c# - 在非管理员帐户上使用多个 PGM 监听套接字获取访问异常

Question

以下代码适用于管理员帐户，但对于非管理员帐户，它会打印两次成功然后抛出 System.Net.Sockets.SocketException (0x80004005):尝试以其禁止的方式访问套接字访问权限。任何人都知道这是为什么？

仅供引用，这里的实际用例是多个应用程序使用相同的 PGM 地址和套接字。推送(通过多播)实时更新。这不是由我们自己的库引起的概念证明。

class Program {
    static void Main(string[] args) {

        IPAddress ipAddr = IPAddress.Parse("239.0.0.2");
        IPEndPoint end = new IPEndPoint(ipAddr, 40002);
        Socket[] _sockets = new[] {
            new Socket(AddressFamily.InterNetwork, SocketType.Rdm, (ProtocolType)113 ),
            new Socket(AddressFamily.InterNetwork, SocketType.Rdm, (ProtocolType)113 ),
            new Socket(AddressFamily.InterNetwork, SocketType.Rdm, (ProtocolType)113 )
        };

        foreach (var socket in _sockets)
        {
            socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
            socket.Bind(end);
            Console.WriteLine("Success");
        }

        Console.ReadLine();
    }

Answer 1

好吧，我终于从微软那里得到了关于这个的消息，而且没有解决方法。

I was able to find the line where your request was denied.

[0] 22E8.1554::08/15/2012-10:05:19.015 [sys] address_c491 PgmCreateAddress() - PgmCreateAddress: ERROR -- Non-admin user trying to open 2+1 handle for IP:Port=

With a little code review, I was able to verify that only three principals are granted access, and they are Administrators, LocalService and NetworkService. Apart from being a member of Administrators, there is no workaround.

I know this wasn’t the answer you wanted to hear, but at least now you have a confirmed answer.