private static IEnumerator LanDiscoveryThread(ushort port, int listenWaitTime)
{
List<string> localSubNet = new List<string>();
NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces();
foreach (var netInterface in interfaces)
{
if ((netInterface.OperationalStatus == OperationalStatus.Up ||
netInterface.OperationalStatus == OperationalStatus.Unknown) &&
(netInterface.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 ||
netInterface.NetworkInterfaceType == NetworkInterfaceType.Ethernet))
{
foreach (var d in netInterface.GetIPProperties().UnicastAddresses)
{
if (d.Address.AddressFamily == AddressFamily.InterNetwork)
{
var ipAddress = d.Address;
if (ipAddress.ToString().Contains("."))
{
localSubNet.Add(ipAddress.ToString().Remove(ipAddress.ToString().LastIndexOf('.')));
Debug.LogFormat("localSubNet.Add({0}) ipAddress={1}",ipAddress.ToString().Remove(ipAddress.ToString().LastIndexOf('.')), ipAddress);
}
}
}
}
}
UdpClient Client = new UdpClient();
IPEndPoint foundEndpoint = new IPEndPoint(IPAddress.Any, 0);
bool found = false;
foreach (string s in localSubNet)
{
Debug.Log("InitSend " + s + ".255");
Client.Send(new byte[1], 1, new IPEndPoint(IPAddress.Parse(s + ".255"), port));
}
int counter = 0;
do
{
if (Client.Available != 0)
{
Client.Receive(ref foundEndpoint);
found = true;
break;
}
if (counter++ > listenWaitTime / 50)
break;
yield return new WaitForSeconds(0.05f);
foreach (string s in localSubNet)
{
Debug.Log(counter + " " + s + ".255");
Client.Send(new byte[1], 1, new IPEndPoint(IPAddress.Parse(s + ".255"), port));
}
} while (true);
Client.Close();
Debug.Log("found=" + found);
if (found)
{
Debug.Log(foundEndpoint);
}
}
192.168.1.255 感觉被路由器给屏蔽了，在Mac上ping只返回自己电脑的ip，在Windows上ping返回超时。所以该用下面的方法自己遍历一边IP
客户端
using UnityEngine;
using System.Collections;
using System.Net.NetworkInformation;
using System.Net;
using System.Collections.Generic;
using System.Net.Sockets;
using System;
using System.Text;
public class GetLanHost : MonoBehaviour
{
public ushort port = 80;
public int listenWaitTime = 1000;
void Start ()
{
StartCoroutine(LanDiscovery(port, listenWaitTime));
}
public static IEnumerator LanDiscovery(ushort port, int listenWaitTime)
{
List<string> localSubNet = new List<string>();
NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces();
foreach (var netInterface in interfaces)
{
if ((netInterface.OperationalStatus == OperationalStatus.Up ||
netInterface.OperationalStatus == OperationalStatus.Unknown) &&
(netInterface.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 ||
netInterface.NetworkInterfaceType == NetworkInterfaceType.Ethernet))
{
foreach (var d in netInterface.GetIPProperties().UnicastAddresses)
{
if (d.Address.AddressFamily == AddressFamily.InterNetwork)
{
var ipAddress = d.Address;
if (ipAddress.ToString().Contains("."))
{
localSubNet.Add(ipAddress.ToString());
}
}
}
}
}
if (localSubNet.Count > 1)
{
for(int i = localSubNet.Count - 1; i >= 0; i --)
{
string[] arr = localSubNet[i].Split('.');
if (arr.Length == 4 && arr[3] == "1")
{
localSubNet.RemoveAt(i);
}
}
}
UdpClient Client = new UdpClient();
IPEndPoint foundEndpoint = new IPEndPoint(IPAddress.Any, 0);
bool found = false;
List<string> foundList = new List<string>();
for(int j = 0; j < localSubNet.Count; j ++)
{
string s = localSubNet[j];
s = s.Remove(s.LastIndexOf('.'));
for(int i = 2; i < 255; i ++)
{
string ip = s + "." + i;
Byte[] sendBytes = Encoding.ASCII.GetBytes("1");
Client.Send(sendBytes, sendBytes.Length, new IPEndPoint(IPAddress.Parse(ip), port));
}
}
int counter = 0;
do
{
if (Client.Available != 0)
{
Client.Receive(ref foundEndpoint);
foundList.Add(foundEndpoint.ToString());
}
if (counter++ > listenWaitTime / 100)
break;
yield return new WaitForSeconds(0.1f);
} while (true);
Client.Close();
Debug.Log("foundList.Count=" + foundList.Count);
for(int i = 0; i < foundList.Count; i ++)
{
Debug.Log(foundList[i]);
}
}
}
服务器
using System;
using System.Net;
using System.Text;
using System.Net.Sockets;
namespace UdpServer
{
class MainClass
{
public static UdpClient ReceiveUdpClient;
///
/// 侦听端口名称
///
public static int PortName;
///
/// 本地地址
///
public static IPEndPoint LocalIPEndPoint;
///
/// 日志记录
///
public static StringBuilder Note_StringBuilder;
///
/// 本地IP地址
///
public static IPAddress MyIPAddress;
public static void Main (string[] args)
{
//获取本机可用IP地址
IPAddress[] ips = Dns.GetHostAddresses(Dns.GetHostName());
foreach (IPAddress ipa in ips) {
if (ipa.AddressFamily == AddressFamily.InterNetwork) {
Console.WriteLine (ipa.ToString());
string[] arr = ipa.ToString ().Split ('.');
if (arr.Length == 4 && (arr[2] == "1" || arr[2] == "0"))
{
MyIPAddress = ipa;
}
}
}
if (MyIPAddress == null) {
foreach (IPAddress ipa in ips) {
if (ipa.AddressFamily == AddressFamily.InterNetwork) {
MyIPAddress = ipa;//获取本地IP地址
break;
}
}
}
Note_StringBuilder = new StringBuilder();
PortName = 7999;
Console.WriteLine ("MyIPAddress=" + MyIPAddress.ToString());
Console.WriteLine ("PortName=" + PortName);
IPEndPoint local = new IPEndPoint(MyIPAddress, PortName);
ReceiveUdpClient = new UdpClient(local);
IPEndPoint remote = new IPEndPoint(IPAddress.Any, 0);
while (true)
{
try
{
//关闭udpClient 时此句会产生异常
byte[] receiveBytes = ReceiveUdpClient.Receive(ref remote);
string receiveMessage = Encoding.Default.GetString(receiveBytes, 0, receiveBytes.Length);
// receiveMessage = ASCIIEncoding.ASCII.GetString(receiveBytes, 0, receiveBytes.Length);
Console.WriteLine(string.Format("{0}来自{1}:{2}", DateTime.Now.ToString(), remote, receiveMessage));
try
{
if(receiveMessage == "1")
{
Byte[] sendBytes = Encoding.ASCII.GetBytes("ok");
ReceiveUdpClient.Send(sendBytes, sendBytes.Length, remote);
}
}
catch (Exception e)
{
}
//break;
}
catch
{
break;
}
}
}
}
}
截图
客户端截图
服务器截图
192.168.1.9 192.168.2.1 MyIPAddress=192.168.1.9 PortName=7999 2016/8/15 21:04:54来自192.168.1.9:57384:1