public Task <PortResult> OpenPort(UPnPPort port)
{
return(Task.Run(async() =>
{
if (State == UPnPSupportState.NoPrepared)
{
return PortResult.EngineNotPrepared;
}
else if (State == UPnPSupportState.NotSupported)
{
return PortResult.EngineNotSupported;
}
else
{
try
{
PortResult opened = await CheckPort(port);
switch (opened)
{
case PortResult.Opened:
return PortResult.AlreadyOpened;
case PortResult.Closed:
switch (port.Type)
{
case PortType.TCP:
await device.CreatePortMapAsync(new Mapping(Protocol.Tcp, System.Net.IPAddress.Parse(Utils.GetLocalIP()), 100, 100, 0, port.Description));
await device.CreatePortMapAsync(new Mapping(Protocol.Tcp, port.InternalPort, port.ExternalPort, port.Description));
return PortResult.Opened;
case PortType.UDP:
await device.CreatePortMapAsync(new Mapping(Protocol.Udp, port.InternalPort, port.ExternalPort, port.Description));
return PortResult.Opened;
case PortType.BOTH:
await device.CreatePortMapAsync(new Mapping(Protocol.Tcp, port.InternalPort, port.ExternalPort, port.Description));
await device.CreatePortMapAsync(new Mapping(Protocol.Udp, port.InternalPort, port.ExternalPort, port.Description));
return PortResult.Opened;
default:
return PortResult.FailedUnknown;
}
default:
return PortResult.FailedUnknown;
}
}
catch (Exception)
{
return PortResult.FailedUnknown;
}
}
}));
}
public Task <UPnPSupportState> Prepare()
{
return(Task <UPnPSupportState> .Run(async() =>
{
try
{
manager = new UPnPNAT();
UPnPPort testPort = new UPnPPort(1, PortType.TCP, Utils.GetLocalIP());
PortResult result = await CheckPort(testPort);
switch (result)
{
case PortResult.Opened:
//No more checks needed
State = UPnPSupportState.Supported;
break;
case PortResult.Closed:
//Let us check if we are able to open and close the test port.
PortResult r = await OpenPort(testPort);
if (r == PortResult.Opened)
{
r = await ClosePort(testPort);
if (r == PortResult.Closed)
{
State = UPnPSupportState.Supported;
}
else
{
State = UPnPSupportState.NotSupported;
}
}
else
{
State = UPnPSupportState.NotSupported;
}
break;
default:
//Something went wrong
State = UPnPSupportState.NoPrepared;
break;
}
}
catch (Exception)
{
State = UPnPSupportState.NotSupported;
}
return State;
}));
}