客户端
using UnityEngine;
using System.Collections;
//引入库
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using UnityEngine.UI;
public class UdpClient : MonoBehaviour
{
//以下默认都是私有的成员
Socket socket; //目标socket
EndPoint serverEnd; //服务端
IPEndPoint ipEnd; //服务端端口
string recvStr; //接收的字符串
string sendStr; //发送的字符串
byte[] recvData = new byte[1024]; //接收的数据,必须为字节
byte[] sendData = new byte[1024]; //发送的数据,必须为字节
int recvLen; //接收的数据长度
Thread connectThread; //连接线程
//初始化
void InitSocket(string IP,int port)
{
//定义连接的服务器ip和端口,可以是本机ip,局域网,互联网
ipEnd = new IPEndPoint(IPAddress.Parse(IP),port);
//定义套接字类型,在主线程中定义
socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
//定义服务端
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
serverEnd = (EndPoint)sender;
print("waiting for sending UDP dgram");
//建立初始连接,这句非常重要,第一次连接初始化了serverEnd后面才能收到消息
SocketSend("hello");
//开启一个线程连接,必须的,否则主线程卡死
connectThread = new Thread(new ThreadStart(ThreadSocketReceive));
beginOrEndReceiveThread();
}
void beginOrEndReceiveThread()
{
if (connectThread.ThreadState == ThreadState.Running)
{
connectThread.Abort();
}
else
{
connectThread.Start();
}
}
void SocketSend(string sendStr)
{
//清空发送缓存
sendData = new byte[1024];
//数据类型转换
sendData = Encoding.ASCII.GetBytes(sendStr);
//发送给指定服务端
socket.SendTo(sendData, sendData.Length, SocketFlags.None, ipEnd);
}
//服务器接收
void ThreadSocketReceive()
{
//进入接收循环
while (true)
{
//对data清零
recvData = new byte[1024];
//获取客户端,获取服务端端数据,用引用给服务端赋值,实际上服务端已经定义好并不需要赋值
recvLen = socket.ReceiveFrom(recvData, ref serverEnd);
print("message from: " + serverEnd.ToString()); //打印服务端信息
//输出接收到的数据
recvStr = Encoding.ASCII.GetString(recvData, 0, recvLen);
print(recvStr);
}
}
//连接关闭
void SocketQuit()
{
//关闭线程
if (connectThread != null)
{
connectThread.Interrupt();
connectThread.Abort();
}
//最后关闭socket
if (socket != null)
socket.Close();
}
// Use this for initialization
void Start()
{
}
void OnApplicationQuit()
{
SocketQuit();
}
}
服务端
using UnityEngine;
using System.Collections;
//引入库
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
public class UdpServer : MonoBehaviour
{
//以下默认都是私有的成员
public string IpAdress;//本机的IP地址
public int port;//端口
Socket socket; //目标socket
EndPoint clientEnd; //客户端
IPEndPoint ipEnd; //侦听端口
string recvStr; //接收的字符串
string sendStr; //发送的字符串
byte[] recvData = new byte[1024]; //接收的数据,必须为字节
byte[] sendData = new byte[1024]; //发送的数据,必须为字节
int recvLen; //接收的数据长度
Thread connectThread; //连接线程
float t = 0;
//获取当前IP地址
void getIp()
{
IPHostEntry localhost = Dns.GetHostEntry(Dns.GetHostName());
IPAddress localaddr = localhost.AddressList[0];
IpAdress= localaddr.ToString();
}
//初始化
void Start()
{
getIp();
InitSocket(); //在这里初始化server
}
void InitSocket()
{
//定义侦听端口,侦听任何IP
ipEnd = new IPEndPoint(IPAddress.Any, port);
//定义套接字类型,在主线程中定义
socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
//服务端需要绑定ip
socket.Bind(ipEnd);
//定义客户端
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
clientEnd = (EndPoint)sender;
print("waiting for UDP dgram");
//开启一个线程连接,必须的,否则主线程卡死
connectThread = new Thread(new ThreadStart(SocketReceive));
connectThread.Start();
}
void SocketSend(string sendStr)
{
//清空发送缓存
sendData = new byte[1024];
//数据类型转换
sendData = Encoding.ASCII.GetBytes(sendStr);
//发送给指定客户端
socket.SendTo(sendData, sendData.Length, SocketFlags.None, clientEnd);
}
//服务器接收
void SocketReceive()
{
//进入接收循环
while (true)
{
//对data清零
recvData = new byte[1024];
//获取客户端,获取客户端数据,用引用给客户端赋值
recvLen = socket.ReceiveFrom(recvData, ref clientEnd);
print("message from: " + clientEnd.ToString()); //打印客户端信息
//输出接收到的数据
recvStr = Encoding.ASCII.GetString(recvData, 0, recvLen);
print(recvStr);
//将接收到的数据经过处理再发送出去
sendStr = "From Server: " + recvStr;
SocketSend(sendStr);
}
}
//连接关闭
void SocketQuit()
{
//关闭线程
if (connectThread != null)
{
connectThread.Interrupt();
connectThread.Abort();
}
//最后关闭socket
if (socket != null)
socket.Close();
print("disconnect");
}
// Use this for initialization
// Update is called once per frame
void Update()
{
}
void OnApplicationQuit()
{
SocketQuit();
}
}