WiFiDirect cppwinrt misplaced '}'

[orineman]

Which sample are you reporting a bug in?

WifiDirect/cppwinrt

Describe the bug

Listener fails to accept connection from an unpaired device.

To Reproduce Steps to reproduce the behavior:

Run the sample, start a listener using default settings, try to connect to it from an unpaired device.

Expected behavior

It should work the same as the C# sample and successfully connect.

Configuration

Any.

Additional context

The '}' currently at line 235 should be at line 182 in Scenario1_Advertiser.cpp. I.e. immediately before the following user notification:

rootPage.NotifyUser(L"Connecting to " + deviceName + L"...", NotifyType::StatusMessage);

See also Scenario1_Advertiser.xaml.cs in th C# sample which has identical flow.

[yanfangliu-google]

I also saw this problem. After you fixed it, do you get the GO and GC connected?

[orineman]

I believe so. I worked more with the C# sample. So see also #1399.

Best way of testing is to make sure the devices aren't already paired and get the C# sample working first.

Life will be better if you make this change to Scenario2_Connector.cpp at approx. line 78.

            deviceWatcher = DeviceInformation::CreateWatcher(deviceSelector, { L"System.Devices.WiFiDirect.InformationElements", L"System.Devices.Aep.CanPair", L"System.Devices.Aep.IsPaired" });

It will make it correctly report the pairing status for the device you are connecting to and stop it from trying to pair when already paired (which fails).

           co_await clientSocket.ConnectAsync(remoteHostName, ServerPortString);

is throwing an exception for me at the moment, but it does make the WiFi Direct connection, but I haven't run this code for a couple of months.

I let all the GO settings default and add "Push button" configuration methods on both sides. I suggest trying this first.

Note that the Advertiser only advertises for a couple of minutes and the Connector only looks for a few seconds. Once it says the enumeration is complete, you won't see any more devices until you stop/restart the watcher.

You are better off doing this:

        WiFiDirectDevice wiFiDevice = WiFiDirectDevice(nullptr);
        hstring selector = wiFiDevice.GetDeviceSelector(WiFiDirectDeviceSelectorType::AssociationEndpoint);

        co_await resume_background();
        DeviceInformationCollection devices = co_await DeviceInformation::FindAllAsync(
            selector,
            {
                L"System.Devices.Aep.CanPair",
                L"System.Devices.Aep.IsPaired",
                L"System.Devices.WiFiDirect.InformationElements"
            }
        );
        co_await winrt::resume_foreground(_queue);

every 30 seconds or so while you aren't suspended.

[yanfangliu-google]

@orineman After look at your reply and the link you mentioned, I realize that only GC needs to do DeviceInformationCustomPairing::PairAsync(...), then both side can get a valid IP address and ping each other. But the problem is that how to use WiFiDirectConfigurationMethod::DisplayPin and ProvidePin? PushButton is kind of unsafe. I don't see WiFiDirectConnectionParameters::PairingRequested call back handler get called at any situation. I mentioned this problem in issue #1406