private async Task <IEnumerable <NatDevice> > DiscoverAsync(PortMapper portMapper, bool onlyOne, CancellationTokenSource cts)
{
TraceSource.LogInfo("Start Discovery");
var searcherTasks = new List <Task <IEnumerable <NatDevice> > >();
if (portMapper.HasFlag(PortMapper.Upnp))
{
var upnpSearcher = new UpnpSearcher(new IPAddressesProvider());
upnpSearcher.DeviceFound += (sender, args) => { if (onlyOne)
{
cts.Cancel();
}
};
searcherTasks.Add(upnpSearcher.Search(cts.Token));
}
if (portMapper.HasFlag(PortMapper.Pmp))
{
var pmpSearcher = new PmpSearcher(new IPAddressesProvider());
pmpSearcher.DeviceFound += (sender, args) => { if (onlyOne)
{
cts.Cancel();
}
};
searcherTasks.Add(pmpSearcher.Search(cts.Token));
}
await Task.WhenAll(searcherTasks);
TraceSource.LogInfo("Stop Discovery");
var devices = searcherTasks.SelectMany(x => x.Result);
foreach (var device in devices)
{
var key = device.ToString();
NatDevice nat;
if (Devices.TryGetValue(key, out nat))
{
nat.Touch();
}
else
{
Devices.Add(key, device);
}
}
return(devices);
}
