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customizing-new
giesCANne/connections/connectionwindow.cpp
T
RefuhrandClaude Opus 5 2c8f9c6c23 fix: skip saved connections this build cannot create 
CanConFactory::create() returns nullptr for a type the platform does not
support, and loadConnections() handed that straight to the model, which
appends it to the connection list unguarded. Every later iteration over that
list then dereferences it.

Reachable by carrying a settings file holding a gs_usb connection from
Windows to another platform, and by any saved type id the factory does not
recognise.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XZnuZJ7zc3e8hk6C8bGDZN
2026-08-03 13:12:52 +02:00

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#include <QCanBus>
#include <QNetworkDatagram>
#include <QThread>
#include "connectionwindow.h"
#include "mainwindow.h"
#include "helpwindow.h"
#include "ui_connectionwindow.h"
#include "connections/canconfactory.h"
#include "connections/canconmanager.h"
#include "canbus.h"
#include <QSettings>
#include <connections/newconnectiondialog.h>
ConnectionWindow::ConnectionWindow(QWidget *parent) :
QDialog(parent),
ui(new Ui::ConnectionWindow)
{
ui->setupUi(this);
setWindowFlags(Qt::Window);
QSettings settings;
qRegisterMetaType<CANBus>("CANBus");
qRegisterMetaType<const CANFrame *>("const CANFrame *");
qRegisterMetaType<const QList<CANFrame> *>("const QList<CANFrame> *");
//List of devices with details. None of it can be edited. connection type, serialbus type, port name, number of buses, status
connModel = new CANConnectionModel(this);
ui->tableConnections->setModel(connModel);
ui->tableConnections->setColumnWidth(0, 100);
ui->tableConnections->setColumnWidth(1, 100);
ui->tableConnections->setColumnWidth(2, 130);
ui->tableConnections->setColumnWidth(3, 70);
ui->tableConnections->setColumnWidth(4, 200);
QHeaderView *HorzHdr = ui->tableConnections->horizontalHeader();
HorzHdr->setStretchLastSection(true); //causes the data column to automatically fill the tableview
ui->textConsole->setEnabled(false);
ui->btnClearDebug->setEnabled(false);
ui->btnSendHex->setEnabled(false);
ui->btnSendText->setEnabled(false);
ui->lineSend->setEnabled(false);
if (settings.value("Main/SaveRestoreConnections", false).toBool())
{
/* load connection configuration */
loadConnections();
}
connect(ui->btnDisconnect, &QPushButton::clicked, this, &ConnectionWindow::handleRemoveConn);
connect(ui->btnSendHex, &QPushButton::clicked, this, &ConnectionWindow::handleSendHex);
connect(ui->btnSendText, &QPushButton::clicked, this, &ConnectionWindow::handleSendText);
connect(ui->ckEnableConsole, &QCheckBox::toggled, this, &ConnectionWindow::consoleEnableChanged);
connect(ui->btnClearDebug, &QPushButton::clicked, this, &ConnectionWindow::handleClearDebugText);
connect(ui->btnNewConnection, &QPushButton::clicked, this, &ConnectionWindow::handleNewConn);
connect(ui->btnResetConn, &QPushButton::clicked, this, &ConnectionWindow::handleResetConn);
connect(ui->tableConnections->selectionModel(), &QItemSelectionModel::currentRowChanged, this, &ConnectionWindow::currentRowChanged);
connect(ui->tabBuses, &QTabBar::currentChanged, this, &ConnectionWindow::currentTabChanged);
connect(ui->btnSaveBus, &QPushButton::clicked, this, &ConnectionWindow::saveBusSettings);
connect(ui->btnMoveUp, &QPushButton::clicked, this, &ConnectionWindow::moveConnUp);
connect(ui->btnMoveDown, &QPushButton::clicked, this, &ConnectionWindow::moveConnDown);
ui->cbBusSpeed->addItem("33333");
ui->cbBusSpeed->addItem("50000");
ui->cbBusSpeed->addItem("83333");
ui->cbBusSpeed->addItem("100000");
ui->cbBusSpeed->addItem("125000");
ui->cbBusSpeed->addItem("250000");
ui->cbBusSpeed->addItem("500000");
ui->cbBusSpeed->addItem("1000000");
//ui->cbBusSpeed->addItem("75000");
//ui->cbBusSpeed->addItem("166666");
//ui->cbBusSpeed->addItem("233333");
//ui->cbBusSpeed->addItem("400000");
rxBroadcastGVRET = new QUdpSocket(this);
//Need to make sure it tries to share the address in case there are
//multiple instances of SavvyCAN running.
rxBroadcastGVRET->bind(QHostAddress::AnyIPv4, 17222, QAbstractSocket::ShareAddress);
connect(rxBroadcastGVRET, &QUdpSocket::readyRead, this, &ConnectionWindow::readPendingDatagrams);
//Doing the same for socketcand/kayak hosts:
rxBroadcastKayak = new QUdpSocket(this);
rxBroadcastKayak->bind(QHostAddress::AnyIPv4, 42000, QAbstractSocket::ShareAddress);
connect(rxBroadcastKayak, &QUdpSocket::readyRead, this, &ConnectionWindow::readPendingDatagrams);
}
void ConnectionWindow::readPendingDatagrams()
{
//qDebug() << "Got a UDP frame!";
while (rxBroadcastGVRET->hasPendingDatagrams()) {
QNetworkDatagram datagram = rxBroadcastGVRET->receiveDatagram();
if (!remoteDeviceIPGVRET.contains(datagram.senderAddress().toString()))
{
remoteDeviceIPGVRET.append(datagram.senderAddress().toString());
//qDebug() << "Add new remote IP " << datagram.senderAddress().toString();
}
}
while (rxBroadcastKayak->hasPendingDatagrams()) {
QNetworkDatagram datagram = rxBroadcastKayak->receiveDatagram();
//qDebug() << "Broadcast Datagram: " << QString::fromUtf8(datagram.data());
QXmlStreamReader CANBeaconXml(QString::fromUtf8(datagram.data()));
QString KayakHost;
QString KayakBus;
while(!CANBeaconXml.atEnd() && !CANBeaconXml.hasError())
{
CANBeaconXml.readNext();
if(CANBeaconXml.name() == QString("CANBeacon") && !CANBeaconXml.isEndElement())
KayakHost.append(CANBeaconXml.attributes().value("name"));
if(CANBeaconXml.name() == QString("URL"))
KayakHost.append(" (" + CANBeaconXml.readElementText() + ')');
//Kayak can theoretically send multiple busses over one ports
//TODO: implement this case in socketcand.cpp
if(CANBeaconXml.name() == QString("Bus") && !CANBeaconXml.isEndElement())
KayakBus.append(CANBeaconXml.attributes().value("name").toUtf8() + ",");
}
KayakHost = KayakBus.left(KayakBus.length() - 1) + "@" + KayakHost;
QVector<QString> connectedPorts;
if (connModel->rowCount() > 0)
{
for (int i = 0; i < connModel->rowCount(); i++)
{
CANConnection *var_conn = connModel->getAtIdx(i);
connectedPorts.append(var_conn->getPort());
}
}
if (connectedPorts.contains(KayakHost))
{
remoteDeviceKayak.removeOne(KayakHost);
}
if (!remoteDeviceKayak.contains(KayakHost) && !connectedPorts.contains(KayakHost))
{
remoteDeviceKayak.append(KayakHost);
//qDebug() << "Add new remote IP " << datagram.senderAddress().toString();
}
}
}
ConnectionWindow::~ConnectionWindow()
{
QList<CANConnection*>& conns = CANConManager::getInstance()->getConnections();
CANConnection* conn_p;
/* save configuration */
saveConnections();
/* delete connections */
while(!conns.isEmpty())
{
conn_p = conns.takeFirst();
conn_p->stop();
delete conn_p;
}
delete ui;
}
void ConnectionWindow::showEvent(QShowEvent* event)
{
QDialog::showEvent(event);
qDebug() << "Show connectionwindow";
installEventFilter(this);
readSettings();
ui->tableConnections->selectRow(0);
currentRowChanged(ui->tableConnections->currentIndex(), ui->tableConnections->currentIndex());
}
void ConnectionWindow::closeEvent(QCloseEvent *event)
{
Q_UNUSED(event);
removeEventFilter(this);
writeSettings();
}
bool ConnectionWindow::eventFilter(QObject *obj, QEvent *event)
{
if (event->type() == QEvent::KeyRelease) {
QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
switch (keyEvent->key())
{
case Qt::Key_F1:
HelpWindow::getRef()->showHelp("connectionwindow.md");
break;
}
return true;
} else {
// standard event processing
return QObject::eventFilter(obj, event);
}
//return false;
}
void ConnectionWindow::readSettings()
{
QSettings settings;
if (settings.value("Main/SaveRestorePositions", false).toBool())
{
resize(settings.value("ConnWindow/WindowSize", QSize(956, 665)).toSize());
move(Utility::constrainedWindowPos(settings.value("ConnWindow/WindowPos", QPoint(100, 100)).toPoint()));
}
}
void ConnectionWindow::writeSettings()
{
QSettings settings;
if (settings.value("Main/SaveRestorePositions", false).toBool())
{
settings.setValue("ConnWindow/WindowSize", size());
settings.setValue("ConnWindow/WindowPos", pos());
}
}
void ConnectionWindow::consoleEnableChanged(bool checked) {
ui->textConsole->setEnabled(checked);
ui->btnClearDebug->setEnabled(checked);
ui->btnSendHex->setEnabled(checked);
ui->btnSendText->setEnabled(checked);
ui->lineSend->setEnabled(checked);
int selIdx = ui->tableConnections->currentIndex().row();
if (selIdx == -1)
return;
CANConnection* conn_p = connModel->getAtIdx(selIdx);
if (checked) { //enable console
connect(conn_p, &CANConnection::debugOutput, this, &ConnectionWindow::getDebugText, Qt::UniqueConnection);
connect(this, &ConnectionWindow::sendDebugData, conn_p, &CANConnection::debugInput, Qt::UniqueConnection);
}
else { //turn it off
disconnect(conn_p, &CANConnection::debugOutput, nullptr, nullptr);
disconnect(this, &ConnectionWindow::sendDebugData, conn_p, &CANConnection::debugInput);
}
}
void ConnectionWindow::handleNewConn()
{
NewConnectionDialog *thisDialog = new NewConnectionDialog(&remoteDeviceIPGVRET, &remoteDeviceKayak);
CANCon::type newType;
QString newPort;
QString newDriver;
int newSerialSpeed;
int newBusSpeed;
bool newCanFd;
int newDataRate;
CANConnection *conn;
if (thisDialog->exec() == QDialog::Accepted)
{
newType = thisDialog->getConnectionType();
newPort = thisDialog->getPortName();
newDriver = thisDialog->getDriverName();
newSerialSpeed = thisDialog->getSerialSpeed();
newBusSpeed = thisDialog->getBusSpeed();
newCanFd=thisDialog->isCanFd();
newDataRate = thisDialog->getDataRate();
conn = create(newType, newPort, newDriver, newSerialSpeed, newBusSpeed, newCanFd, newDataRate);
if (conn)
{
connModel->add(conn);
ui->tableConnections->setCurrentIndex(connModel->index(connModel->rowCount() - 1, 1));
}
}
delete thisDialog;
}
void ConnectionWindow::handleRemoveConn()
{
int selIdx = ui->tableConnections->selectionModel()->currentIndex().row();
if (selIdx <0) return;
qDebug() << "remove connection at index: " << selIdx;
CANConnection* conn_p = connModel->getAtIdx(selIdx);
if(!conn_p) return;
/* remove connection from model & manager */
connModel->remove(conn_p);
/* stop and delete connection */
conn_p->stop();
delete conn_p;
/* select first connection in list */
ui->tableConnections->selectRow(0);
}
void ConnectionWindow::resetConnection(int idx)
{
QString port, driver;
CANCon::type type;
int serSpeed, busSpeed, dataRate;
bool canFd;
if (idx < 0) return;
qDebug() << "reset connection at index: " << idx;
CANConnection* conn_p = connModel->getAtIdx(idx);
if(!conn_p) return;
type = conn_p->getType();
port = conn_p->getPort();
driver = conn_p->getDriver();
serSpeed = 0; //TODO: implement these
busSpeed = 0;
dataRate = 0;
canFd = false;
/* stop and delete connection */
conn_p->stop();
conn_p = nullptr;
conn_p = create(type, port, driver, serSpeed, busSpeed,canFd,dataRate);
if (conn_p) connModel->replace(idx, conn_p);
}
void ConnectionWindow::handleResetConn()
{
int selIdx = ui->tableConnections->selectionModel()->currentIndex().row();
resetConnection(selIdx);
}
void ConnectionWindow::resetAllConnections()
{
qDebug() << "resetting all connections";
for (int i = 0; i < connModel->rowCount(); i++)
{
resetConnection(i);
}
}
/* status */
void ConnectionWindow::connectionStatus(CANConStatus pStatus)
{
Q_UNUSED(pStatus);
qDebug() << "Connectionstatus changed";
int selIdx = ui->tableConnections->selectionModel()->currentIndex().row();
connModel->refresh();
ui->tableConnections->selectRow(selIdx);
}
void ConnectionWindow::setSuspendAll(bool pSuspend)
{
QList<CANConnection*>& conns = CANConManager::getInstance()->getConnections();
foreach(CANConnection* conn_p, conns)
conn_p->suspend(pSuspend);
connModel->refresh();
}
void ConnectionWindow::saveBusSettings()
{
int selIdx = ui->tableConnections->currentIndex().row();
int offset = ui->tabBuses->currentIndex();
/* set parameters */
if (selIdx == -1) {
return;
}
else
{
CANConnection* conn_p = connModel->getAtIdx(selIdx);
CANBus bus;
if(!conn_p) return;
if (!conn_p->getBusSettings(offset, bus))
{
qDebug() << "Could not retrieve bus settings!";
return;
}
bus.setSpeed(ui->cbBusSpeed->currentText().toInt());
bus.setActive(ui->ckEnable->isChecked());
bus.setListenOnly(ui->ckListenOnly->isChecked());
bus.setCanFD(ui->canFDEnable->isChecked());
bus.setDataRate(ui->cbDataRate->currentText().toInt());
conn_p->setBusSettings(offset, bus);
}
}
void ConnectionWindow::populateBusDetails(int offset)
{
int selIdx = ui->tableConnections->currentIndex().row();
/* set parameters */
if (selIdx == -1) {
return;
}
else
{
//bool ret;
//int numBuses;
ui->canFDEnable->setVisible(false);
ui->canFDEnable_label->setVisible(false);
ui->dataRate_label->setVisible(false);
ui->cbDataRate->setVisible(false);
CANConnection* conn_p = connModel->getAtIdx(selIdx);
CANBus bus;
if(!conn_p) return;
if (!conn_p->getBusSettings(offset, bus))
{
qDebug() << "Could not retrieve bus settings!";
return;
}
//int busBase = CANConManager::getInstance()->getBusBase(conn_p);
//ui->lblBusNum->setText(QString::number(busBase + offset));
ui->ckListenOnly->setChecked(bus.isListenOnly());
ui->ckEnable->setChecked(bus.isActive());
if (conn_p->getType() == CANCon::type::SERIALBUS || conn_p->getType() == CANCon::type::LAWICEL
|| conn_p->getType() == CANCon::type::GS_USB)
{
ui->canFDEnable->setVisible(true);
ui->canFDEnable_label->setVisible(true);
ui->canFDEnable->setChecked(bus.isCanFD());
ui->cbDataRate->setVisible(true);
ui->dataRate_label->setVisible(true);
}
bool found = false;
for (int i = 0; i < ui->cbBusSpeed->count(); i++)
{
if (bus.getSpeed() == ui->cbBusSpeed->itemText(i).toInt())
{
found = true;
ui->cbBusSpeed->setCurrentIndex(i);
break;
}
}
if (!found) ui->cbBusSpeed->addItem(QString::number(bus.getSpeed()));
found = false;
for (int i = 0; i < ui->cbDataRate->count(); i++)
{
if (bus.getDataRate() == ui->cbDataRate->itemText(i).toInt())
{
found = true;
ui->cbDataRate->setCurrentIndex(i);
break;
}
}
if (!found) ui->cbDataRate->addItem(QString::number(bus.getDataRate()));
}
}
void ConnectionWindow::currentTabChanged(int newIdx)
{
populateBusDetails(newIdx);
}
void ConnectionWindow::currentRowChanged(const QModelIndex &current, const QModelIndex &previous)
{
int selIdx = current.row();
CANConnection* prevConn = connModel->getAtIdx(previous.row());
if(prevConn != nullptr)
disconnect(prevConn, &CANConnection::debugOutput, nullptr, nullptr);
disconnect(this, &ConnectionWindow::sendDebugData, nullptr, nullptr);
/* set parameters */
if (selIdx == -1) {
ui->groupBus->setEnabled(false);
return;
}
else
{
//bool ret;
ui->groupBus->setEnabled(true);
int numBuses;
CANConnection* conn_p = connModel->getAtIdx(selIdx);
if(!conn_p) return;
//because this might have already been setup during the initial setup so tear that one down and then create the normal one.
//disconnect(conn_p, &CANConnection::debugOutput, 0, 0);
numBuses = conn_p->getNumBuses();
int numB = ui->tabBuses->count();
for (int i = 0; i < numB; i++) ui->tabBuses->removeTab(0);
int busBase = CANConManager::getInstance()->getBusBase(conn_p);
/*if (numBuses > 1)*/ for (int i = 0; i < numBuses; i++) ui->tabBuses->addTab(QString::number(busBase + i));
populateBusDetails(0);
if (ui->ckEnableConsole->isChecked())
{
connect(conn_p, &CANConnection::debugOutput, this, &ConnectionWindow::getDebugText, Qt::UniqueConnection);
connect(this, &ConnectionWindow::sendDebugData, conn_p, &CANConnection::debugInput, Qt::UniqueConnection);
}
}
}
void ConnectionWindow::getDebugText(QString debugText) {
ui->textConsole->append(debugText);
}
void ConnectionWindow::handleClearDebugText() {
ui->textConsole->clear();
}
void ConnectionWindow::handleSendHex() {
QByteArray bytes;
QStringList tokens = ui->lineSend->text().split(' ');
foreach (QString token, tokens) {
bytes.append(token.toInt(nullptr, 16));
}
emit sendDebugData(bytes);
}
void ConnectionWindow::handleSendText() {
QByteArray bytes;
bytes = ui->lineSend->text().toLatin1();
bytes.append('\r'); //add carriage return for line ending
emit sendDebugData(bytes);
}
CANConnection* ConnectionWindow::create(CANCon::type pTye, QString pPortName, QString pDriver, int pSerialSpeed, int pBusSpeed, bool pCanFd, int pDataRate)
{
CANConnection* conn_p;
/* create connection */
conn_p = CanConFactory::create(pTye, pPortName, pDriver, pSerialSpeed, pBusSpeed, pCanFd, pDataRate);
if(conn_p)
{
/* connect signal */
connect(conn_p, &CANConnection::status, this, &ConnectionWindow::connectionStatus);
if (ui->ckEnableConsole->isChecked())
{
//set up the debug console to operate if we've selected it. Doing so here allows debugging right away during set up
connect(conn_p, &CANConnection::debugOutput, this, &ConnectionWindow::getDebugText, Qt::UniqueConnection);
}
/*TODO add return value and checks */
conn_p->start();
}
return conn_p;
}
void ConnectionWindow::loadConnections()
{
#if QT_VERSION < QT_VERSION_CHECK( 6, 0, 0 )
qRegisterMetaTypeStreamOperators<CANBus>();
qRegisterMetaTypeStreamOperators<QList<CANBus>>();
#endif
QSettings settings;
/* fill connection list */
QVector<QString> portNames = settings.value("connections/portNames").value<QVector<QString>>();
QVector<QString> driverNames = settings.value("connections/driverNames").value<QVector<QString>>();
QVector<int> devTypes = settings.value("connections/types").value<QVector<int>>();
QVector<int> busSpeeds = settings.value("connections/busSpeeds_0").value<QVector<int>>();
QVector<int> DataRates = settings.value("connections/DataRates_0").value<QVector<int>>();
QVector<int> isCanFds = settings.value("connections/isCanFds_0").value<QVector<int>>();
QVector<int> serialSpeeds = settings.value("connections/serialSpeeds").value<QVector<int>>();
//don't load the connections if the three setting arrays above aren't all the same size.
if (portNames.count() != driverNames.count() || devTypes.count() != driverNames.count() || busSpeeds.count() != driverNames.count() || isCanFds.count() != driverNames.count() ||
DataRates.count() != driverNames.count() || serialSpeeds.count() != driverNames.count() ) return;
for(int i = 0 ; i < portNames.count() ; i++)
{
CANConnection* conn_p = create((CANCon::type)devTypes[i], portNames[i], driverNames[i], serialSpeeds[i], busSpeeds[i], isCanFds[i] ? true : false, DataRates[i]);
/* the factory returns nothing for a connection type this build cannot create, for
* instance a gs_usb device in a settings file carried over from Windows */
if (!conn_p)
{
qDebug() << "Skipping saved connection of unsupported type" << devTypes[i] << portNames[i];
continue;
}
/* add connection to model */
connModel->add(conn_p);
}
if (connModel->rowCount() > 0) {
ui->tableConnections->selectRow(0);
}
}
void ConnectionWindow::saveConnections()
{
QList<CANConnection*>& conns = CANConManager::getInstance()->getConnections();
QSettings settings;
QVector<QString> portNames;
QVector<int> devTypes;
QVector<QString> driverNames;
QVector<int> serialSpeeds;
QVector<int> busSpeeds;
QVector<int> DataRates;
QVector<int> CanFds;
/* save connections */
foreach(CANConnection* conn_p, conns)
{ CANBus bus;
if (conn_p->getBusSettings(0, bus)) {
busSpeeds.append(bus.getSpeed());
CanFds.append(bus.isCanFD() ? 1 : 0);
DataRates.append(bus.getDataRate());
}
serialSpeeds.append(conn_p->getSerialSpeed());
portNames.append(conn_p->getPort());
devTypes.append(conn_p->getType());
driverNames.append(conn_p->getDriver());
}
settings.setValue("connections/portNames", QVariant::fromValue(portNames));
settings.setValue("connections/types", QVariant::fromValue(devTypes));
settings.setValue("connections/driverNames", QVariant::fromValue(driverNames));
settings.setValue("connections/busSpeeds_0", QVariant::fromValue(busSpeeds));
settings.setValue("connections/isCanFds_0", QVariant::fromValue(CanFds));
settings.setValue("connections/DataRates_0", QVariant::fromValue(DataRates));
settings.setValue("connections/serialSpeeds", QVariant::fromValue(serialSpeeds));
}
void ConnectionWindow::moveConnUp()
{
int selIdx = ui->tableConnections->selectionModel()->currentIndex().row();
if (selIdx > 0)
{
CANConnection* selConn = connModel->getAtIdx(selIdx);
CANConnection* prevConn = connModel->getAtIdx(selIdx - 1);
connModel->replace(selIdx - 1, selConn);
connModel->replace(selIdx, prevConn);
ui->tableConnections->selectRow(selIdx - 1);
}
}
void ConnectionWindow::moveConnDown()
{
int selIdx = ui->tableConnections->selectionModel()->currentIndex().row();
if (selIdx < connModel->rowCount() - 1)
{
CANConnection* selConn = connModel->getAtIdx(selIdx);
CANConnection* nextConn = connModel->getAtIdx(selIdx + 1);
connModel->replace(selIdx + 1, selConn);
connModel->replace(selIdx, nextConn);
ui->tableConnections->selectRow(selIdx + 1);
}
}
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