protected void RaiseDeviceFound(NatRouterDevice device)
{
CurrentSearchCancellationTokenSource?.Cancel();
_deviceFound(device);
}
async void Configure(NatRouterDevice device, int[] localUdpPorts)
{
try
{
Log_deepDetail($">> NatUtility.Configure(localUdpPorts={String.Join(";", localUdpPorts.Select(x=>x.ToString()))}) device={device}");
var externalIP = await device.GetExternalIPAsync();
Log_deepDetail($"device={device}, externalIP={externalIP}");
if (externalIP == null)
{
return;
}
if (externalIP.ToString() == "0.0.0.0")
{
return;
}
if (externalIP.ToString() == "127.0.0.1")
{
return;
}
var localUdpPortsHS = new HashSet <int>(localUdpPorts);
var existingMappings = await device.GetAllMappingsAsync();
foreach (var existingMapping in existingMappings)
{
if (existingMapping.Protocol == IpProtocol.Udp)
{
if (localUdpPortsHS.Contains(existingMapping.PrivatePort))
{
Log_deepDetail($"mapping already exists at router: {existingMapping.Description} {existingMapping.PrivatePort}-{existingMapping.PublicPort} {existingMapping.Protocol}");
localUdpPortsHS.Remove(existingMapping.PrivatePort);
}
else
{
try
{
Log_deepDetail($"deleting unused existing mapping: {existingMapping.Description} {existingMapping.PrivatePort}-{existingMapping.PublicPort} {existingMapping.Protocol}");
await device.DeletePortMappingAsync(existingMapping);
}
catch (Exception exc)
{
Log_deepDetail($"could not delete existing unused mapping to UDP port {existingMapping.PrivatePort} at {device}: {exc.Message}");
}
}
}
}
if (localUdpPortsHS.Count == 0)
{
Log_higherLevelDetail($"no new mappings to create");
_succeeded = true;
return;
}
foreach (var localUdpPort in localUdpPortsHS)
{
try
{
var mapping2 = new Mapping(IpProtocol.Udp, localUdpPort, localUdpPort); // todo use public port = * (0)
try
{
await device.CreatePortMappingAsync(mapping2);
Log_higherLevelDetail($"successfully created mapping: externalIP={externalIP}, protocol={mapping2.Protocol}, publicPort={mapping2.PublicPort}, privatePort={mapping2.PrivatePort}");
_succeeded = true;
}
catch (MappingException exc)
{
Log_deepDetail($"first-trial error when adding port mapping to {device}: {exc.Message}. trying again...");
try
{
await device.DeletePortMappingAsync(mapping2);
await device.CreatePortMappingAsync(mapping2);
Log_higherLevelDetail($"successfully created mapping (2nd trial): externalIP={externalIP}, protocol={mapping2.Protocol}, publicPort={mapping2.PublicPort}, privatePort={mapping2.PrivatePort}");
_succeeded = true;
}
catch (MappingException exc2)
{
Log_mediumPain($"second-trial error when adding port {localUdpPort} mapping to {device}: {exc2.Message}");
}
}
}
catch (Exception exc)
{
Log_mediumPain($"error when creating mapping for port {localUdpPort} at NAT device {device}: {exc}");
}
}
// Try to retrieve confirmation on the port map we just created:
//try
//{
// var m = await device.GetSpecificMappingAsync(Dcomms.NAT.Protocol.Udp, 6020);
// WriteToLog_drpGeneral_guiActivity($"Verified Mapping: externalIP={externalIP}, protocol={m.Protocol}, publicPort={m.PublicPort}, privatePort={m.PrivatePort}");
//}
//catch (Exception exc)
//{
// WriteToLog_drpGeneral_guiActivity($"Couldn't verify mapping (GetSpecificMappingAsync failed): {exc}");
//}
}
catch (Exception exc)
{
Log_mediumPain($"error when configuring NAT device {device}: {exc}");
}
}
