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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** 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 "qlowenergycontrollernew_p.h"
#include "qbluetoothsocket_p.h"
#include <QtCore/QLoggingCategory>
#include <QtBluetooth/QBluetoothSocket>
#include <bluetooth/bluetooth.h>
#include <bluetooth/uuid.h>
#define ATTRIBUTE_CHANNEL_ID 4
#define GATT_PRIMARY_SERVICE 0x2800
#define ATT_OP_READ_BY_GROUP_REQUEST 0x10
#define ATT_OP_READ_BY_GROUP_RESPONSE 0x11
QT_BEGIN_NAMESPACE
Q_DECLARE_LOGGING_CATEGORY(QT_BT_BLUEZ)
static inline QBluetoothUuid convert_uuid128(const uint128_t *p)
{
uint128_t dst_hostOrder, dst_bigEndian;
// Bluetooth LE data comes as little endian
// uuids are constructed using high endian
btoh128(p, &dst_hostOrder);
hton128(&dst_hostOrder, &dst_bigEndian);
// convert to Qt's own data type
quint128 qtdst;
memcpy(&qtdst, &dst_bigEndian, sizeof(uint128_t));
return QBluetoothUuid(qtdst);
}
void QLowEnergyControllerNewPrivate::connectToDevice()
{
setState(QLowEnergyControllerNew::ConnectingState);
if (l2cpSocket)
delete l2cpSocket;
l2cpSocket = new QBluetoothSocket(QBluetoothServiceInfo::L2capProtocol, this);
connect(l2cpSocket, SIGNAL(connected()), this, SLOT(l2cpConnected()));
connect(l2cpSocket, SIGNAL(disconnected()), this, SLOT(l2cpDisconnected()));
connect(l2cpSocket, SIGNAL(error(QBluetoothSocket::SocketError)),
this, SLOT(l2cpErrorChanged(QBluetoothSocket::SocketError)));
connect(l2cpSocket, SIGNAL(readyRead()), this, SLOT(l2cpReadyRead()));
l2cpSocket->d_ptr->isLowEnergySocket = true;
l2cpSocket->connectToService(remoteDevice, ATTRIBUTE_CHANNEL_ID);
}
void QLowEnergyControllerNewPrivate::l2cpConnected()
{
Q_Q(QLowEnergyControllerNew);
setState(QLowEnergyControllerNew::ConnectedState);
emit q->connected();
}
void QLowEnergyControllerNewPrivate::disconnectFromDevice()
{
setState(QLowEnergyControllerNew::ClosingState);
l2cpSocket->close();
}
void QLowEnergyControllerNewPrivate::l2cpDisconnected()
{
Q_Q(QLowEnergyControllerNew);
setState(QLowEnergyControllerNew::UnconnectedState);
emit q->disconnected();
}
void QLowEnergyControllerNewPrivate::l2cpErrorChanged(QBluetoothSocket::SocketError e)
{
switch (e) {
case QBluetoothSocket::HostNotFoundError:
setError(QLowEnergyControllerNew::UnknownRemoteDeviceError);
qCDebug(QT_BT_BLUEZ) << "The passed remote device address cannot be found";
break;
case QBluetoothSocket::NetworkError:
setError(QLowEnergyControllerNew::NetworkError);
qCDebug(QT_BT_BLUEZ) << "Network IO error while talking to LE device";
break;
case QBluetoothSocket::UnknownSocketError:
case QBluetoothSocket::UnsupportedProtocolError:
case QBluetoothSocket::OperationError:
case QBluetoothSocket::ServiceNotFoundError:
default:
// these errors shouldn't happen -> as it means
// the code in this file has bugs
qCDebug(QT_BT_BLUEZ) << "Unknown l2cp socket error: " << e << l2cpSocket->errorString();
setError(QLowEnergyControllerNew::UnknownError);
break;
}
setState(QLowEnergyControllerNew::UnconnectedState);
}
void QLowEnergyControllerNewPrivate::l2cpReadyRead()
{
Q_Q(QLowEnergyControllerNew);
const QByteArray response = l2cpSocket->readAll();
//qDebug() << response.size() << "data:" << response.toHex();
if (response.isEmpty())
return;
const quint8 command = response.constData()[0];
QLowEnergyHandle start = 0, end = 0;
switch (command) {
case ATT_OP_READ_BY_GROUP_RESPONSE:
{
const quint16 elementLength = response.constData()[1];
const quint16 numElements = (response.size() - 2) / elementLength;
//qDebug() << numElements << elementLength << response.size() - 2;
quint16 offset = 2;
const char *data = response.constData();
for (int i = 0; i < numElements; i++) {
start = bt_get_le16(&data[offset]);
end = bt_get_le16(&data[offset+2]);
QBluetoothUuid uuid;
if (elementLength == 6) //16 bit uuid
uuid = QBluetoothUuid(bt_get_le16(&data[offset+4]));
else if (elementLength == 20) //128 bit uuid
uuid = convert_uuid128((uint128_t *)&data[offset+4]);
//else -> do nothing
offset += elementLength;
//qDebug() << "Found uuid:" << uuid << "start handle:" << hex
// << start << "end handle:" << end;
HandlePair pair(start, end);
serviceList.insert(uuid, pair);
emit q->serviceDiscovered(uuid);
}
break;
}
default:
qCDebug(QT_BT_BLUEZ) << "Unknown packet: " << response.toHex();
}
if (end != 0xFFFF)
sendReadByGroupRequest(end+1, 0xFFFF);
else
emit q->discoveryFinished();
}
void QLowEnergyControllerNewPrivate::discoverServices()
{
sendReadByGroupRequest(0x0001, 0xFFFF);
}
void QLowEnergyControllerNewPrivate::sendReadByGroupRequest(
QLowEnergyHandle start, QLowEnergyHandle end)
{
//call for primary services
bt_uuid_t primary;
bt_uuid16_create(&primary, GATT_PRIMARY_SERVICE);
#define GRP_TYPE_REQ_SIZE 7
quint8 packet[GRP_TYPE_REQ_SIZE];
packet[0] = ATT_OP_READ_BY_GROUP_REQUEST;
bt_put_unaligned(htobs(start), (quint16 *) &packet[1]);
bt_put_unaligned(htobs(end), (quint16 *) &packet[3]);
bt_put_unaligned(htobs(primary.value.u16), (quint16 *) &packet[5]);
QByteArray data(GRP_TYPE_REQ_SIZE, Qt::Uninitialized);
memcpy(data.data(), packet, GRP_TYPE_REQ_SIZE);
//qDebug() << "Sending grp request" << hex << start << end;
qint64 result = l2cpSocket->write(data.constData(), GRP_TYPE_REQ_SIZE);
if (result == -1) {
qCDebug(QT_BT_BLUEZ) << "Cannot write ReadByGroupRequest";
setError(QLowEnergyControllerNew::NetworkError);
}
}
QT_END_NAMESPACE
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