The following C# code works correctly on Vista, but fails on XP with:
SocketException: An invalid argument was supplied.
The ErrorCode is 10022.
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));
}
}
}
Any ideas?