[Qt5] IP Address and MAC Address

.pro file

QT       += network

.cpp source file

#include 
#include 

    QString _MAC = "";
    QString _IP = "";
    
    QTcpSocket socket;
    socket.connectToHost("8.8.8.8", 53); // google DNS, or something else reliable
    if (socket.waitForConnected(3000)) {
//        qInfo() << socket.localAddress().toString();
        foreach(QNetworkInterface interface, QNetworkInterface::allInterfaces()){
            foreach (QNetworkAddressEntry entry, interface.addressEntries()){
                if(socket.localAddress().toString() == entry.ip().toString()){
                    qInfo() << socket.localAddress().toString() << " - " << interface.hardwareAddress();
                    _MAC = interface.hardwareAddress();
                    _IP = socket.localAddress().toString();
                }
            }
        }
    } else {
        qInfo() << socket.errorString();
    }

    socket.destroyed();