serverdiscovery.h

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#ifndef SERVERDISCOVERY_H
#define SERVERDISCOVERY_H

#include <QObject>
#include <QUdpSocket>
#include <QTimer>
#include "../../shared/networkmessage.h"

class ServerDiscovery : public QObject
{
   Q_OBJECT

public:
   enum class ErrorType
   {
       InvalidIpList,
       InvalidHash
   };

   explicit ServerDiscovery(QObject *parent = nullptr);
   ~ServerDiscovery() override;

   void start(const QByteArray& sessionName, const QString& mgrIP);
   void stop();
   inline bool isActive() { return _discoveryTimer.isActive(); }

private:
   QTimer     _discoveryTimer;
   const int  _minDiscoveryInterval;
   const int  _maxDiscoveryInterval;
   int        _hashErrorCount;
   int        _ipErrorCount;
   QByteArray _nameBytes;
   QByteArray _salt2;
   QUdpSocket _discoverySocket;
   NetworkMessage _packet;

   QHostAddress _mgrIP;

   static const int UDPBUFSIZ = 9000;
   static const int SALT_LEN = 18;

signals:
   void serverDetected(const QString& host, const quint16 port, const QByteArray& sessionName, const QByteArray& certHash, bool autoConnect);
   void error(ErrorType e, int count);

public slots:

private slots:
   void doDiscovery();
   void onUdpReadyRead();

};

#endif // SERVERDISCOVERY_H