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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Copyright (C) 2014 Denis Shienkov <denis.shienkov@gmail.com>
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtBluetooth module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qwinlowenergybluetooth_p.h"
#include <QtCore/quuid.h>
#include <QtCore/qlibrary.h>
#include <QtCore/qglobal.h>
QT_BEGIN_NAMESPACE
namespace WinLowEnergyBluetooth {
#define DEFINEFUNC(ret, func, ...) \
typedef ret (WINAPI *fp_##func)(__VA_ARGS__); \
static fp_##func func;
#define RESOLVEFUNC(func) \
func = (fp_##func)resolveFunction(library, #func); \
if (!func) \
return false;
DEFINEFUNC(HRESULT, BluetoothGATTGetServices, HANDLE, USHORT, PBTH_LE_GATT_SERVICE, PUSHORT, ULONG)
DEFINEFUNC(HRESULT, BluetoothGATTGetIncludedServices, HANDLE, PBTH_LE_GATT_SERVICE, USHORT, PBTH_LE_GATT_SERVICE, PUSHORT, ULONG)
DEFINEFUNC(HRESULT, BluetoothGATTGetCharacteristics, HANDLE, PBTH_LE_GATT_SERVICE, USHORT, PBTH_LE_GATT_CHARACTERISTIC, PUSHORT, ULONG)
DEFINEFUNC(HRESULT, BluetoothGATTGetDescriptors, HANDLE, PBTH_LE_GATT_CHARACTERISTIC, USHORT, PBTH_LE_GATT_DESCRIPTOR, PUSHORT, ULONG)
DEFINEFUNC(HRESULT, BluetoothGATTGetCharacteristicValue, HANDLE, PBTH_LE_GATT_CHARACTERISTIC, ULONG, PBTH_LE_GATT_CHARACTERISTIC_VALUE, PUSHORT, ULONG)
DEFINEFUNC(HRESULT, BluetoothGATTGetDescriptorValue, HANDLE, PBTH_LE_GATT_DESCRIPTOR, ULONG, PBTH_LE_GATT_DESCRIPTOR_VALUE, PUSHORT, ULONG)
DEFINEFUNC(HRESULT, BluetoothGATTBeginReliableWrite, HANDLE, PBTH_LE_GATT_RELIABLE_WRITE_CONTEXT, ULONG)
DEFINEFUNC(HRESULT, BluetoothGATTEndReliableWrite, HANDLE, BTH_LE_GATT_RELIABLE_WRITE_CONTEXT, ULONG)
DEFINEFUNC(HRESULT, BluetoothGATTAbortReliableWrite, HANDLE, BTH_LE_GATT_RELIABLE_WRITE_CONTEXT, ULONG)
DEFINEFUNC(HRESULT, BluetoothGATTSetCharacteristicValue, HANDLE, PBTH_LE_GATT_CHARACTERISTIC, PBTH_LE_GATT_CHARACTERISTIC_VALUE, BTH_LE_GATT_RELIABLE_WRITE_CONTEXT, ULONG)
DEFINEFUNC(HRESULT, BluetoothGATTSetDescriptorValue, HANDLE, PBTH_LE_GATT_DESCRIPTOR, PBTH_LE_GATT_DESCRIPTOR_VALUE, ULONG)
DEFINEFUNC(HRESULT, BluetoothGATTRegisterEvent, HANDLE, BTH_LE_GATT_EVENT_TYPE, PVOID, PFNBLUETOOTH_GATT_EVENT_CALLBACK, PVOID, PHANDLE, ULONG)
DEFINEFUNC(HRESULT, BluetoothGATTUnregisterEvent, HANDLE, ULONG)
static inline QFunctionPointer resolveFunction(QLibrary *library, const char *func)
{
QFunctionPointer symbolFunctionPointer = library->resolve(func);
if (!symbolFunctionPointer)
qWarning("Cannot resolve '%s' in '%s'.", func, qPrintable(library->fileName()));
return symbolFunctionPointer;
}
static inline bool resolveFunctions(QLibrary *library)
{
if (!library->isLoaded()) {
library->setFileName(QStringLiteral("bluetoothapis"));
if (!library->load()) {
qWarning("Unable to load '%s' library.", qPrintable(library->fileName()));
return false;
}
}
RESOLVEFUNC(BluetoothGATTGetServices)
RESOLVEFUNC(BluetoothGATTGetIncludedServices)
RESOLVEFUNC(BluetoothGATTGetCharacteristics)
RESOLVEFUNC(BluetoothGATTGetDescriptors)
RESOLVEFUNC(BluetoothGATTGetCharacteristicValue)
RESOLVEFUNC(BluetoothGATTGetDescriptorValue)
RESOLVEFUNC(BluetoothGATTBeginReliableWrite)
RESOLVEFUNC(BluetoothGATTEndReliableWrite)
RESOLVEFUNC(BluetoothGATTAbortReliableWrite)
RESOLVEFUNC(BluetoothGATTSetCharacteristicValue)
RESOLVEFUNC(BluetoothGATTSetDescriptorValue)
RESOLVEFUNC(BluetoothGATTRegisterEvent)
RESOLVEFUNC(BluetoothGATTUnregisterEvent)
return true;
}
Q_GLOBAL_STATIC(QLibrary, bluetoothapis)
ServicesDiscoveryResult::ServicesDiscoveryResult()
: error(NO_ERROR)
{
}
static QString deviceRegistryProperty(
HDEVINFO deviceInfoHandle,
const PSP_DEVINFO_DATA deviceInfoData,
DWORD registryProperty)
{
DWORD propertyRegDataType = 0;
DWORD propertyBufferSize = 0;
QByteArray propertyBuffer;
while (!::SetupDiGetDeviceRegistryProperty(
deviceInfoHandle,
deviceInfoData,
registryProperty,
&propertyRegDataType,
reinterpret_cast<PBYTE>(propertyBuffer.data()),
propertyBuffer.size(),
&propertyBufferSize)) {
const DWORD error = ::GetLastError();
if (error != ERROR_INSUFFICIENT_BUFFER
|| (propertyRegDataType != REG_SZ
&& propertyRegDataType != REG_EXPAND_SZ)) {
return QString();
}
propertyBuffer.fill(0, propertyBufferSize * sizeof(WCHAR));
}
return QString::fromWCharArray(
reinterpret_cast<const wchar_t *>(propertyBuffer.constData()));
}
static QString deviceService(
HDEVINFO deviceInfoSet, PSP_DEVINFO_DATA deviceInfoData)
{
return deviceRegistryProperty(
deviceInfoSet, deviceInfoData, SPDRP_SERVICE);
}
static QStringList availableSystemServices(const GUID &deviceInterface)
{
const DWORD flags = DIGCF_PRESENT;
const HDEVINFO deviceInfoHandle = ::SetupDiGetClassDevs(
&deviceInterface, NULL, 0, flags);
if (deviceInfoHandle == INVALID_HANDLE_VALUE)
return QStringList();
SP_DEVINFO_DATA deviceInfoData;
::memset(&deviceInfoData, 0, sizeof(deviceInfoData));
deviceInfoData.cbSize = sizeof(deviceInfoData);
DWORD index = 0;
QStringList result;
while (::SetupDiEnumDeviceInfo(
deviceInfoHandle, index++, &deviceInfoData)) {
const QString service = deviceService(deviceInfoHandle, &deviceInfoData);
if (service.isEmpty())
continue;
result.append(service);
}
::SetupDiDestroyDeviceInfoList(deviceInfoHandle);
return result;
}
ServicesDiscoveryResult startDiscoveryOfPrimaryServices(
HANDLE hDevice)
{
ServicesDiscoveryResult result;
USHORT servicesCount = 0;
forever {
const HRESULT hr = BluetoothGATTGetServices(
hDevice,
result.services.count(),
result.services.isEmpty() ? NULL : &result.services[0],
&servicesCount,
BLUETOOTH_GATT_FLAG_NONE);
if (hr == HRESULT_FROM_WIN32(ERROR_MORE_DATA)) {
result.services.resize(servicesCount);
} else if (hr == S_OK) {
break;
} else {
result.error = ::GetLastError();
result.services.clear();
break;
}
}
return result;
}
bool isSupported()
{
static bool resolved = resolveFunctions(bluetoothapis());
return resolved;
}
bool hasLocalRadio()
{
const QStringList systemServices =
availableSystemServices(
QUuid("e0cbf06c-cd8b-4647-bb8a-263b43f0f974"));
return systemServices.contains(QStringLiteral("BthLEEnum"));
}
} // namespace WinLowEnergyBluetooth
QT_END_NAMESPACE
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