qt-everywhere-src-5.14.1/qtbase/examples/network/dnslookup/dnslookup.h

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#include <QDnsLookup>
#include <QHostAddress>

//! [0]

struct DnsQuery
{
    DnsQuery() : type(QDnsLookup::A) {}

    QDnsLookup::Type type;
    QHostAddress nameServer;
    QString name;
};

//! [0]

class DnsManager : public QObject
{
    Q_OBJECT

public:
    DnsManager();
    void setQuery(const DnsQuery &q) { query = q; }

public slots:
    void execute();
    void showResults();

private:
    QDnsLookup *dns;
    DnsQuery query;
};