Don't require pairing when connecting to BLE on WinRT

If we are running on a Windows version with Creators Update or newer
(>=15063) we can use new bluetooth low energy API that allows us to
do device discovery without the requirement of having paired the
device.

Instead of connecting to the device and fetching its services, we can
use UUIDs from advertisement packages to get an initial service list.

By using that approach we can get rid of the pairing process in
'connectToDevice' and replace it with 'GetGattServicesAsync' if no
services are yet available. The old behavior was kept as a fallback for
the case where the device has already been paired.

If the backend is built with an older Windows Kit or the machine
running the application does not support the new API we fall back to
the old implementation which still requires pairing.

Task-number: QTBUG-58660
Change-Id: Ice262d4d993a0119efb8b6c8fe9a21830717569f
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

1 files changed, 40 insertions, 0 deletions

diff --git a/config.tests/winrt_btle_no_pairing/main.cpp b/config.tests/winrt_btle_no_pairing/main.cpp
new file mode 100644
index 00000000..665e357a
--- /dev/null
+++ b/config.tests/winrt_btle_no_pairing/main.cpp
@@ -0,0 +1,40 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtConnectivity module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <wrl.h>
+#include <windows.devices.bluetooth.h>
+
+#if defined(_WIN32) && defined(__INTEL_COMPILER)
+#error "Windows ICC fails to build the WinRT backend (QTBUG-68026)."
+#endif
+
+int main()
+{
+    (void)Microsoft::WRL::ComPtr<ABI::Windows::Devices::Bluetooth::GenericAttributeProfile::IGattDeviceService3>().Get();
+    return 0;
+}