private async Task DiscoveryLoop()
{
try
{
while (_shouldContinueDiscoveryTask)
{
try
{
// Blocks until a message returns on this socket from a remote host.
var udpReceiveResult = await _udpServer.ReceiveAsync();
if (IsDiscoveryEnabled && Protocol.ValidateDiscoveryRequest(udpReceiveResult.Buffer))
{
var response = Protocol.CreateDiscoveryResponseMessage(_port);
await _udpServer.SendAsync(response, response.Length, udpReceiveResult.RemoteEndPoint);
var discoveryRequestEventArgs = new DiscoveryRequestReceivedEventArgs(udpReceiveResult.RemoteEndPoint.ToString());
OnDiscoveryRequestReceived(discoveryRequestEventArgs);
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
await Task.Delay(DEFAULT_DELAY);
}
}
catch (Exception e)
{
throw new HubFailureException($"The {nameof(Hub)} found an unrecoverable problem with the discovery system and it has been disabled. {nameof(Hub)} should still work, but channels are not going to be able to discover this {nameof(Hub)} anymore. Error was: {e.Message}", e);
}
}
/// <summary>
/// Triggers a <see cref="DiscoveryRequestReceived"/> event.
/// </summary>
/// <param name="e">Event arguments.</param>
protected virtual void OnDiscoveryRequestReceived(DiscoveryRequestReceivedEventArgs e)
{
DiscoveryRequestReceived?.Invoke(this, e);
}
