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# qdns.h

This is the verbatim text of the qdns.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id: qt/qdns.h   3.3.4   edited Oct 28 2003 $
    **
    ** Definition of QDns class.
    **
    ** Created : 991122
    **
    ** Copyright (C) 1999-2000 Trolltech AS.  All rights reserved.
    **
    ** This file is part of the network module of the Qt GUI Toolkit.
    **
    ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** Licensees holding valid Qt Enterprise Edition licenses may use this
    ** file in accordance with the Qt Commercial License Agreement provided
    ** with the Software.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
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    **********************************************************************/

    #ifndef QDNS_H
    #define QDNS_H

    #ifndef QT_H
    #include "qobject.h"
    #include "qhostaddress.h"
    #include "qsocketnotifier.h"
    #include "qstringlist.h"
    #endif // QT_H

    #if !defined( QT_MODULE_NETWORK ) || defined( QT_LICENSE_PROFESSIONAL ) || defined( QT_INTERNAL_NETWORK )
    #define QM_EXPORT_DNS
    #else
    #define QM_EXPORT_DNS Q_EXPORT
    #endif

    #ifndef QT_NO_DNS

    //#define Q_DNS_SYNCHRONOUS

    class QDnsPrivate;

    class QM_EXPORT_DNS QDns: public QObject {
        Q_OBJECT
    public:
        enum RecordType {
    	None,
    	A, Aaaa,
    	Mx, Srv,
    	Cname,
    	Ptr,
    	Txt
        };

        QDns();
        QDns( const QString & label, RecordType rr = A );
        QDns( const QHostAddress & address, RecordType rr = Ptr );
        virtual ~QDns();

        // to set/change the query
        virtual void setLabel( const QString & label );
        virtual void setLabel( const QHostAddress & address );
        QString label() const { return l; }

        virtual void setRecordType( RecordType rr = A );
        RecordType recordType() const { return t; }

        // whether something is happening behind the scenes
        bool isWorking() const;

        // to query for replies
        QValueList<QHostAddress> addresses() const;

        class QM_EXPORT_DNS MailServer {
        public:
    	MailServer( const QString & n=QString::null, Q_UINT16 p=0 )
    	    :name(n), priority(p) {}
    	QString name;
    	Q_UINT16 priority;
    	Q_DUMMY_COMPARISON_OPERATOR(MailServer)
        };
        QValueList<MailServer> mailServers() const;

        class QM_EXPORT_DNS Server {
        public:
    	Server(const QString & n=QString::null, Q_UINT16 p=0, Q_UINT16 w=0, Q_UINT16 po=0 )
    	    : name(n), priority(p), weight(w), port(po) {}
    	QString name;
    	Q_UINT16 priority;
    	Q_UINT16 weight;
    	Q_UINT16 port;
    	Q_DUMMY_COMPARISON_OPERATOR(Server)
        };
        QValueList<Server> servers() const;

        QStringList hostNames() const;

        QStringList texts() const;

        QString canonicalName() const; // ### real-world but uncommon: QStringList

        QStringList qualifiedNames() const { return n; }

    #if defined(Q_DNS_SYNCHRONOUS)
    protected:
        void connectNotify( const char *signal );
    #endif

    signals:
        void resultsReady();

    private slots:
        void startQuery();

    private:
        static void doResInit();
        void setStartQueryTimer();
        static QString toInAddrArpaDomain( const QHostAddress &address );
    #if defined(Q_DNS_SYNCHRONOUS)
        void doSynchronousLookup();
    #endif

        QString l;
        QStringList n;
        RecordType t;
        QDnsPrivate * d;

        friend class QDnsAnswer;
        friend class QDnsManager;
    };

    // QDnsSocket are sockets that are used for DNS lookup

    class QDnsSocket: public QObject {
        Q_OBJECT
        // note: Private not public.  This class contains NO public API.
    protected:
        QDnsSocket( QObject *, const char * );
        virtual ~QDnsSocket();

    private slots:
        virtual void cleanCache();
        virtual void retransmit();
        virtual void answer();
    };

    #endif // QT_NO_DNS

    #endif // QDNS_H