u3d udp服务器

using UnityEngine;
using System.Collections;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System;
using System.Threading;
public class udpServer :MonoBehaviour
{

    private Socket newsock;//定义一个socket变量
    IPEndPoint ip;//定义一个IP地址和端口号
    int recv;//定义一个接受值的变量
    byte[] data = new byte[1024];//定义一个二进制的数组用来获取客户端发过来的数据包
    string mydata;
    void Start()
    {
        //得到本机IP，设置TCP端口号
        ip = new IPEndPoint(IPAddress.Any, 12345);//设置自身的IP和端口号，在这里IPAddress.Any是自动获取本机IP
        newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);//实例化socket对象设置寻址方案为internetwork（IP版本的4存放）,设置Soket的类型，为Dgram（支持数据报形式的数据），设置协议的类型，为UDP
        //绑定网络地址
        newsock.Bind(ip);//绑定IP
        Debug.Log("This is a Server,host name is " + Dns.GetHostName());//输出本地的名字
        Debug.Log("Waiting for a client");
        //BeginReceives();
        Thread test = new Thread(BeginListening);//定义一个子线程
        test.Start();//子线程开始
    }

    void BeginListening()
    {
        IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);//实例化一个网络端点，设置为IPAddress.Any为自动获取跟我通讯的IP，0代表所有的地址都可以
        EndPoint Remote = (EndPoint)(sender);//实例化一个地址结束点来标识网络路径
      //  Debug.Log(Encoding.ASCII.GetString(data, 0, recv));//输出二进制转换为string类型用来测试
        while (true)
        {
            data = new byte[1024];//实例化data
            recv = newsock.ReceiveFrom(data, ref Remote);//将数据包接收到的数据放入缓存点，并存储终节点
            //Debug.Log(Encoding.ASCII.GetString(data, 0, recv));
            mydata = Encoding.ASCII.GetString(data, 0, recv);
            Debug.Log(mydata);
            // newsock.SendTo(Encoding.ASCII.GetBytes(mydata),mydata.Length,SocketFlags.None,Remote);
        }
    }
    string input = "";
    void SendMessage(string message)
    {
        byte[] data = new byte[1024];
        Debug.Log("This is a client,host name is" + Dns.GetHostName());
        //IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);//实例化一个网络端点，设置为IPAddress.Any为自动获取跟我通讯的IP，0代表所有的地址都可以
        EndPoint Remote = (EndPoint)(ip);//实例化一个地址结束点来标识网络路径
        Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

        //string welcome = "你好";
        //data = Encoding.ASCII.GetBytes(welcome);
        ip = new IPEndPoint(IPAddress.Parse("192.168.1.120"), 12346);
       // server.SendTo(data, data.Length, SocketFlags.None, ip);
       // data = new byte[1024];
        server.SendTo(Encoding.ASCII.GetBytes(message), ip);
       // data = new byte[1024];
        Debug.Log("Stopping Client.");
        server.Close();
    }
    void OnGUI()
    {
        //input = GUILayout.TextField(input);
        input = GUI.TextField(new Rect(100, 50, 60, 30), input);
        if (GUI.Button(new Rect(100, 90, 60, 30), "Send"))
        {
            SendMessage(input);
        }
    }
    void OnApplicationQuit()
    {
        newsock.Close();
    }
}

　　

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

public struct mystructs
{

    public int Age; //获取结构里的
    public string name;
    public float Height;
    public mystructs(int myage, string myname, float myheight)
    {
        Age = myage;
        name = myname;
        Height = myheight;
    }
}
public class udpMystruct : MonoBehaviour
{
    int Age;
    string Name;//获取
    float Height;
    private Socket newsock;//定义一个socket变量
    IPEndPoint ip;//定义一个IP地址和端口号
    int recv;//定义一个接受值的变量
    byte[] data = new byte[1024];//定义一个二进制的数组用来获取客户端发过来的数据包
    byte[] bytedate = new byte[1024];
    string mydata;
    void Start()
    {
        mystructs my;    //将结构初始化  付给另一个
        Age = my.Age = 17;
        Name = my.name = "  haha  ";
        Height = my.Height = 180.50f;
        Debug.Log(Age + Name + Height);
        byte[] agebyte = new byte[1024];   //定义二进制数组
        byte[] namebyte = new byte[1024];
        byte[] heightbyte = new byte[1024];
        agebyte = Encoding.ASCII.GetBytes(Age.ToString());  //转换成二进制的
        namebyte = Encoding.ASCII.GetBytes(Name);
        heightbyte = Encoding.ASCII.GetBytes(Height.ToString());
        bytedate = new byte[agebyte.Length + namebyte.Length + heightbyte.Length];  //byte
        agebyte.CopyTo(bytedate, 0); //把值 拷贝 给bytedate  索引
        namebyte.CopyTo(bytedate, agebyte.Length);  //agebyte索引开始
        heightbyte.CopyTo(bytedate, namebyte.Length);
        //string sss = Encoding.ASCII.GetString(data);
        //  Debug.Log(sss);

        //得到本机IP，设置TCP端口号
        ip = new IPEndPoint(IPAddress.Parse("192.168.1.120"), 12346);//设置自身的IP和端口号，在这里IPAddress.Any是自动获取本机IP
        newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);//实例化socket对象设置寻址方案为internetwork（IP版本的4存放）,设置Soket的类型，为Dgram（支持数据报形式的数据），设置协议的类型，为UDP
        //绑定网络地址
        newsock.Bind(ip);//绑定IP
        Debug.Log("This is a Server,host name is  " + Dns.GetHostName());//输出本地的名字
        Debug.Log("Waiting for a client");
        Thread test = new Thread(BeginListening);//定义一个子线程
        test.Start();//子线程开始
    }
    void BeginListening()
    {
        //      IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);//实例化一个网络端点，设置为IPAddress.Any为自动获取跟我通讯的IP，0代表所有的地址都可以
        EndPoint Remote = (EndPoint)(ip);//实例化一个地址结束点来标识网络路径
        Debug.Log(Encoding.ASCII.GetString(data, 0, recv));//输出二进制转换为string类型用来测试
        while (true)
        {
            data = new byte[1024];//实例化data
            recv = newsock.ReceiveFrom(data, ref Remote);//将数据包接收到的数据放入缓存点，并存储终节点
            //Debug.Log(Encoding.ASCII.GetString(data, 0, recv));
            mydata = Encoding.ASCII.GetString(data, 0, recv);
            Debug.Log(mydata);
            // newsock.SendTo(Encoding.ASCII.GetBytes(mydata),mydata.Length,SocketFlags.None,Remote);
        }

    }
    string input = "";
    void SendMessage(string message)
    {

        byte[] data = new byte[1024];
        byte[] messbyte = new byte[1024];

        Debug.Log("This is a client,host name is  " + Dns.GetHostName());
        ip = new IPEndPoint(IPAddress.Parse("192.168.1.120"), 12345);
        Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
        EndPoint ep = (EndPoint)ip;
        //string welcome = "你好";
        //data = Encoding.ASCII.GetBytes(welcome);
        server.SendTo(data, data.Length, SocketFlags.None, ep);
        messbyte = Encoding.ASCII.GetBytes(message);
        data = new byte[bytedate.Length + messbyte.Length];
        bytedate.CopyTo(data, 0);
        messbyte.CopyTo(data, bytedate.Length);

        server.SendTo(data, ep);
        data = new byte[1024];
        Debug.Log("Stopping Client.");
        server.Close();

    }
    void OnGUI()
    {

        input = GUILayout.TextField(input);
        if (GUILayout.Button("发送"))
        {
            SendMessage(input);
        }
    }
    void OnApplicationQuit()
    {
        newsock.Close();
    }

}