C# can';无法在windows 10 UWP中从android应用程序接收UDP广播 我正在使用Xamarin.forms和.net标准2为共享代码编写UWP和Android应用程序 我正在尝试从两个应用程序发送和接收UPD boradcast,但问题是我只能从android应用程序按预期发送和接收,而UWP应用程序无法接收UDP广播数据包 我在windows上安装了wireshark,它可以接收来自这两个应用程序的所有软件包 我为我的app.uwp.exe添加了防火墙规则(允许任何网络、任何端口、任何协议、任何ip),我重新启动了电脑,我的uwp应用程序仍然无法从android应用程序接收
守则:C# can';无法在windows 10 UWP中从android应用程序接收UDP广播 我正在使用Xamarin.forms和.net标准2为共享代码编写UWP和Android应用程序 我正在尝试从两个应用程序发送和接收UPD boradcast,但问题是我只能从android应用程序按预期发送和接收,而UWP应用程序无法接收UDP广播数据包 我在windows上安装了wireshark,它可以接收来自这两个应用程序的所有软件包 我为我的app.uwp.exe添加了防火墙规则(允许任何网络、任何端口、任何协议、任何ip),我重新启动了电脑,我的uwp应用程序仍然无法从android应用程序接收,c#,xamarin.forms,uwp,broadcast,udpclient,C#,Xamarin.forms,Uwp,Broadcast,Udpclient,守则: using System.Threading.Tasks; using Xamarin.Forms; using Xamarin.Forms.Xaml; using System.Net.Sockets; using System.Net; [XamlCompilation(XamlCompilationOptions.Compile)] public partial class ItemsPage : ContentPa
using System.Threading.Tasks;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using System.Net.Sockets;
using System.Net;
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class ItemsPage : ContentPage
{
public async static Task<String> UDP_receive()
{
var myUDP = new UdpClient(8888);
myUDP.EnableBroadcast = true;
var myResult = await myUDP.ReceiveAsync();
myUDP.Close();
return Encoding.ASCII.GetString(myResult.Buffer) + " : " + myResult.RemoteEndPoint.Address.ToString();
}
public async static Task UDP_Send()
{
var myUDP = new UdpClient();
var RequestData = Encoding.ASCII.GetBytes(DateTime.Now.ToLongTimeString());
myUDP.EnableBroadcast = true;
await myUDP.SendAsync(RequestData, RequestData.Length, new IPEndPoint(IPAddress.Broadcast, 8888));
myUDP.Close();
}
void Button1_click(object sender, EventArgs e)
{
StartListen();
StartSending();
}
async Task StartListen()
{
Exception eXX = null;
while (eXX == null)
{
try
{
myText.Text += Environment.NewLine + await UDP_receive();
}
catch (Exception ex2)
{
eXX = ex2;
log(ex2);
}
}
}
async Task StartSending()
{
Exception eXX = null;
while (eXX == null)
{
try
{
await MyData.UDP_Send();
await Task.Delay(1000);
}
catch (Exception ex2)
{
eXX = ex2;
log(ex2);
}
}
}
}
使用System.Threading.Tasks;
使用Xamarin.Forms;
使用Xamarin.Forms.Xaml;
使用System.Net.Sockets;
Net系统;
[XamlCompilation(XamlCompilationOptions.Compile)]
公共部分类项目页面:ContentPage
{
公共异步静态任务UDP_receive()
{
var myUDP=新的UdpClient(8888);
myUDP.EnableBroadcast=true;
var myResult=await myUDP.ReceiveAsync();
myUDP.Close();
返回Encoding.ASCII.GetString(myResult.Buffer)+“:”+myResult.RemoteEndPoint.Address.ToString();
}
公共异步静态任务UDP_Send()
{
var myUDP=新的UdpClient();
var RequestData=Encoding.ASCII.GetBytes(DateTime.Now.ToLongTimeString());
myUDP.EnableBroadcast=true;
等待myUDP.SendAsync(RequestData,RequestData.Length,新的IPEndPoint(IPAddress.Broadcast,8888));
myUDP.Close();
}
无效按钮1\u单击(对象发送者,事件参数e)
{
StartListen();
开始查找();
}
异步任务StartListen()
{
异常eXX=null;
while(eXX==null)
{
尝试
{
myText.Text+=Environment.NewLine+等待UDP_receive();
}
捕获(异常ex2)
{
eXX=ex2;
日志(ex2);
}
}
}
异步任务开始发送()
{
异常eXX=null;
while(eXX==null)
{
尝试
{
等待MyData.UDP_Send();
等待任务。延迟(1000);
}
捕获(异常ex2)
{
eXX=ex2;
日志(ex2);
}
}
}
}
Android输出:上午11:57:11:192.168.1.155
上午11:57:11:192.168.1.100
上午11:57:12:192.168.1.155
上午11:57:12:192.168.1.100
上午11:57:13:192.168.1.155
上午11:57:13:192.168.1.100
..
注意:192.168.1.100是Windows PC IP UWP输出:
上午11:57:11:192.168.1.100
上午11:57:12:192.168.1.100
上午11:57:13:192.168.1.100
上午11:57:14:192.168.1.100
上午11:57:15:192.168.1.100
.... 要接收UDP广播,请尝试将创建与绑定分离。比如说,
var myUDP = new UdpClient()
{
ExclusiveAddressUse = false,
EnableBroadcast = true
};
IPEndPoint localIPEndPoint = new IPEndPoint(myIP.BroadcastIPAddress, 8888);
myUDP.Client.Bind(localIPEndPoint);
根据我的经验,看起来像UdpClient(8888)这样的短形式构造函数过早地绑定了底层套接字。这将防止更改EnableBroadcast属性
另外,从一个平台到另一个平台,我发现接收广播的唯一可靠方法是使用子网的实际广播地址。如下图所示,很容易捕获这些信息
public class BroadcastAddress
{
public IPAddress IPAddress { get; set; }
public IPAddress BroadcastIPAddress { get; set; }
public NetworkInterfaceType NetworkInterfaceType { get; set; }
}
public static IEnumerable<BroadcastAddress> GetBroadcastAddresses()
{
List<BroadcastAddress> broadcastAddresses = new List<BroadcastAddress>();
NetworkInterface[] networkInterfaces = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface networkInterface in networkInterfaces)
{
if (networkInterface != null
&& (networkInterface.NetworkInterfaceType == NetworkInterfaceType.Wireless80211
|| networkInterface.NetworkInterfaceType == NetworkInterfaceType.Ethernet))
{
IPInterfaceProperties iPInterfaceProperties = networkInterface.GetIPProperties();
UnicastIPAddressInformationCollection unicastIPAddressInformationCollection = iPInterfaceProperties.UnicastAddresses;
foreach (UnicastIPAddressInformation unicastIPAddressInformation in unicastIPAddressInformationCollection)
{
if (unicastIPAddressInformation.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
IPAddress broadcastIPAddress =
new IPAddress(unicastIPAddressInformation.Address.Address | (UInt32.MaxValue ^ (UInt32)(unicastIPAddressInformation.IPv4Mask.Address)));
broadcastAddresses.Add(new BroadcastAddress()
{
IPAddress = unicastIPAddressInformation.Address,
BroadcastIPAddress = broadcastIPAddress,
NetworkInterfaceType = networkInterface.NetworkInterfaceType
});
}
}
}
}
return broadcastAddresses;
}
公共类广播地址
{
公共IPAddress IPAddress{get;set;}
公共IP地址广播IP地址{get;set;}
公共网络接口类型NetworkInterfaceType{get;set;}
}
公共静态IEnumerable GetBroadcastAddresses()
{
列表地址=新列表();
NetworkInterface[]networkInterfaces=NetworkInterface.GetAllNetworkInterfaces();
foreach(网络接口中的网络接口)
{
if(networkInterface!=null
&&(networkInterface.NetworkInterfaceType==NetworkInterfaceType.Wireless8021
||networkInterface.NetworkInterfaceType==NetworkInterfaceType.Ethernet)
{
IPInterfaceProperties IPInterfaceProperties=networkInterface.GetIPProperties();
UnicastIPAddressInformationCollection UnicastIPAddressInformationCollection=iPInterfaceProperties.UnicastAddresses;
foreach(UnicastIPAddressInformation UnicastIPAddressInformation集合中的UnicastIPAddressInformation UnicastIPAddressInformation)
{
if(unicastIPAddressInformation.Address.AddressFamily==System.Net.Sockets.AddressFamily.InterNetwork)
{
IP地址广播IP地址=
新的IPAddress(unicastIPAddressInformation.Address.Address |(UInt32.MaxValue^(UInt32)(unicastIPAddressInformation.IPv4Mask.Address));
broadcastAddresses.Add(新的BroadcastAddress()
{
IPAddress=unicastIPAddressInformation.Address,
广播IP地址=广播IP地址,
NetworkInterfaceType=networkInterface.NetworkInterfaceType
});
}
}
}
}
返回地址;
}
当您使用移动设备时,只需使用Wireless8021广播地址即可。在笔记本电脑或工作站上,它可能会变得稍微复杂一些。这些设备可以有多个网络接口和每个接口上的多个子网。因此,返回列表的原因是。这意味着您可能需要有多个UdpClient实例,每个子网一个
这对于OP来说可能太晚了。希望这些信息能帮助其他疲惫的搜索者让广播正常工作(以及