public override NatDevice AnalyseReceivedResponse(IPAddress localAddress, byte[] response, IPEndPoint endpoint)
{
// Convert it to a string for easy parsing
string dataString = null;
// No matter what, this method should never throw an exception. If something goes wrong
// we should still be in a position to handle the next reply correctly.
try
{
dataString = Encoding.UTF8.GetString(response);
DiscoveryResponseMessage message = new DiscoveryResponseMessage(dataString);
string serviceType = message["ST"];
if (!IsValidControllerService(serviceType))
{
NatDiscoverer.TraceSource.LogWarn("Invalid controller service. Ignoring.");
return(null);
}
NatDiscoverer.TraceSource.LogInfo("UPnP Response: Router advertised a '{0}' service!!!", serviceType);
string location = message["Location"] ?? message["AL"];
Uri locationUri = new Uri(location);
NatDiscoverer.TraceSource.LogInfo("Found device at: {0}", locationUri.ToString());
if (_devices.ContainsKey(locationUri))
{
NatDiscoverer.TraceSource.LogInfo("Already found - Ignored");
_devices[locationUri].Touch();
return(null);
}
// If we send 3 requests at a time, ensure we only fetch the services list once
// even if three responses are received
if (_lastFetched.ContainsKey(endpoint.Address))
{
DateTime last = _lastFetched[endpoint.Address];
if ((DateTime.Now - last) < TimeSpan.FromSeconds(20))
{
return(null);
}
}
_lastFetched[endpoint.Address] = DateTime.Now;
NatDiscoverer.TraceSource.LogInfo("{0}:{1}: Fetching service list", locationUri.Host, locationUri.Port);
UpnpNatDeviceInfo deviceInfo = BuildUpnpNatDeviceInfo(localAddress, locationUri);
UpnpNatDevice device;
lock (_devices)
{
device = new UpnpNatDevice(deviceInfo);
if (!_devices.ContainsKey(locationUri))
{
_devices.Add(locationUri, device);
}
}
return(device);
}
catch (Exception ex)
{
NatDiscoverer.TraceSource.LogError("Unhandled exception when trying to decode a device's response. ");
NatDiscoverer.TraceSource.LogError("Report the issue in https://github.com/lontivero/LiteNetLib4Mirror.Open.Nat/issues");
NatDiscoverer.TraceSource.LogError("Also copy and paste the following info:");
NatDiscoverer.TraceSource.LogError("-- beging ---------------------------------");
NatDiscoverer.TraceSource.LogError(ex.Message);
NatDiscoverer.TraceSource.LogError("Data string:");
NatDiscoverer.TraceSource.LogError(dataString ?? "No data available");
NatDiscoverer.TraceSource.LogError("-- end ------------------------------------");
}
return(null);
}
internal UpnpNatDevice(UpnpNatDeviceInfo deviceInfo)
{
Touch();
DeviceInfo = deviceInfo;
_soapClient = new SoapClient(DeviceInfo.ServiceControlUri, DeviceInfo.ServiceType);
}