File indexing completed on 2024-04-21 03:43:43

 /*
     SPDX-FileCopyrightText: 2016 Alex Spataru
     SPDX-License-Identifier: MIT
 */
 
 #pragma once
 
 #include <QObject>
 
 class QHostInfo;
 class QUdpSocket;
 class QHostAddress;
 
 /**
  * \brief Implements a simple mDNS responder using Qt
  *
  * This implementation is able perform mDNS queries and mDNS responses in any
  * operating system supported by the Qt network module.
  *
  * You can obtain the IP of an mDNS device using the \c lookup() function,
  * the \c hostFound() signal will be emitted whenever this class interprets
  * a mDNS response packet and obtains valid information about a remote host.
  *
  * You can change the name that the local computer uses to identify itself
  * in the mDNS network using the \c setHostName() function.
  *
  * \todo Implement NSEC block code generation in the \c sendResponse() packet
  */
 class qMDNS : public QObject {
     Q_OBJECT
 
   signals:
     void hostFound (const QHostInfo& info);
 
   public:
     static qMDNS* getInstance();
 
     QString hostName() const;
     QString getAddress (const QString& string);
 
   protected:
     explicit qMDNS();
     ~qMDNS();
 
   public slots:
     void setTTL (const quint32 ttl);
     void lookup (const QString& name);
     void setHostName (const QString& name);
 
   private slots:
     void onReadyRead();
     void readQuery (const QByteArray& data);
     void sendPacket (const QByteArray& data);
     void readResponse (const QByteArray& data);
     void sendResponse (const quint16 query_id);
 
   private:
     QString getHostNameFromResponse (const QByteArray& data);
     QString getIPv4FromResponse (const QByteArray& data, const QString& host);
     QStringList getIPv6FromResponse (const QByteArray& data, const QString& host);
     QList<QHostAddress> getAddressesFromResponse (const QByteArray& data,
                                                   const QString& host);
 
   private:
     quint32 m_ttl;
     QString m_hostName;
     QString m_serviceName;
     QUdpSocket* m_IPv4Socket;
     QUdpSocket* m_IPv6Socket;
 };