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| ** This file is part of the examples of the QtSerialBus module. |
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| |
| #ifndef MODBUSTCPCLIENT_P_H |
| #define MODBUSTCPCLIENT_P_H |
| |
| #include "modbustcpclient.h" |
| |
| #include <QDebug> |
| #include <QModbusReply> |
| |
| #include <private/qmodbustcpclient_p.h> |
| |
| QT_USE_NAMESPACE |
| |
| class ModbusTcpClientPrivate : private QModbusTcpClientPrivate |
| { |
| Q_DECLARE_PUBLIC(ModbusTcpClient) |
| |
| public: |
| QModbusReply *enqueueRequest(const QModbusRequest &request, int, const QModbusDataUnit &unit, |
| QModbusReply::ReplyType type) override |
| { |
| auto writeToSocket = [this](const QModbusRequest &request) { |
| QByteArray buffer; |
| QDataStream output(&buffer, QIODevice::WriteOnly); |
| output << m_tId << m_pId << m_length << m_uId << request; |
| |
| qint64 writtenBytes = m_socket->write(buffer); |
| if (writtenBytes == -1 || writtenBytes < buffer.size()) { |
| Q_Q(ModbusTcpClient); |
| qDebug() << "Cannot write request to socket."; |
| q->setError(QModbusTcpClient::tr("Could not write request to socket."), |
| QModbusDevice::WriteError); |
| return false; |
| } |
| qDebug() << "Sent TCP ADU:" << buffer.toHex(); |
| qDebug() << "Sent TCP PDU:" << request << "with tId:" << Qt::hex << m_tId; |
| return true; |
| }; |
| |
| if (!writeToSocket(request)) |
| return nullptr; |
| |
| Q_Q(ModbusTcpClient); |
| auto reply = new QModbusReply(type, m_uId, q); |
| const auto element = QueueElement{reply, request, unit, m_numberOfRetries, |
| m_responseTimeoutDuration}; |
| m_transactionStore.insert(m_tId, element); |
| |
| q->connect(q, &QModbusClient::timeoutChanged, |
| element.timer.data(), QOverload<int>::of(&QTimer::setInterval)); |
| QObject::connect(element.timer.data(), &QTimer::timeout, q, [this, writeToSocket]() { |
| if (!m_transactionStore.contains(m_tId)) |
| return; |
| |
| QueueElement elem = m_transactionStore.take(m_tId); |
| if (elem.reply.isNull()) |
| return; |
| |
| if (elem.numberOfRetries > 0) { |
| elem.numberOfRetries--; |
| if (!writeToSocket(elem.requestPdu)) |
| return; |
| m_transactionStore.insert(m_tId, elem); |
| elem.timer->start(); |
| qDebug() << "Resend request with tId:" << Qt::hex << m_tId; |
| } else { |
| qDebug() << "Timeout of request with tId:" << Qt::hex << m_tId; |
| elem.reply->setError(QModbusDevice::TimeoutError, |
| QModbusClient::tr("Request timeout.")); |
| } |
| }); |
| element.timer->start(); |
| return reply; |
| } |
| |
| quint16 m_tId = 0; |
| quint16 m_pId = 0; |
| quint16 m_length = 0; |
| quint8 m_uId = 0; |
| }; |
| |
| #endif // MODBUSTCPCLIENT_P_H |