在unity里面 怎么得到接收udp消息的消息头

Question

在unity里面 怎么得到接收udp消息的消息头
初始化
ipEnd = new IPEndPoint(IPAddress.Parse(ipAddress), ConnectPort);
socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
socket.Bind(ipEnd);
//定义客户端
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
clientEnd = (EndPoint)sender;
//开启一个线程连接
connectThread = new Thread(new ThreadStart(SocketReceive));
connectThread.Start();
接收 recvData = new byte[81920];
recvLen = socket.ReceiveFrom(recvData, ref clientEnd);
recvStr = Encoding.UTF8.GetString(recvData, 0, recvLen);

Answer 1

using System.Collections.Generic;
 using System.Net;
 using System.Net.Sockets;
 using System.Text;
 using System.Threading;
 using UnityEngine;
 using System;
 
 public class UDPClient2Client : MonoBehaviour
 {
     public static UDPClient2Client Instance = null;
     private UdpClient client;
     private Thread thread = null;
     private IPEndPoint remotePoint;
     public string ip="127.0.0.1";
     private int port = 9090;
 
     public Action<string> receiveMsg = null;
 
     private string receiveString = null;     void Awake()
     {
         if (Instance == null)
         {
             Instance = this;
             DontDestroyOnLoad(gameObject);
         }
         else
         {
             Destroy(gameObject);
         }
     }
     // Use this for initialization
     void Start()
     {
 
         
 
       //  ip = IPManager.ipAddress;
         remotePoint = new IPEndPoint(IPAddress.Any, 0);
         thread = new Thread(ReceiveMsg);
         thread.Start();
     }
     //接受消息
     void ReceiveMsg()
     {
         while (true)
         {
             client = new UdpClient(port);
 
             byte[] receiveData = client.Receive(ref remotePoint);//接收数据
             receiveString = Encoding.UTF8.GetString(receiveData);
 
             client.Close();            
         }
     }
     //发送消息
     void SendMsg(IPAddress ip, string _msg)
     {
         IPEndPoint remotePoint = new IPEndPoint(ip, port);//实例化一个远程端点 
 
         if (_msg != null)
         {
             byte[] sendData = Encoding.Default.GetBytes(_msg);
             UdpClient client = new UdpClient();
             client.Send(sendData, sendData.Length, remotePoint);//将数据发送到远程端点 
             client.Close();//关闭连接
         }
     }
     // Update is called once per frame
     void Update()
     {
         if (!string.IsNullOrEmpty(receiveString))
         {
             
             //消息处理
             if (receiveMsg != null && remotePoint.Address.ToString() ！= ip)
             {
                 Debug.Log(remotePoint.Address + ":" + remotePoint.Port + " ---> " + receiveString);
                 receiveMsg.Invoke(receiveString);
                 receiveString = null;
                 
             }
         }
         
    }
     void OnDestroy()
     {
         SocketQuit();
    }
     void SocketQuit()
     {
         thread.Abort();
         thread.Interrupt();
         client.Close();
     }
     void OnApplicationQuit()
     {
         SocketQuit();
     }
 
     
  
 }
  接受消息添加委托   

void Start()
    {
        

        UDPClient2Client.Instance.receiveMsg = Rstring;



}
  void Rstring(string str) {
        Debug.Log(str);
      }