public static bool TryConnect([NotNull] this Socket socket, [NotNull] EndPoint remoteEndpoint, int millisecondsTimeout)
{
socket = socket.ArgumentNotNull();
remoteEndpoint = remoteEndpoint.ArgumentNotNull();
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
using (var mre = new ManualResetEventSlim(false))
{
using (var sea = new SocketAsyncEventArgs()
{
RemoteEndPoint = remoteEndpoint, UserToken = mre
})
{
sea.Completed += (s, e) => ((ManualResetEventSlim)e.UserToken).Set();
var pending = socket.ConnectAsync(sea);
if (!pending || mre.Wait(millisecondsTimeout))
{
return(sea.SocketError == SocketError.Success);
}
Socket.CancelConnectAsync(sea); // this will close the socket!
// In case of time-out, ManualResetEventSlim is left un-disposed to avoid race conditions,
// letting SafeHandle's finalizer to do the cleanup.
return(false);
}
}
}
else
{
throw new PlatformNotSupportedException();
}
}
public static int BindToAnonymousPort([NotNull] this Socket socket, [NotNull] IPAddress address)
{
socket.ArgumentNotNull().Bind(new IPEndPoint(address.ArgumentNotNull(), 0));
return(((IPEndPoint)socket.LocalEndPoint).Port);
}