Windows 10中的UDP问题。UWP [英] Problems with UDP in windows 10. UWP

问题描述

我遇到以下问题：
我正在使用UDP与本地网络中的2台不同计算机进行通信。

在一侧，我有一台Windows 7计算机安装了4.5框架。我正在使用带有以下代码的类System.Net
：

  public static void UDPWriter（）
 
 {
 
 Task.Run（async（）=> 
 
 {
 byte [] data = new byte [10000]; 
 IPEndPoint ipep =新IPEndPoint（IPAddress.Pars（ 192.168.0.16），5002）; 
 
套接字udpClient =新Socket（AddressFamily.InterNetwork，SocketType.Dgram，ProtocolType.Udp）; 
 
 
 udpClient.Connect（ipep）; 
 
而（true）
 
 {
等待Task.Delay（24）; 
字符串输入= packagetosend; 
数据= Encoding.ASCII.GetBytes（输入）; 
 var receiveResults = udpClient.Send（数据，SocketFlags.None）; 
 
 } 
 
}）； 
 
} 
  

另一方面，我正在使用Windows 10 Universal带有以下代码的应用：

 异步静态私有无效EnablerListener（）
 {
 //单击
 
 HostName主机名=新的HostName（ 192.168.0.16）; 
 listener = new DatagramSocket（）; 
 listener.Control.InboundBufferSizeInBytes = 10000; 
 
 
 listener.MessageReceived + = socket_MessageReceived; 
 
 
等待监听器。BindServiceNameAsync（ 5002）; 
 
} 
 
 static void socket_MessageReceived（DatagramSocket sender，DatagramSocketMessageReceivedEventArgs args）
 {
 
 //收到消息。将您的逻辑放在这里
 
} 
  

（我的理论是，比MTU少）我正确地收到了发送的邮件。

问题来自于我的udp软件包是零散的。当我发送1个分成4个的软件包（我在Wireshark中看到过）时，Windows 10软件什么也收不到。我曾尝试更改listener.Control.Donotfragment（也许我使用的是错误的），但它似乎无法正常工作。
UPDATE1：
在wireshark中，我收到以下消息：
超过了生存时间（超过了碎片重组的时间）仅在Wireshark中有一些软件包，有的则被成功地重组了（几乎所有）

解决方案

在UWP上使用环回的本地计算机IPC受限制。我最近遇到了这个问题。也许考虑使用不同的方法，例如应用程序间通信- https：// channel9。 msdn.com/Events/Build/2015/3-765

来自DatagramSocket示例：

<注意，使用IP回送地址的网络通信通常不能用于通用
Windows平台（UWP）应用程序与其他进程（不同的UWP
应用程序或桌面应用程序），因为这受到网络隔离的限制。
在
内允许使用IP环回地址进行网络通信，出于UWP应用中的通信目的，该过程相同。有关
的更多信息，请参见如何设置网络功能。

https://github.com/Microsoft/Windows-universal-samples/tree/master/Samples/DatagramSocket （朝底部）

I am having the following problem: I am communicating 2 different machines in local network with UDP.

In one side I have a Windows 7 machine with 4.5 framework installed. I am using the class System.Net with this code:

 public static void UDPWriter()

    {

        Task.Run(async () =>

        { 
            byte[] data = new byte[10000];
            IPEndPoint ipep = new IPEndPoint(IPAddress.Pars("192.168.0.16"), 5002);

            Socket udpClient = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);


            udpClient.Connect(ipep);

            while (true)

            {
                await Task.Delay(24);
                string input = packagetosend;
                data = Encoding.ASCII.GetBytes(input);
                var receivedResults = udpClient.Send(data, SocketFlags.None);

            }

        });

    }

In the other side I am working with a Windows 10 Universal App with this code:

   async static private void EnablerListener()
        {
            //Click

            HostName hostname = new HostName("192.168.0.16");
            listener = new DatagramSocket();
            listener.Control.InboundBufferSizeInBytes=10000;


            listener.MessageReceived += socket_MessageReceived;


            await listener.BindServiceNameAsync("5002");

        }

       static void socket_MessageReceived(DatagramSocket sender, DatagramSocketMessageReceivedEventArgs args)
        {

            // Message received. Place your logic here

        }

As soon as I send a "small" package ( my theory is that less than the MTU) I receive correctly what is sent.

The problem comes with I my udp package is fragmented. When I send 1 packages that is splitted in 4 ( I have seen it in Wireshark) the Windows 10 software do not receive anything. I have tried changing listener.Control.Donotfragment( maybe I am using it wrong) but it seems not working. UPDATE1: In wireshark I receive this message time-to-live exceeded (fragment reassembly time exceeded) Only some packages in Wireshark, others are succesfully reassembled ( almost all)

解决方案

Local machine IPC using Loopback on UWP is restricted. I recently ran in to this problem myself. Perhaps consider a different approach like App-to-App Communication - https://channel9.msdn.com/Events/Build/2015/3-765

From the DatagramSocket sample:

Note Network communications using an IP loopback address cannot normally be used for interprocess communication between a Universal Windows Platform (UWP) app and a different process (a different UWP app or a desktop app) because this is restricted by network isolation. Network communication using an IP loopback address is allowed within the same process for communication purposes in a UWP app. For more information, see How to set network capabilities.

https://github.com/Microsoft/Windows-universal-samples/tree/master/Samples/DatagramSocket (towards the bottom)

这篇关于Windows 10中的UDP问题。UWP的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！