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// Copyright (C) 2016 basysKom GmbH, opensource@basyskom.com
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// Qt-Security score:significant reason:default
#include <private/qopcuaclient_p.h>
#include <QtCore/qloggingcategory.h>
#include <QtOpcUa/qopcuaendpointdescription.h>
#include "qopcuaerrorstate.h"
QT_BEGIN_NAMESPACE
using namespace Qt::Literals::StringLiterals;
QOpcUaClientPrivate::QOpcUaClientPrivate(QOpcUaClientImpl *impl)
: QObjectPrivate()
, m_impl(impl)
, m_state(QOpcUaClient::Disconnected)
, m_error(QOpcUaClient::NoError)
, m_enableNamespaceArrayAutoupdate(false)
, m_namespaceArrayAutoupdateEnabled(false)
, m_namespaceArrayUpdateInterval(1000)
{
}
QOpcUaClientPrivate::~QOpcUaClientPrivate()
{
}
void QOpcUaClientPrivate::connectToEndpoint(const QOpcUaEndpointDescription &endpoint)
{
m_endpoint = endpoint;
m_impl->connectToEndpoint(endpoint);
}
void QOpcUaClientPrivate::disconnectFromEndpoint()
{
if (m_state != QOpcUaClient::Connected) {
qCWarning(QT_OPCUA) << "Closing a connection without being connected";
return;
}
setStateAndError(QOpcUaClient::Closing);
m_impl->disconnectFromEndpoint();
}
void QOpcUaClientPrivate::setStateAndError(QOpcUaClient::ClientState state,
QOpcUaClient::ClientError error)
{
Q_Q(QOpcUaClient);
// ensure that state and error transition are atomic before signal emission
bool stateChanged = false;
bool errorOccurred = false;
if (m_state != state) {
m_state = state;
stateChanged = true;
}
if (error != QOpcUaClient::NoError && m_error != error) {
errorOccurred = true;
}
m_error = error;
if (errorOccurred)
emit q->errorChanged(m_error);
if (stateChanged) {
emit q->stateChanged(m_state);
if (m_state == QOpcUaClient::Connected)
emit q->connected();
else if (m_state == QOpcUaClient::Disconnected)
emit q->disconnected();
}
// According to UPC-UA part 5, page 23, the server is allowed to change entries of the namespace
// array if there is no active session. This could invalidate the cached namespaces table.
if (state == QOpcUaClient::Disconnected) {
m_namespaceArray.clear();
}
}
bool QOpcUaClientPrivate::updateNamespaceArray()
{
if (m_state != QOpcUaClient::ClientState::Connected)
return false;
if (!m_namespaceArrayNode) {
m_namespaceArrayNode.reset(m_impl->node(u"ns=0;i=2255"_s));
if (!m_namespaceArrayNode)
return false;
QObjectPrivate::connect(m_namespaceArrayNode.data(), &QOpcUaNode::attributeRead, this, &QOpcUaClientPrivate::namespaceArrayUpdated);
}
return m_namespaceArrayNode->readAttributes(QOpcUa::NodeAttribute::Value);
}
QStringList QOpcUaClientPrivate::namespaceArray() const
{
return m_namespaceArray;
}
void QOpcUaClientPrivate::namespaceArrayUpdated(QOpcUa::NodeAttributes attr)
{
Q_Q(QOpcUaClient);
const QVariant value = m_namespaceArrayNode->attribute(QOpcUa::NodeAttribute::Value);
if (!(attr & QOpcUa::NodeAttribute::Value) || value.metaType().id() != QMetaType::QVariantList) {
m_namespaceArray.clear();
emit q->namespaceArrayUpdated(QStringList());
return;
}
QStringList updatedNamespaceArray(value.toList().size());
int index = 0;
const auto list = value.toList();
for (const auto &it : list)
updatedNamespaceArray[index++] = (it.toString());
if (updatedNamespaceArray != m_namespaceArray) {
m_namespaceArray = updatedNamespaceArray;
emit q->namespaceArrayChanged(m_namespaceArray);
}
emit q->namespaceArrayUpdated(m_namespaceArray);
}
void QOpcUaClientPrivate::setupNamespaceArrayMonitoring()
{
Q_Q(QOpcUaClient);
if (!m_namespaceArrayNode || m_state != QOpcUaClient::ClientState::Connected)
return;
if (!m_enableNamespaceArrayAutoupdate && m_namespaceArrayAutoupdateEnabled) {
m_namespaceArrayNode->disableMonitoring(QOpcUa::NodeAttribute::Value);
m_namespaceArrayAutoupdateEnabled = false;
return;
}
if (m_enableNamespaceArrayAutoupdate && !m_namespaceArrayAutoupdateEnabled) {
QOpcUaMonitoringParameters options;
options.setSubscriptionType(QOpcUaMonitoringParameters::SubscriptionType::Exclusive);
options.setMaxKeepAliveCount((std::numeric_limits<quint32>::max)() - 1);
options.setPublishingInterval(m_namespaceArrayUpdateInterval);
m_namespaceArrayAutoupdateEnabled = true;
QObject::connect(m_namespaceArrayNode.data(), &QOpcUaNode::enableMonitoringFinished, q,
[&] (QOpcUa::NodeAttribute, QOpcUa::UaStatusCode statusCode) {
if (statusCode == QOpcUa::Good) {
// Update interval member to the revised value from the server
m_namespaceArrayUpdateInterval = m_namespaceArrayNode->monitoringStatus(QOpcUa::NodeAttribute::Value).publishingInterval();
} else {
m_namespaceArrayAutoupdateEnabled = m_enableNamespaceArrayAutoupdate = false;
}
}
);
QObject::connect(m_namespaceArrayNode.data(), &QOpcUaNode::attributeUpdated, q,
[&] (QOpcUa::NodeAttribute attr, QVariant /*value*/) {
namespaceArrayUpdated(attr);
}
);
m_namespaceArrayNode->enableMonitoring(QOpcUa::NodeAttribute::Value, options);
}
}
void QOpcUaClientPrivate::setApplicationIdentity(const QOpcUaApplicationIdentity &identity)
{
m_applicationIdentity = identity;
}
QOpcUaApplicationIdentity QOpcUaClientPrivate::applicationIdentity() const
{
return m_applicationIdentity;
}
void QOpcUaClientPrivate::setPkiConfiguration(const QOpcUaPkiConfiguration &config)
{
m_pkiConfig = config;
}
QOpcUaPkiConfiguration QOpcUaClientPrivate::pkiConfiguration() const
{
return m_pkiConfig;
}
QT_END_NAMESPACE