public void Initialize()
{
Logger.Info("Initializing networking");
while (true)
{
try {
_stunQuery = null;
CheckNatType();
if (_stunQuery != null)
{
break;
}
} catch (Exception e) {
Logger.Error("Unable to initialize networking! Retrying", e);
Thread.Sleep(5000);
}
}
if (_stunQuery.NetworkType == StunNetworkType.UdpBlocked)
{
Logger.Warn("First NAT detectiont return that UDP is fully blocked. Trying second time with timeout of 5 seconds ...");
Thread.Sleep(5000);
Initialize();
return;
}
_remoteEp = _stunQuery.PublicEndPoint;
var internalPort = ((IPEndPoint)_socket.LocalEndPoint).Port;
Logger.Debug($"P2P connections are listen as external {_stunQuery.PublicEndPoint.Address}:{_stunQuery.PublicEndPoint.Port}, local bind is {_bindEp.Address}:{internalPort}");
Logger.Info($"Bound local socket at {(IPEndPoint) _socket.LocalEndPoint}");
_portMapping = new Mapping(Protocol.Udp, internalPort, _stunQuery.PublicEndPoint.Port, $"RHMS Internal Peer {_connectionManager.GetSelfHostId()} Map");
Monitor.Enter(_natUpnpCreateLocker);
Task.Run(async() => {
try {
var discoverer = new NatDiscoverer();
var cts = new CancellationTokenSource(10000);
var device = await discoverer.DiscoverDeviceAsync(PortMapper.Upnp, cts);
await device.CreatePortMapAsync(_portMapping);
Logger.Info($"Created UPnP mapping {_portMapping}");
} catch (Exception e) {
Logger.Error("Unable to create UPnP mapping!", e);
}
}).Wait();
Monitor.Exit(_natUpnpCreateLocker);
NetworkStartAcceptingData();
}
private bool PerformNatQueryOn(string host, int port)
{
Logger.Debug($"Performing STUN query to {host}:{port}");
_stunQuery = StunQuery.Perform(_socket, host, port);
if (_stunQuery == null || _stunQuery.NetworkType == StunNetworkType.CommunicationError)
{
_stunQuery = null;
Logger.Debug($"STUN query to {host}:{port} failed with communication error");
return(false);
}
return(true);
}
