KNX Group Communication Example

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#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);
    }
}