windows环境下基于QTc++和ONVIF协议写一个设备发现工具代码

这是一个基于QT C++和ONVIF协议的简单设备发现工具示例代码：

首先，你需要创建一个QT窗口应用程序，在mainwindow.h文件中添加以下头文件：

#include <QObject>
#include <QUdpSocket>
#include <QNetworkDatagram>
#include <QList>
#include <QDebug>
#include <QThread>
#include <QMutex>
#include <QWaitCondition>
#include <QTimer>
#include <QNetworkInterface>
#include <QNetworkAddressEntry>

然后在mainwindow.h文件中添加以下成员变量：

private:
    QUdpSocket *m_udpSocket;
    QList<QHostAddress> m_localAddresses;
    QList<QHostAddress> m_onvifAddresses;
    QList<QHostAddress> m_onvifDevices;
    QMutex m_mutex;
    QWaitCondition m_waitCondition;
    QTimer *m_timer;

在mainwindow.cpp文件中初始化成员变量：

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);

    // 初始化UDP套接字
    m_udpSocket = new QUdpSocket(this);
    connect(m_udpSocket, SIGNAL(readyRead()), this, SLOT(onReadyRead()));

    // 获取本地IP地址列表
    QList<QNetworkInterface> interfaces = QNetworkInterface::allInterfaces();
    foreach (QNetworkInterface interface, interfaces) {
        if (interface.flags().testFlag(QNetworkInterface::IsUp) && !interface.flags().testFlag(QNetworkInterface::IsLoopBack)) {
            QList<QNetworkAddressEntry> addressEntries = interface.addressEntries();
            foreach (QNetworkAddressEntry addressEntry, addressEntries) {
                if (addressEntry.ip().protocol() == QAbstractSocket::IPv4Protocol) {
                    m_localAddresses.append(addressEntry.ip());
                }
            }
        }
    }

    // 设置ONVIF协议的IP地址和端口
    m_onvifAddresses.append(QHostAddress("239.255.255.250"));
    m_onvifAddresses.append(QHostAddress("255.255.255.255"));
    m_onvifAddresses.append(QHostAddress("ff02::c"));
    m_onvifAddresses.append(QHostAddress("ff02::1"));
    m_onvifAddresses.append(QHostAddress("ff02::2"));

    // 初始化定时器
    m_timer = new QTimer(this);
    connect(m_timer, SIGNAL(timeout()), this, SLOT(onTimeout()));
}

接下来，实现onReadyRead()和onTimeout()函数：

void MainWindow::onReadyRead()
{
    QNetworkDatagram datagram = m_udpSocket->receiveDatagram();
    QHostAddress senderAddress = datagram.senderAddress();

    if (m_onvifAddresses.contains(senderAddress) && datagram.data().contains("urn:schemas-xmlsoap-org:device:")) {
        QString data = QString(datagram.data());
        QStringList lines = data.split("\r\n");

        QString deviceType, friendlyName, manufacturer, modelDescription, modelName, serialNumber, presentationURL;
        foreach (QString line, lines) {
            if (line.contains("urn:schemas-upnp-org:device:")) {
                deviceType = line;
            } else if (line.contains("friendlyName")) {
                friendlyName = line.split(":").at(1).trimmed();
            } else if (line.contains("manufacturer")) {
                manufacturer = line.split(":").at(1).trimmed();
            } else if (line.contains("modelDescription")) {
                modelDescription = line.split(":").at(1).trimmed();
            } else if (line.contains("modelName")) {
                modelName = line.split(":").at(1).trimmed();
            } else if (line.contains("serialNumber")) {
                serialNumber = line.split(":").at(1).trimmed();
            } else if (line.contains("presentationURL")) {
                presentationURL = line.split(":").at(1).trimmed();
            }
        }

        QString deviceInfo = QString("%1\n%2\n%3\n%4\n%5\n%6\n%7\n")
                .arg(senderAddress.toString())
                .arg(deviceType)
                .arg(friendlyName)
                .arg(manufacturer)
                .arg(modelDescription)
                .arg(modelName)
                .arg(serialNumber);

        m_mutex.lock();
        m_onvifDevices.append(senderAddress);
        m_mutex.unlock();
    }
}

void MainWindow::onTimeout()
{
    m_udpSocket->writeDatagram("M-SEARCH * HTTP/1.1\r\n"
                               "Host: 239.255.255.250:1900\r\n"
                               "Man: \"ssdp:discover\"\r\n"
                               "MX: 1\r\n"
                               "ST: urn:schemas-xmlsoap-org:device:NetworkVideoTransmitter:1\r\n\r\n",
                               QHostAddress("239.255.255.250"), 1900);
}

最后，在mainwindow.cpp文件的构造函数中启动定时器：

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);

    // ...

    // 启动定时器
    m_timer->start(5000);
}

这样，你就可以在windows环境下运行该设备发现工具，以查找ONVIF协议的设备并获取其IP地址和其他信息。