QTcpSocket显示网络错误，但ping通过

Question

我通过qtcpsocket与设备建立了连接。顺便说一下 Windows 10操作系统。当我连接到主机时，防火墙和Windows的安全性被禁用，连接通过。方法errorString向我推了一个未知错误，这意味着什么都没发生，但随着它发出信号socketError的时间，其含义为QAbstractSocket :: NetworkError（0x0007），这意味着“网络发生错误（例如，网络电缆意外发生）插入）”。 与设备ping通，但是当我尝试与其连接时，一段时间后我收到错误信号。

我的软件或操作系统中的主要问题在哪里？我该如何检查？

查看下面的所有代码：

// Get model of message for option
TcpConnectMessageModel *messageModel = dynamic_cast<TcpConnectMessageModel *>(_messageModel);
if (messageModel == nullptr)
{
    systemMessagesController->SendConnectResultMessage(deviceName, ConnectResult::WrongConnectMessage, errors);
    break;
}

// initializing data for connection
options = messageModel->GetOptions(message);
bool ok = false;           

// create socket and connect it with hostAddress и ip:
senderSocket = QTcpSocketPtr(new QTcpSocket());



// when connection succesful
if(!connect(senderSocket.data(), &QTcpSocket::connected,this, [=](){
            qDebug() << "Connect success" << "!" << senderSocket->errorString();
            systemMessagesController->SendConnectResultMessage(deviceName, ConnectResult::Success, errors);
            connected = true;
    }))
{
    errors << senderSocket->errorString();

    systemMessagesController->SendConnectResultMessage(deviceName, ConnectResult::WrongConnectMessage, errors);
}

//connected = true;
if(!connect(senderSocket.data(), QOverload<QAbstractSocket::SocketError>::of(&QAbstractSocket::error),
    [=](QAbstractSocket::SocketError socketError){
            QString tmp = senderSocket->errorString();
            //errors << tmp;
            systemMessagesController->SendDisconnectResultMessage(deviceName, DisconnectResult::Error, errors);
    }))
{
    errors << senderSocket->errorString();
    systemMessagesController->SendConnectResultMessage(deviceName, ConnectResult::WrongConnectMessage, errors);
    break;
}

// stop socket when disconnect received 
if(!connect(this, &TcpLinkAgent::finished,this, [=](){
            if(!connected) return;
            senderSocket->close();
            qDebug() << "disconnected success" << "!" << senderSocket->errorString();                        
            disconnect(senderSocket.data(), 0, 0, 0);                        
            // socket turned off succesfully:
            if (senderSocket->openMode() == QIODevice::NotOpen)
            {
                systemMessagesController->SendDisconnectResultMessage(deviceName, DisconnectResult::Success, errors);                            
                senderSocket.reset();
                connected = false;
            }
            else
            {
                QStringList errors;
                systemMessagesController->SendDisconnectResultMessage(deviceName, DisconnectResult::Error, errors);                            
            }
    }))
{
    errors << senderSocket->errorString();
    systemMessagesController->SendConnectResultMessage(deviceName, ConnectResult::WrongConnectMessage, errors);                
    break;
}


if (!connect(senderSocket.data(), &QTcpSocket::readyRead, this, &TcpLinkAgent::DataReadyHandler, Qt::ConnectionType::QueuedConnection))
{
    systemMessagesController->SendConnectResultMessage(deviceName, ConnectResult::WrongConnectMessage, errors);
    break;
}

senderSocket->connectToHost(QHostAddress(options.ip), options.port.toUInt());
//This lines showed that all ok.
QString tmp = senderSocket->errorString();