Implemented Bluetooth Low Energy gatt service and characteristics discovery

Bluez v4.x does not have total support for LE devices, a new approach, using gatttool command was implemented.

Auto-tests and documentation will be in other commits.

Change-Id: Iee711cc111199e15956052eebb7593bd3a5e27c8
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>

1 files changed, 282 insertions, 0 deletions

diff --git a/src/bluetooth/qlowenergycontroller.cpp b/src/bluetooth/qlowenergycontroller.cpp
new file mode 100644
index 00000000..abba8edc
--- /dev/null
+++ b/src/bluetooth/qlowenergycontroller.cpp
@@ -0,0 +1,282 @@
+/***************************************************************************
+**
+** Copyright (C) 2013 BlackBerry Limited all rights reserved
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtBluetooth module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qlowenergycontroller.h"
+#include "qlowenergycontroller_p.h"
+#include "qlowenergyserviceinfo_p.h"
+#include "qlowenergycharacteristicinfo_p.h"
+#include "moc_qlowenergycontroller.cpp"
+
+QT_BEGIN_NAMESPACE
+/*!
+    \class QLowEnergyController
+    \inmodule QtBluetooth
+    \brief The QLowEnergyController class is used for connecting and reading data from LE device
+    services.
+
+    To read data contained in LE service characteristics, the LE device must be paired and turned on.
+    First, connect necessary signals from the class and then connect to service by passing the wanted service
+    to \l connectoToService() function. \l connected() signal will be emitted on success or \l error()
+    signal in case of failure. It is possible to get error message by calling errorString function
+    in QLowEnergyServiceInfo class.
+
+    In case of disconnecting from service, pass the wanted service to \l disconnectFromService()
+    function and \l disconnected signal will be emitted.
+
+    It is enough to use one instance of this class to connect to more service on more devices,
+    but it is not possible to create more QLowEnergyController classes and connect to same
+    service on the same LE device.
+
+
+    \sa QLowEnergyServiceInfo, QLowEnergyCharacteristicInfo
+*/
+
+/*!
+    \fn void QLowEnergyController::connected(const QLowEnergyServiceInfo &)
+
+    This signal is emitted when a LE service is connected, passing connected QLowEnergyServiceInfo
+    instance.
+
+    \sa connectToService(const QLowEnergyServiceInfo &leService)
+*/
+
+/*!
+    \fn void QLowEnergyController::error(const QLowEnergyServiceInfo &)
+
+    This signal is emitted when an error occurs.
+
+    \sa QLowEnergyServiceInfo::errorString()
+*/
+
+/*!
+    \fn void QLowEnergyController::disconnected(const QLowEnergyServiceInfo &)
+
+    Emits disconnected signal with disconnected LE service.
+*/
+
+/*!
+    \fn QLowEnergyController::valueChanged(const QLowEnergyCharacteristicInfo &)
+
+    Emits a signal when the characteristic value is changed. This signal is emitted
+    after calling \l enableNotifications(const QLowEnergyCharacteristicInfo &characteristic)
+    function.
+
+    \sa enableNotifications(const QLowEnergyCharacteristicInfo &characteristic)
+*/
+
+QLowEnergyControllerPrivate::QLowEnergyControllerPrivate()
+{
+
+}
+
+QLowEnergyControllerPrivate::~QLowEnergyControllerPrivate()
+{
+
+}
+
+void QLowEnergyControllerPrivate::_q_serviceConnected(const QBluetoothUuid &uuid)
+{
+    for (int i = 0; i < m_leServices.size(); i++) {
+        if (((QLowEnergyServiceInfo)m_leServices.at(i)).uuid() == uuid)
+            emit q_ptr->connected((QLowEnergyServiceInfo)m_leServices.at(i));
+
+    }
+}
+
+void QLowEnergyControllerPrivate::_q_serviceError(const QBluetoothUuid &uuid)
+{
+    for (int i = 0; i < m_leServices.size(); i++) {
+        if (((QLowEnergyServiceInfo)m_leServices.at(i)).uuid() == uuid)
+            emit q_ptr->error((QLowEnergyServiceInfo)m_leServices.at(i));
+    }
+}
+
+
+void QLowEnergyControllerPrivate::_q_valueReceived(const QBluetoothUuid &uuid)
+{
+     for (int i = 0; i < m_leServices.size(); i++) {
+         QList<QLowEnergyCharacteristicInfo> characteristics = m_leServices.at(i).getCharacteristics();
+         for (int j = 0; j < characteristics.size(); j++) {
+             if (characteristics.at(j).uuid() == uuid)
+                 emit q_ptr->valueChanged(characteristics.at(j));
+         }
+     }
+}
+
+
+
+void QLowEnergyControllerPrivate::_q_serviceDisconnected(const QBluetoothUuid &uuid)
+{
+    for (int i = 0; i < m_leServices.size(); i++) {
+        if (((QLowEnergyServiceInfo)m_leServices.at(i)).uuid() == uuid) {
+            QObject::disconnect(((QLowEnergyServiceInfo)m_leServices.at(i)).d_ptr.data(), SIGNAL(connectedToService(QBluetoothUuid)), q_ptr, SLOT(_q_serviceConnected(QBluetoothUuid)));
+            QObject::disconnect(((QLowEnergyServiceInfo)m_leServices.at(i)).d_ptr.data(), SIGNAL(error(QBluetoothUuid)), q_ptr, SLOT(_q_serviceError(QBluetoothUuid)));
+            QObject::disconnect(((QLowEnergyServiceInfo)m_leServices.at(i)).d_ptr.data(), SIGNAL(disconnectedFromService(QBluetoothUuid)), q_ptr, SLOT(_q_serviceDisconnected(QBluetoothUuid)));
+            emit q_ptr->disconnected((QLowEnergyServiceInfo)m_leServices.at(i));
+        }
+    }
+}
+
+void QLowEnergyControllerPrivate::connectService(const QLowEnergyServiceInfo &service)
+{
+    bool in = false;
+    if (service.isValid()) {
+        for (int i = 0; i < m_leServices.size(); i++) {
+            if (((QLowEnergyServiceInfo)m_leServices.at(i)).uuid() == service.uuid() && !((QLowEnergyServiceInfo)m_leServices.at(i)).isConnected()) {
+                in = true;
+                QObject::connect(m_leServices.at(i).d_ptr.data(), SIGNAL(connectedToService(QBluetoothUuid)), q_ptr, SLOT(_q_serviceConnected(QBluetoothUuid)));
+                QObject::connect(((QLowEnergyServiceInfo)m_leServices.at(i)).d_ptr.data(), SIGNAL(error(QBluetoothUuid)), q_ptr, SLOT(_q_serviceError(QBluetoothUuid)));
+                QObject::connect(((QLowEnergyServiceInfo)m_leServices.at(i)).d_ptr.data(), SIGNAL(disconnectedFromService(QBluetoothUuid)), q_ptr, SLOT(_q_serviceDisconnected(QBluetoothUuid)));
+                ((QLowEnergyServiceInfo)m_leServices.at(i)).d_ptr->registerServiceWatcher();
+                break;
+            }
+        }
+        if (!in) {
+            m_leServices.append(service);
+            QObject::connect(((QLowEnergyServiceInfo)m_leServices.last()).d_ptr.data(), SIGNAL(connectedToService(QBluetoothUuid)), q_ptr, SLOT(_q_serviceConnected(QBluetoothUuid)));
+            QObject::connect(((QLowEnergyServiceInfo)m_leServices.last()).d_ptr.data(), SIGNAL(error(QBluetoothUuid)), q_ptr, SLOT(_q_serviceError(QBluetoothUuid)));
+            QObject::connect(((QLowEnergyServiceInfo)m_leServices.last()).d_ptr.data(), SIGNAL(disconnectedFromService(QBluetoothUuid)), q_ptr, SLOT(_q_serviceDisconnected(QBluetoothUuid)));
+            ((QLowEnergyServiceInfo)m_leServices.last()).d_ptr->registerServiceWatcher();
+        }
+    }
+}
+
+void QLowEnergyControllerPrivate::disconnectService(const QLowEnergyServiceInfo &service)
+{
+    if (service.isValid()) {
+        for (int i = 0; i < m_leServices.size(); i++) {
+            if (((QLowEnergyServiceInfo)m_leServices.at(i)).uuid() == service.uuid() && service.isConnected()) {
+                ((QLowEnergyServiceInfo)m_leServices.at(i)).d_ptr->unregisterServiceWatcher();
+                break;
+            }
+        }
+    }
+    else {
+        for (int i = 0; i < m_leServices.size(); i++) {
+            if (((QLowEnergyServiceInfo)m_leServices.at(i)).isConnected()) {
+                ((QLowEnergyServiceInfo)m_leServices.at(i)).d_ptr->unregisterServiceWatcher();
+                break;
+            }
+        }
+    }
+}
+
+/*!
+    Construct a new QLowEnergyInfo object with the \a parent.
+*/
+QLowEnergyController::QLowEnergyController(QObject *parent):
+    QObject(parent), d_ptr(new QLowEnergyControllerPrivate)
+{
+    d_ptr->q_ptr = this;
+}
+
+QLowEnergyController::~QLowEnergyController()
+{
+
+}
+
+/*!
+    Returns the list of all Bluetooth LE Services that were added.
+*/
+QList<QLowEnergyServiceInfo> QLowEnergyController::services() const
+{
+    return d_ptr->m_leServices;
+}
+
+/*!
+    Connects to the given \a leService. If the given service is not valid, or if
+    the given service is already connected, nothing will happen.
+
+*/
+void QLowEnergyController::connectToService(const QLowEnergyServiceInfo &leService)
+{
+    d_ptr->connectService(leService);
+}
+
+
+/*!
+    Disconnects the given \a leService. If the given service was not connected, nothing will be done.
+
+    If the \a leService is not passed or it is invalid, all connected services will be disconnected.
+
+*/
+void QLowEnergyController::disconnectFromService(const QLowEnergyServiceInfo &leService)
+{
+    d_ptr->disconnectService(leService);
+}
+
+
+/*!
+    Enables receiving notifications from the given \a characteristic. If the service characteristic
+    does not belong to one of the services, nothing wil lbe done.
+
+    \sa addLeService
+*/
+void QLowEnergyController::enableNotifications(const QLowEnergyCharacteristicInfo &characteristic)
+{
+    for (int i = 0; i < d_ptr->m_leServices.size(); i++) {
+        for (int j = 0; j < d_ptr->m_leServices.at(i).getCharacteristics().size(); j++) {
+            if (d_ptr->m_leServices.at(i).getCharacteristics().at(j).uuid() == characteristic.uuid()) {
+                connect(d_ptr->m_leServices.at(i).getCharacteristics().at(j).d_ptr.data(), SIGNAL(notifyValue(QBluetoothUuid)), this, SLOT(_q_valueReceived(QBluetoothUuid)));
+                d_ptr->m_leServices.at(i).getCharacteristics().at(j).d_ptr->enableNotification();
+            }
+        }
+    }
+}
+
+/*!
+    Disables receiving notifications from the given \a characteristic. If the service characteristic
+    does not belong to one of the services, nothing wil lbe done.
+
+    \sa addLeService
+*/
+void QLowEnergyController::disableNotifications(const QLowEnergyCharacteristicInfo &characteristic)
+{
+    for (int i = 0; i < d_ptr->m_leServices.size(); i++) {
+        for (int j = 0; j < d_ptr->m_leServices.at(i).getCharacteristics().size(); j++) {
+            if (d_ptr->m_leServices.at(i).getCharacteristics().at(j).uuid() == characteristic.uuid()){
+                disconnect(d_ptr->m_leServices.at(i).getCharacteristics().at(j).d_ptr.data(), SIGNAL(notifyValue(QBluetoothUuid)), this, SLOT(_q_valueReceived(QBluetoothUuid)));
+                d_ptr->m_leServices.at(i).getCharacteristics().at(j).d_ptr->disableNotification();
+            }
+        }
+    }
+}
+QT_END_NAMESPACE