityEngine;  
using System.Collections;
using System.Collections.Generic;
using System.Net.Sockets;
using System.Net;
using System.Threading;
using System;
using System.Text;  
using UnityEngine.UI;

public class Server: MonoBehaviour {  

    private static byte[] result = new byte[1024];  
    static Socket serverSocket;
    Thread myThread;

    void Start()  
    {  
        //服务器IP地址  
        IPAddress ip = IPAddress.Parse(GameConst.IP);  
        serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);  
        serverSocket.Bind(new IPEndPoint(ip, GameConst.Port));  //绑定IP地址：端口  
        serverSocket.Listen(10);    //设定最多10个排队连接请求  
        //通过Clientsoket发送数据  
        myThread = new Thread(ListenClientConnect);  
        myThread.Start();  
        Console.ReadLine();  
    }  

    /// <summary>  
    /// 监听客户端连接  
    /// </summary>  
    private void ListenClientConnect()  
    {  
        while (true)  
        { 
            Socket clientSocket = serverSocket.Accept();  
            Thread receiveThread = new Thread(ReceiveMessage);  
            receiveThread.Start(clientSocket); 
            //Debug.Log(clientSocket.RemoteEndPoint.ToString());
        }  
    }  

    /// <summary>  
    /// 接收消息
    /// </summary>  
    /// <param name="clientSocket"></param>  
    private static void ReceiveMessage(object clientSocket)  
    {  
        Socket myClientSocket = (Socket)clientSocket;  
        while (true)  
        {  
            try  
            {  
                int receiveNumber = myClientSocket.Receive(result);
                if (receiveNumber > 0)
                {
                    myClientSocket.Send(result, receiveNumber,0);
                }
            }  
            catch(Exception ex)  
            {  
                //Console.WriteLine(ex.Message);  
                myClientSocket.Shutdown(SocketShutdown.Both);  
                myClientSocket.Close();  
                break;  
            }  
        }  
    }

    void OnApplicationQuit()
    {

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


}