C#SocketException与XP上的多播 [英] C# SocketException with Multicast on XP
问题描述
以下C#代码在Vista上可以正常运行,但在具有以下功能的XP上无法运行:
The following C# code works correctly on Vista, but fails on XP with:
SocketException:提供了无效的参数.
SocketException: An invalid argument was supplied.
错误代码为10022.
The ErrorCode is 10022.
XP上的防火墙已被禁用.
The firewall on XP has been disabled.
using System;
using System.Net;
using System.Net.Sockets;
public class SocketTest
{
[STAThread]
public static void Main()
{
MySocket s = new MySocket();
Console.WriteLine("done");
Console.ReadLine();
}
public class MySocket : Socket
{
public const ushort SocketTtl = 4;
public const string Address = "239.255.255.250";
public IPAddress IPAddress = IPAddress.Parse(Address);
public MySocket()
: base(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp)
{
SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, true);
SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, SocketTtl);
// This line throws SocketException: An invalid argument was supplied
// SocketException.ErrorCode: 10022
SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(IPAddress));
}
}
}
有什么想法吗?
推荐答案
在设置SocketOptionName.AddMembership选项之前,您需要将套接字绑定到接口.
You need to bind the socket to an interface before setting the SocketOptionName.AddMembership option.
刚刚在MSDN文档中对此进行了验证(尽管它最多只显示NT4):
Just verified this in the MSDN docs (though it says only up to NT4):
Windows 98,Windows NT 4.0平台注意:在使用AddMembership作为optionName参数之前,必须调用Bind方法.
Windows 98, Windows NT 4.0 Platform Note: You must call the Bind method before using AddMembership as the optionName parameter.
这篇关于C#SocketException与XP上的多播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!