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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtOpcUa module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later 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 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qopen62541client.h"
#include "qopen62541subscription.h"
#include <private/qopcuabackend_p.h>
#include <QtCore/qset.h>
#include <QtCore/qstring.h>
#include <QtCore/qtimer.h>
QT_BEGIN_NAMESPACE
class Open62541AsyncBackend : public QOpcUaBackend
{
Q_OBJECT
public:
Open62541AsyncBackend(QOpen62541Client *parent);
~Open62541AsyncBackend();
public Q_SLOTS:
void connectToEndpoint(const QOpcUaEndpointDescription &endpoint);
void disconnectFromEndpoint();
void requestEndpoints(const QUrl &url);
// Node functions
void browse(quint64 handle, UA_NodeId id, const QOpcUaBrowseRequest &request);
void readAttributes(quint64 handle, UA_NodeId id, QOpcUa::NodeAttributes attr, QString indexRange);
void writeAttribute(quint64 handle, UA_NodeId id, QOpcUa::NodeAttribute attrId, QVariant value, QOpcUa::Types type, QString indexRange);
void writeAttributes(quint64 handle, UA_NodeId id, QOpcUaNode::AttributeMap toWrite, QOpcUa::Types valueAttributeType);
void enableMonitoring(quint64 handle, UA_NodeId id, QOpcUa::NodeAttributes attr, const QOpcUaMonitoringParameters &settings);
void disableMonitoring(quint64 handle, QOpcUa::NodeAttributes attr);
void modifyMonitoring(quint64 handle, QOpcUa::NodeAttribute attr, QOpcUaMonitoringParameters::Parameter item, QVariant value);
void callMethod(quint64 handle, UA_NodeId objectId, UA_NodeId methodId, QList<QOpcUa::TypedVariant> args);
void resolveBrowsePath(quint64 handle, UA_NodeId startNode, const QList<QOpcUaRelativePathElement> &path);
void findServers(const QUrl &url, const QStringList &localeIds, const QStringList &serverUris);
void readNodeAttributes(const QList<QOpcUaReadItem> &nodesToRead);
void writeNodeAttributes(const QList<QOpcUaWriteItem> &nodesToWrite);
// Node management
void addNode(const QOpcUaAddNodeItem &nodeToAdd);
void deleteNode(const QString &nodeId, bool deleteTargetReferences);
void addReference(const QOpcUaAddReferenceItem &referenceToAdd);
void deleteReference(const QOpcUaDeleteReferenceItem &referenceToDelete);
// Subscription
QOpen62541Subscription *getSubscription(const QOpcUaMonitoringParameters &settings);
bool removeSubscription(UA_UInt32 subscriptionId);
void iterateClient();
void handleSubscriptionTimeout(QOpen62541Subscription *sub, QList<QPair<quint64, QOpcUa::NodeAttribute>> items);
void cleanupSubscriptions();
// Callbacks
static void asyncMethodCallback(UA_Client *client, void *userdata, UA_UInt32 requestId, void *response);
static void asyncTranslateBrowsePathCallback(UA_Client *client, void *userdata, UA_UInt32 requestId, void *response);
static void asyncAddNodeCallback(UA_Client *client, void *userdata, UA_UInt32 requestId, void *response);
static void asyncDeleteNodeCallback(UA_Client *client, void *userdata, UA_UInt32 requestId, void *response);
static void asyncAddReferenceCallback(UA_Client *client, void *userdata, UA_UInt32 requestId, void *response);
static void asyncDeleteReferenceCallback(UA_Client *client, void *userdata, UA_UInt32 requestId, void *response);
static void asyncReadCallback(UA_Client *client, void *userdata, UA_UInt32 requestId, void *response);
static void asyncWriteAttributesCallback(UA_Client *client, void *userdata, UA_UInt32 requestId, void *response);
static void asyncBrowseCallback(UA_Client *client, void *userdata, UA_UInt32 requestId, void *response);
static void asyncBatchReadCallback(UA_Client *client, void *userdata, UA_UInt32 requestId, void *response);
static void asyncBatchWriteCallback(UA_Client *client, void *userdata, UA_UInt32 requestId, void *response);
public:
UA_Client *m_uaclient;
QOpen62541Client *m_clientImpl;
bool m_useStateCallback;
quint32 m_clientIterateInterval;
quint32 m_asyncRequestTimeout;
private:
static void clientStateCallback(UA_Client *client,
UA_SecureChannelState channelState,
UA_SessionState sessionState,
UA_StatusCode connectStatus);
static void inactivityCallback(UA_Client *client);
static void open62541LogHandler(void *logContext, UA_LogLevel level, UA_LogCategory category,
const char *msg, va_list args);
QOpen62541Subscription *getSubscriptionForItem(quint64 handle, QOpcUa::NodeAttribute attr);
QOpcUaApplicationDescription convertApplicationDescription(UA_ApplicationDescription &desc);
UA_ExtensionObject assembleNodeAttributes(const QOpcUaNodeCreationAttributes &nodeAttributes, QOpcUa::NodeClass nodeClass);
UA_UInt32 *copyArrayDimensions(const QList<quint32> &arrayDimensions, size_t *outputSize);
// Helper
bool loadFileToByteString(const QString &location, UA_ByteString *target) const;
bool loadAllFilesInDirectory(const QString &location, UA_ByteString **target, int *size) const;
QTimer m_clientIterateTimer;
QHash<quint32, QOpen62541Subscription *> m_subscriptions;
QHash<quint64, QHash<QOpcUa::NodeAttribute, QOpen62541Subscription *>> m_attributeMapping; // Handle -> Attribute -> Subscription
double m_minPublishingInterval;
const UA_Logger m_open62541Logger {open62541LogHandler, nullptr, nullptr};
// Async contexts
struct AsyncCallContext {
quint64 handle;
QString methodNodeId;
};
QMap<quint32, AsyncCallContext> m_asyncCallContext;
struct AsyncTranslateContext {
quint64 handle;
QList<QOpcUaRelativePathElement> path;
};
QMap<quint32, AsyncTranslateContext> m_asyncTranslateContext;
struct AsyncAddNodeContext {
QOpcUaExpandedNodeId requestedNodeId;
};
QMap<quint32, AsyncAddNodeContext> m_asyncAddNodeContext;
struct AsyncDeleteNodeContext {
QString nodeId;
};
QMap<quint32, AsyncDeleteNodeContext> m_asyncDeleteNodeContext;
struct AsyncAddReferenceContext {
QString sourceNodeId;
QString referenceTypeId;
QOpcUaExpandedNodeId targetNodeId;
bool isForwardReference;
};
QMap<quint32, AsyncAddReferenceContext> m_asyncAddReferenceContext;
struct AsyncDeleteReferenceContext {
QString sourceNodeId;
QString referenceTypeId;
QOpcUaExpandedNodeId targetNodeId;
bool isForwardReference;
};
QMap<quint32, AsyncDeleteReferenceContext> m_asyncDeleteReferenceContext;
struct AsyncReadContext {
quint64 handle;
QList<QOpcUaReadResult> results;
};
QMap<quint32, AsyncReadContext> m_asyncReadContext;
struct AsyncWriteAttributesContext {
quint64 handle;
QOpcUaNode::AttributeMap toWrite;
};
QMap<quint32, AsyncWriteAttributesContext> m_asyncWriteAttributesContext;
struct AsyncBrowseContext {
quint64 handle;
bool isBrowseNext;
QList<QOpcUaReferenceDescription> results;
};
QMap<quint32, AsyncBrowseContext> m_asyncBrowseContext;
struct AsyncBatchReadContext {
QList<QOpcUaReadItem> nodesToRead;
};
QMap<quint32, AsyncBatchReadContext> m_asyncBatchReadContext;
struct AsyncBatchWriteContext {
QList<QOpcUaWriteItem> nodesToWrite;
};
QMap<quint32, AsyncBatchWriteContext> m_asyncBatchWriteContext;
};
QT_END_NAMESPACE
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