KNX Group Communication Example

 /****************************************************************************
 **
 ** Copyright (C) 2019 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the QtKnx module.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** 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.
 **
 ** BSD License Usage
 ** Alternatively, you may use this file under the terms of the BSD license
 ** as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of The Qt Company Ltd nor the names of its
 **     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ******************************************************************************/

 #include "mainwindow.h"
 #include "ui_mainwindow.h"

 #include "deviceitem.h"
 #include "groupaddressvalidater.h"

 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
     , ui(new Ui::MainWindow)
 {
     ui->setupUi(this);
     ui->groupAddress->setValidator(new GroupAddressValidator);

     for (int i = 0; i < ui->communication->columnCount(); ++i)
         ui->communication->resizeColumnToContents(i);

     setupInterfaces();
     populateDatapointComboBox();

     connect(ui->actionExit, &QAction::triggered, this, &QApplication::quit);
     connect(ui->actionClear, &QAction::triggered, ui->communication, &QTreeWidget::clear);

     connect(&m_tunnel, &QKnxNetIpTunnel::connected, this, &MainWindow::onConnected);
     connect(&m_tunnel, &QKnxNetIpTunnel::disconnected, this, &MainWindow::onDisconnected);
     connect(&m_tunnel, &QKnxNetIpTunnel::frameReceived, this, &MainWindow::populateFrame);
     connect(&m_tunnel, &QKnxNetIpTunnel::errorOccurred, this, &MainWindow::onErrorOccurred);

     connect(ui->communication, &QTreeWidget::currentItemChanged, this,
         [&](QTreeWidgetItem *current, QTreeWidgetItem * /* previuos */) {
             m_current = current;
     });

     m_discoveryAgent.setTimeout(-1);
     m_discoveryAgent.setSearchFrequency(6);
     m_discoveryAgent.setDiscoveryMode(QKnxNetIpServerDiscoveryAgent::DiscoveryMode::CoreV1
         | QKnxNetIpServerDiscoveryAgent::DiscoveryMode::CoreV2);
     connect(&m_discoveryAgent, &QKnxNetIpServerDiscoveryAgent::deviceDiscovered,
         this, &MainWindow::onDeviceDiscovered);

     m_discoveryAgent.start();
 }

 MainWindow::~MainWindow()
 {
     m_discoveryAgent.stop();

     delete ui;
     ui = nullptr;
     delete m_device;
 }

 void MainWindow::onConnected()
 {
     toggleUi(true);
     ui->connection->setText(tr("Disconnect"));

     m_last = new QTreeWidgetItem(ui->communication, m_last);
     m_last->setText(0, tr("Successfully connected to: %1 (%2 : %3)")
         .arg(m_device->info().deviceName())
         .arg(m_device->info().controlEndpointAddress().toString())
         .arg(m_device->info().controlEndpointPort()));
     m_last->setFirstColumnSpanned(true);
 }

 void MainWindow::onDisconnected()
 {
     toggleUi(false);
     ui->connection->setText(tr("Connect"));

     m_last = new QTreeWidgetItem(ui->communication, m_last);
     m_last->setText(0, tr("Successfully disconnected from: %1 (%2 : %3)")
         .arg(m_device->info().deviceName())
         .arg(m_device->info().controlEndpointAddress().toString())
         .arg(m_device->info().controlEndpointPort()));
     m_last->setFirstColumnSpanned(true);
 }

 void MainWindow::onDeviceDiscovered(QKnxNetIpServerInfo info)
 {
     if (ui->devices->findText(info.deviceName()) == -1)
         qobject_cast<QStandardItemModel*>(ui->devices->model())->appendRow(new DeviceItem(info));

     if (m_tunnel.state() == QKnxNetIpTunnel::State::Disconnected)
         ui->devices->setEnabled(bool(ui->devices->count()));
 }

 void MainWindow::onErrorOccurred(QKnxNetIpEndpointConnection::Error error, QString errorString)
 {
     m_last = new QTreeWidgetItem(ui->communication, m_last);
     const auto metaEnum = QMetaEnum::fromType<QKnxNetIpEndpointConnection::Error>();
     m_last->setText(0, tr("Error occurred: %1 (%2).").arg(errorString)
         .arg(metaEnum.valueToKey(int(error))));
     m_last->setFirstColumnSpanned(true);
 }

 void MainWindow::on_actionImport_triggered()
 {
     const auto fileName = QFileDialog::getOpenFileName(this, tr("Import keyring file"),
         QStandardPaths::standardLocations(QStandardPaths::DesktopLocation).value(0),
         tr("KNX keyring file (*.knxkeys)"));

     if (fileName.isEmpty())
         return;

     bool ok;
     const auto password = QInputDialog::getText(this, tr("Import keyring file"),
         tr("Keyring file password:"), QLineEdit::Normal, {}, &ok);
     if (!ok || password.isEmpty())
         return;

     m_secureConfigs = QKnxNetIpSecureConfiguration::fromKeyring(QKnxNetIpSecureConfiguration
         ::Type::DeviceManagement, fileName, password.toUtf8(), true);
     for (auto &config : m_secureConfigs)
         config.setIndividualAddress({});

     m_secureConfigs += QKnxNetIpSecureConfiguration::fromKeyring(QKnxNetIpSecureConfiguration
         ::Type::Tunneling, fileName, password.toUtf8(), true);

     on_devices_currentIndexChanged(ui->devices->currentIndex());
 }

 void MainWindow::on_devices_currentIndexChanged(int index)
 {
     delete m_device;
     m_device = nullptr;
     ui->secureConfigs->clear();

     if (index >= 0) {
         const auto model = qobject_cast<QStandardItemModel*>(ui->devices->model());
         m_device = static_cast<DeviceItem *> (model->item(ui->devices->currentIndex()))->clone();
     }

     if (m_device) {
         const auto deviceInfo = m_device->info();
         for (int i = 0; i < m_secureConfigs.size(); ++i) {
             const auto &config = m_secureConfigs[i];
             if (deviceInfo.individualAddress() != config.host())
                 continue;

             const auto ia = config.individualAddress();
             ui->secureConfigs->addItem(tr("User ID: %1 (Individual Address: %2)")
                 .arg(config.userId())
                 .arg(ia.isValid() ? ia.toString() : tr("No specific address")), i);
         }
     } else {
         m_device = new DeviceItem({});
     }

     ui->secureConfigs->setEnabled(bool(ui->secureConfigs->count())
         && ui->secureSession->isChecked());
     ui->secureSession->setEnabled(bool(ui->secureConfigs->count()));
 }

 void MainWindow::on_datapointTypes_currentIndexChanged(int index)
 {
     ui->values->clear();

     const auto type = ui->datapointTypes->itemData(index).value<QKnxDatapointType::Type>();
     QScopedPointer<QKnxDatapointType> p(QKnxDatapointTypeFactory::instance().createType(type));
     if (p) {
         ui->values->addItem(p->minimumText(), p->minimum());
         ui->values->addItem(p->maximumText(), p->maximum());
     }
 }

 void MainWindow::on_sendRead_clicked()
 {
     const auto frame = QKnxLinkLayerFrame::builder()
         .setSourceAddress(m_tunnel.individualAddress())
         .setDestinationAddress({ QKnxAddress::Type::Group, ui->groupAddress->text() })
         .createFrame();

     populateFrame(frame);
     m_tunnel.sendFrame(frame);
 }

 void MainWindow::on_sendWrite_clicked()
 {
     const auto frame = QKnxLinkLayerFrame::builder()
         .setSourceAddress(m_tunnel.individualAddress())
         .setDestinationAddress({ QKnxAddress::Type::Group, ui->groupAddress->text() })
         .setTpdu({
             QKnxTpdu::TransportControlField::DataGroup,
             QKnxTpdu::ApplicationControlField::GroupValueWrite,
             QKnx1Bit(ui->values->currentData().toBool()).bytes()
         }).createFrame();

     populateFrame(frame);
     m_tunnel.sendFrame(frame);
 }

 void MainWindow::on_connection_clicked()
 {
     if (ui->devices->count() <= 0)
         return;

     if (m_tunnel.state() == QKnxNetIpTunnel::State::Connected)
         return m_tunnel.disconnectFromHost();

     const auto list = ui->interfaces->currentData().toStringList();
     m_tunnel.setLocalAddress(QHostAddress(list.first()));
     m_tunnel.setSerialNumber(QKnxByteArray::fromHex(list.last().toLatin1()));

     m_last = new QTreeWidgetItem(ui->communication, m_last);
     m_last->setText(0, tr("Establish connection to: %1 (%2 : %3)")
         .arg(m_device->info().deviceName())
         .arg(m_device->info().controlEndpointAddress().toString())
         .arg(m_device->info().controlEndpointPort()));
     m_last->setFirstColumnSpanned(true);

     if (ui->secureSession->isChecked()) {
         auto secureConfiguration = m_secureConfigs.value(ui->secureConfigs->currentData().toInt());
         secureConfiguration.setKeepSecureSessionAlive(true);
         m_tunnel.setSecureConfiguration(secureConfiguration);
         m_tunnel.connectToHostEncrypted(m_device->info().controlEndpointAddress(),
             m_device->info().controlEndpointPort());
     } else {
         m_tunnel.connectToHost(m_device->info().controlEndpointAddress(),
             m_device->info().controlEndpointPort(), QKnxNetIp::HostProtocol::UDP_IPv4);
     }
 }

 void MainWindow::setupInterfaces()
 {
     auto firstItem = new QStandardItem(tr("Interface: --Select One--"));
     qobject_cast<QStandardItemModel*>(ui->interfaces->model())->appendRow(firstItem);
     firstItem->setSelectable(false);

     const auto interfaces = QNetworkInterface::allInterfaces();
     for (const auto &iface : interfaces) {
         const auto addressEntries = iface.addressEntries();
         for (int j = 0; j < addressEntries.size(); j++) {
             const auto ip = addressEntries[j].ip();
             if (ip.isLoopback() || ip.toIPv4Address() == 0)
                 continue;
             ui->interfaces->addItem(iface.name() + ": " + ip.toString(),
                 QStringList { ip.toString(), iface.hardwareAddress().remove(QLatin1String(":")) });
         }
     }
     ui->interfaces->setCurrentIndex(bool(ui->interfaces->count()));

     connect(ui->interfaces, QOverload<int>::of(&QComboBox::currentIndexChanged), this, [&](int i) {
         if (i < 0)
             return;
         m_discoveryAgent.stop();
         ui->devices->clear();
         m_discoveryAgent.setLocalAddress(QHostAddress(ui->interfaces->currentData()
             .toStringList().first()));
         m_discoveryAgent.start();
     });
 }

 void MainWindow::toggleUi(bool value)
 {
     ui->groupAddress->setEnabled(value);
     ui->datapointTypes->setEnabled(value);
     ui->values->setEnabled(value);
     ui->sendRead->setEnabled(value);
     ui->sendWrite->setEnabled(value);
     ui->interfaces->setDisabled(value);
     ui->devices->setDisabled(value && bool(ui->devices->count()));
 }

 void MainWindow::populateDatapointComboBox()
 {
     const auto typeEnum = QMetaEnum::fromType<QKnxDatapointType::Type>();
     for (int i = 0; i < typeEnum.keyCount(); ++i) {
         const auto type = QKnxDatapointType::Type(typeEnum.value(i));
         if (type >= QKnxDatapointType::Type::Dpt2_1BitControlled)
             break;
         QScopedPointer<QKnxDatapointType> p(QKnxDatapointTypeFactory::instance().createType(type));
         if (p)
             ui->datapointTypes->addItem(p->description(), QVariant::fromValue(type));
     }
 }

 void MainWindow::populateFrame(const QKnxLinkLayerFrame &frame)
 {
     m_last = new QTreeWidgetItem(ui->communication, m_last);

     auto metaEnum = QMetaEnum::fromType<QKnxLinkLayerFrame::MessageCode>();
     m_last->setText(1, metaEnum.valueToKey(int(frame.messageCode())));
     m_last->setText(2, frame.sourceAddress().toString());
     m_last->setText(3, frame.destinationAddress().toString());

     const auto ctrl = frame.controlField();
     metaEnum = QMetaEnum::fromType<QKnxControlField::FrameFormat>();
     m_last->setText(4, metaEnum.valueToKey(int(ctrl.frameFormat())));
     metaEnum = QMetaEnum::fromType<QKnxControlField::Repeat>();
     m_last->setText(5, metaEnum.valueToKey(int(ctrl.repeat())));
     metaEnum = QMetaEnum::fromType<QKnxControlField::Broadcast>();
     m_last->setText(6, metaEnum.valueToKey(int(ctrl.broadcast())));
     metaEnum = QMetaEnum::fromType<QKnxControlField::Priority>();
     m_last->setText(7, metaEnum.valueToKey(int(ctrl.priority())));
     metaEnum = QMetaEnum::fromType<QKnxControlField::Acknowledge>();
     m_last->setText(8, metaEnum.valueToKey(int(ctrl.acknowledge())));
     metaEnum = QMetaEnum::fromType<QKnxControlField::Confirm>();
     m_last->setText(9, metaEnum.valueToKey(int(ctrl.confirm())));

     const auto extCtrl = frame.extendedControlField();
     m_last->setText(10, (extCtrl.destinationAddressType() == QKnxAddress::Type::Group
         ? tr("Group")
         : tr("Individual")));
     m_last->setText(11, QString::number(extCtrl.hopCount()));
     metaEnum = QMetaEnum::fromType<QKnxExtendedControlField::ExtendedFrameFormat>();
     m_last->setText(12, metaEnum.valueToKey(int(extCtrl.format())));

     auto tpdu = frame.tpdu();
     metaEnum = QMetaEnum::fromType<QKnxTpdu::TransportControlField>();
     m_last->setText(13, metaEnum.valueToKey(int(tpdu.transportControlField())));
     metaEnum = QMetaEnum::fromType<QKnxTpdu::ApplicationControlField>();
     m_last->setText(14, metaEnum.valueToKey(int(tpdu.applicationControlField())));

     auto bytes = tpdu.data().toHex();
     m_last->setText(15, QString::fromLatin1(bytes.toByteArray(), bytes.size()));

     bytes = frame.bytes().toHex();
     m_last->setText(16, QString::fromLatin1(bytes.toByteArray(), bytes.size()));

     if (m_current) {
         const auto region = ui->communication->viewport()->visibleRegion();
         const auto currentRect = ui->communication->visualItemRect(m_current);
         if (region.contains({ currentRect.left(), currentRect.top() - currentRect.height() })
             && region.contains(ui->communication->visualItemRect(m_last))) {
                 ui->communication->scrollToItem(m_last);
         }
     } else {
         ui->communication->scrollToItem(m_last);
     }
 }