diff --git a/src/network/access/qabstractnetworkcache.h b/src/network/access/qabstractnetworkcache.h
index b563090..352daa9 100644
--- a/src/network/access/qabstractnetworkcache.h
+++ b/src/network/access/qabstractnetworkcache.h
@@ -37,6 +37,7 @@
 #include <QtCore/QObject>
 #ifndef QT_NO_SSL
 #include <QtNetwork/QSslConfiguration>
+#include <QtNetwork/QSslPreSharedKeyAuthenticator>
 #endif
 
 QT_BEGIN_NAMESPACE
@@ -145,6 +146,7 @@ Q_SIGNALS:
 #ifndef QT_NO_SSL
     void encrypted(QNetworkReply *reply);
     void sslErrors(QNetworkReply *reply, const QList<QSslError> &errors);
+    void preSharedKeyAuthenticationRequired(QNetworkReply *reply, QSslPreSharedKeyAuthenticator *authenticator);
 #endif
 
 #ifndef QT_NO_BEARERMANAGEMENT
@@ -169,6 +171,7 @@ private:
     Q_PRIVATE_SLOT(d_func(), void _q_replyFinished())
     Q_PRIVATE_SLOT(d_func(), void _q_replyEncrypted())
     Q_PRIVATE_SLOT(d_func(), void _q_replySslErrors(QList<QSslError>))
+    Q_PRIVATE_SLOT(d_func(), void _q_replyPreSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator*))
 #ifndef QT_NO_BEARERMANAGEMENT
     Q_PRIVATE_SLOT(d_func(), void _q_networkSessionClosed())
     Q_PRIVATE_SLOT(d_func(), void _q_networkSessionStateChanged(QNetworkSession::State))
diff --git a/src/network/access/qnetworkcookie.h b/src/network/access/qnetworkcookie.h
index ad977d2..2da86d3 100644
--- a/src/network/access/qnetworkcookie.h
+++ b/src/network/access/qnetworkcookie.h
@@ -56,18 +56,18 @@ public:
     qint64 maximumCacheSize() const;
     void setMaximumCacheSize(qint64 size);
 
-    qint64 cacheSize() const;
-    QNetworkCacheMetaData metaData(const QUrl &url);
-    void updateMetaData(const QNetworkCacheMetaData &metaData);
-    QIODevice *data(const QUrl &url);
-    bool remove(const QUrl &url);
-    QIODevice *prepare(const QNetworkCacheMetaData &metaData);
-    void insert(QIODevice *device);
+    qint64 cacheSize() const Q_DECL_OVERRIDE;
+    QNetworkCacheMetaData metaData(const QUrl &url) Q_DECL_OVERRIDE;
+    void updateMetaData(const QNetworkCacheMetaData &metaData) Q_DECL_OVERRIDE;
+    QIODevice *data(const QUrl &url) Q_DECL_OVERRIDE;
+    bool remove(const QUrl &url) Q_DECL_OVERRIDE;
+    QIODevice *prepare(const QNetworkCacheMetaData &metaData) Q_DECL_OVERRIDE;
+    void insert(QIODevice *device) Q_DECL_OVERRIDE;
 
     QNetworkCacheMetaData fileMetaData(const QString &fileName) const;
 
 public Q_SLOTS:
-    void clear();
+    void clear() Q_DECL_OVERRIDE;
 
 protected:
     virtual qint64 expire();
diff --git a/src/network/access/qnetworkreply.h b/src/network/access/qnetworkreply.h
index 4a32131..91c9e77 100644
--- a/src/network/access/qnetworkreply.h
+++ b/src/network/access/qnetworkreply.h
@@ -49,12 +49,12 @@ class QVariant;
 class QAuthenticator;
 class QSslConfiguration;
 class QSslError;
+class QSslPreSharedKeyAuthenticator;
 
 class QNetworkReplyPrivate;
 class Q_NETWORK_EXPORT QNetworkReply: public QIODevice
 {
     Q_OBJECT
-    Q_ENUMS(NetworkError)
 public:
     enum NetworkError {
         NoError = 0,
@@ -100,12 +100,13 @@ public:
         ServiceUnavailableError,
         UnknownServerError = 499
     };
+    Q_ENUM(NetworkError)
 
     ~QNetworkReply();
 
     // reimplemented from QIODevice
-    virtual void close();
-    virtual bool isSequential() const;
+    virtual void close() Q_DECL_OVERRIDE;
+    virtual bool isSequential() const Q_DECL_OVERRIDE;
 
     // like QAbstractSocket:
     qint64 readBufferSize() const;
@@ -150,6 +151,7 @@ Q_SIGNALS:
 #ifndef QT_NO_SSL
     void encrypted();
     void sslErrors(const QList<QSslError> &errors);
+    void preSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator *authenticator);
 #endif
 
     void uploadProgress(qint64 bytesSent, qint64 bytesTotal);
@@ -158,7 +160,7 @@ Q_SIGNALS:
 protected:
     explicit QNetworkReply(QObject *parent = 0);
     QNetworkReply(QNetworkReplyPrivate &dd, QObject *parent);
-    virtual qint64 writeData(const char *data, qint64 len);
+    virtual qint64 writeData(const char *data, qint64 len) Q_DECL_OVERRIDE;
 
     void setOperation(QNetworkAccessManager::Operation operation);
     void setRequest(const QNetworkRequest &request);
diff --git a/src/network/access/qnetworkrequest.h b/src/network/access/qnetworkrequest.h
index 0239ae7..d6d907b 100644
--- a/src/network/access/qnetworkrequest.h
+++ b/src/network/access/qnetworkrequest.h
@@ -80,6 +80,7 @@ public:
         BackgroundRequestAttribute,
         SpdyAllowedAttribute,
         SpdyWasUsedAttribute,
+        EmitAllUploadProgressSignalsAttribute,
 
         User = 1000,
         UserMax = 32767
diff --git a/src/network/bearer/qnetworkconfigmanager.h b/src/network/bearer/qnetworkconfigmanager.h
index 1ff233c..b62a44c 100644
--- a/src/network/bearer/qnetworkconfigmanager.h
+++ b/src/network/bearer/qnetworkconfigmanager.h
@@ -124,8 +124,8 @@ Q_SIGNALS:
     void usagePoliciesChanged(QNetworkSession::UsagePolicies usagePolicies);
 
 protected:
-    virtual void connectNotify(const QMetaMethod &signal);
-    virtual void disconnectNotify(const QMetaMethod &signal);
+    virtual void connectNotify(const QMetaMethod &signal) Q_DECL_OVERRIDE;
+    virtual void disconnectNotify(const QMetaMethod &signal) Q_DECL_OVERRIDE;
 
 private:
     Q_DISABLE_COPY(QNetworkSession)
diff --git a/src/network/kernel/qauthenticator.h b/src/network/kernel/qauthenticator.h
index 436e553..ade0e1a 100644
--- a/src/network/kernel/qauthenticator.h
+++ b/src/network/kernel/qauthenticator.h
@@ -167,7 +167,6 @@ Q_DECLARE_SHARED(QDnsTextRecord)
 class Q_NETWORK_EXPORT QDnsLookup : public QObject
 {
     Q_OBJECT
-    Q_ENUMS(Error Type)
     Q_PROPERTY(Error error READ error NOTIFY finished)
     Q_PROPERTY(QString errorString READ errorString NOTIFY finished)
     Q_PROPERTY(QString name READ name WRITE setName NOTIFY nameChanged)
@@ -186,6 +185,7 @@ public:
         ServerRefusedError,
         NotFoundError
     };
+    Q_ENUM(Error)
 
     enum Type
     {
@@ -199,6 +199,7 @@ public:
         SRV = 33,
         TXT = 16
     };
+    Q_ENUM(Type)
 
     explicit QDnsLookup(QObject *parent = 0);
     QDnsLookup(Type type, const QString &name, QObject *parent = 0);
diff --git a/src/network/kernel/qhostaddress.h b/src/network/kernel/qhostaddress.h
index d849048..0c2229c 100644
--- a/src/network/kernel/qhostaddress.h
+++ b/src/network/kernel/qhostaddress.h
@@ -75,7 +75,8 @@ public:
 
     QHostAddress();
     explicit QHostAddress(quint32 ip4Addr);
-    explicit QHostAddress(quint8 *ip6Addr);
+    explicit QHostAddress(quint8 *ip6Addr); // ### Qt 6: remove me
+    explicit QHostAddress(const quint8 *ip6Addr);
     explicit QHostAddress(const Q_IPV6ADDR &ip6Addr);
     explicit QHostAddress(const sockaddr *address);
     explicit QHostAddress(const QString &address);
@@ -87,13 +88,15 @@ public:
     QHostAddress &operator=(const QString &address);
 
     void setAddress(quint32 ip4Addr);
-    void setAddress(quint8 *ip6Addr);
+    void setAddress(quint8 *ip6Addr);   // ### Qt 6: remove me
+    void setAddress(const quint8 *ip6Addr);
     void setAddress(const Q_IPV6ADDR &ip6Addr);
     void setAddress(const sockaddr *address);
     bool setAddress(const QString &address);
 
     QAbstractSocket::NetworkLayerProtocol protocol() const;
-    quint32 toIPv4Address() const;
+    quint32 toIPv4Address() const; // ### Qt6: merge with next overload
+    quint32 toIPv4Address(bool *ok) const;
     Q_IPV6ADDR toIPv6Address() const;
 
     QString toString() const;
diff --git a/src/network/kernel/qhostinfo.h b/src/network/kernel/qhostinfo.h
index 9bd1486..4f60638 100644
--- a/src/network/kernel/qhostinfo.h
+++ b/src/network/kernel/qhostinfo.h
@@ -53,19 +53,20 @@ class QAuthenticator;
 class Q_NETWORK_EXPORT QAbstractSocket : public QIODevice
 {
     Q_OBJECT
-    Q_ENUMS(SocketType NetworkLayerProtocol SocketError SocketState SocketOption)
 public:
     enum SocketType {
         TcpSocket,
         UdpSocket,
         UnknownSocketType = -1
     };
+    Q_ENUM(SocketType)
     enum NetworkLayerProtocol {
         IPv4Protocol,
         IPv6Protocol,
         AnyIPProtocol,
         UnknownNetworkLayerProtocol = -1
     };
+    Q_ENUM(NetworkLayerProtocol)
     enum SocketError {
         ConnectionRefusedError,
         RemoteHostClosedError,
@@ -93,6 +94,7 @@ public:
 
         UnknownSocketError = -1
     };
+    Q_ENUM(SocketError)
     enum SocketState {
         UnconnectedState,
         HostLookupState,
@@ -102,6 +104,7 @@ public:
         ListeningState,
         ClosingState
     };
+    Q_ENUM(SocketState)
     enum SocketOption {
         LowDelayOption, // TCP_NODELAY
         KeepAliveOption, // SO_KEEPALIVE
@@ -111,6 +114,7 @@ public:
         SendBufferSizeSocketOption,    //SO_SNDBUF
         ReceiveBufferSizeSocketOption  //SO_RCVBUF
     };
+    Q_ENUM(SocketOption)
     enum BindFlag {
         DefaultForPlatform = 0x0,
         ShareAddress = 0x1,
@@ -131,19 +135,21 @@ public:
     PauseModes pauseMode() const;
     void setPauseMode(PauseModes pauseMode);
 
+    // ### Qt6: make the first one virtual
     bool bind(const QHostAddress &address, quint16 port = 0, BindMode mode = DefaultForPlatform);
     bool bind(quint16 port = 0, BindMode mode = DefaultForPlatform);
 
+    // ### Qt6: de-virtualize connectToHost(QHostAddress) overload
     virtual void connectToHost(const QString &hostName, quint16 port, OpenMode mode = ReadWrite, NetworkLayerProtocol protocol = AnyIPProtocol);
     virtual void connectToHost(const QHostAddress &address, quint16 port, OpenMode mode = ReadWrite);
     virtual void disconnectFromHost();
 
     bool isValid() const;
 
-    qint64 bytesAvailable() const;
-    qint64 bytesToWrite() const;
+    qint64 bytesAvailable() const Q_DECL_OVERRIDE;
+    qint64 bytesToWrite() const Q_DECL_OVERRIDE;
 
-    bool canReadLine() const;
+    bool canReadLine() const Q_DECL_OVERRIDE;
 
     quint16 localPort() const;
     QHostAddress localAddress() const;
@@ -168,15 +174,15 @@ public:
     SocketError error() const;
 
     // from QIODevice
-    void close();
-    bool isSequential() const;
-    bool atEnd() const;
+    void close() Q_DECL_OVERRIDE;
+    bool isSequential() const Q_DECL_OVERRIDE;
+    bool atEnd() const Q_DECL_OVERRIDE;
     bool flush();
 
     // for synchronous access
     virtual bool waitForConnected(int msecs = 30000);
-    bool waitForReadyRead(int msecs = 30000);
-    bool waitForBytesWritten(int msecs = 30000);
+    bool waitForReadyRead(int msecs = 30000) Q_DECL_OVERRIDE;
+    bool waitForBytesWritten(int msecs = 30000) Q_DECL_OVERRIDE;
     virtual bool waitForDisconnected(int msecs = 30000);
 
 #ifndef QT_NO_NETWORKPROXY
@@ -195,9 +201,9 @@ Q_SIGNALS:
 #endif
 
 protected:
-    qint64 readData(char *data, qint64 maxlen);
-    qint64 readLineData(char *data, qint64 maxlen);
-    qint64 writeData(const char *data, qint64 len);
+    qint64 readData(char *data, qint64 maxlen) Q_DECL_OVERRIDE;
+    qint64 readLineData(char *data, qint64 maxlen) Q_DECL_OVERRIDE;
+    qint64 writeData(const char *data, qint64 len) Q_DECL_OVERRIDE;
 
     void setSocketState(SocketState state);
     void setSocketError(SocketError socketError);
diff --git a/src/network/socket/qlocalserver.h b/src/network/socket/qlocalserver.h
index c22ab89..a03cdb7 100644
--- a/src/network/socket/qlocalserver.h
+++ b/src/network/socket/qlocalserver.h
@@ -85,12 +85,12 @@ public:
     QString fullServerName() const;
 
     void abort();
-    virtual bool isSequential() const;
-    virtual qint64 bytesAvailable() const;
-    virtual qint64 bytesToWrite() const;
-    virtual bool canReadLine() const;
+    virtual bool isSequential() const Q_DECL_OVERRIDE;
+    virtual qint64 bytesAvailable() const Q_DECL_OVERRIDE;
+    virtual qint64 bytesToWrite() const Q_DECL_OVERRIDE;
+    virtual bool canReadLine() const Q_DECL_OVERRIDE;
     virtual bool open(OpenMode openMode = ReadWrite) Q_DECL_OVERRIDE;
-    virtual void close();
+    virtual void close() Q_DECL_OVERRIDE;
     LocalSocketError error() const;
     bool flush();
     bool isValid() const;
@@ -103,10 +103,10 @@ public:
     qintptr socketDescriptor() const;
 
     LocalSocketState state() const;
-    bool waitForBytesWritten(int msecs = 30000);
+    bool waitForBytesWritten(int msecs = 30000) Q_DECL_OVERRIDE;
     bool waitForConnected(int msecs = 30000);
     bool waitForDisconnected(int msecs = 30000);
-    bool waitForReadyRead(int msecs = 30000);
+    bool waitForReadyRead(int msecs = 30000) Q_DECL_OVERRIDE;
 
 Q_SIGNALS:
     void connected();
@@ -115,8 +115,8 @@ Q_SIGNALS:
     void stateChanged(QLocalSocket::LocalSocketState socketState);
 
 protected:
-    virtual qint64 readData(char*, qint64);
-    virtual qint64 writeData(const char*, qint64);
+    virtual qint64 readData(char*, qint64) Q_DECL_OVERRIDE;
+    virtual qint64 writeData(const char*, qint64) Q_DECL_OVERRIDE;
 
 private:
     Q_DISABLE_COPY(QLocalSocket)
diff --git a/src/network/socket/qtcpserver.h b/src/network/socket/qtcpserver.h
index 2098a3b..8c7537a 100644
--- a/src/network/socket/qtcpserver.h
+++ b/src/network/socket/qtcpserver.h
@@ -87,6 +87,8 @@ protected:
     virtual void incomingConnection(qintptr handle);
     void addPendingConnection(QTcpSocket* socket);
 
+    QTcpServer(QTcpServerPrivate &dd, QObject *parent = 0);
+
 Q_SIGNALS:
     void newConnection();
     void acceptError(QAbstractSocket::SocketError socketError);
diff --git a/src/network/socket/qtcpsocket.h b/src/network/socket/qtcpsocket.h
index ea17652..3449bee 100644
--- a/src/network/socket/qtcpsocket.h
+++ b/src/network/socket/qtcpsocket.h
@@ -55,7 +55,8 @@ namespace QSsl {
     enum KeyAlgorithm {
         Opaque,
         Rsa,
-        Dsa
+        Dsa,
+        Ec
     };
 
     enum AlternativeNameEntryType {
@@ -79,6 +80,11 @@ namespace QSsl {
         AnyProtocol,
         TlsV1SslV3,
         SecureProtocols,
+
+        TlsV1_0OrLater,
+        TlsV1_1OrLater,
+        TlsV1_2OrLater,
+
         UnknownProtocol = -1
     };
 
diff --git a/src/network/ssl/qsslcertificate.h b/src/network/ssl/qsslcertificate.h
index 6aa7544..ef0767a 100644
--- a/src/network/ssl/qsslcertificate.h
+++ b/src/network/ssl/qsslcertificate.h
@@ -136,7 +136,11 @@ public:
     static QList<QSslCertificate> fromData(
         const QByteArray &data, QSsl::EncodingFormat format = QSsl::Pem);
 
+#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
+    static QList<QSslError> verify(const QList<QSslCertificate> &certificateChain, const QString &hostName = QString());
+#else
     static QList<QSslError> verify(QList<QSslCertificate> certificateChain, const QString &hostName = QString());
+#endif
 
     static bool importPkcs12(QIODevice *device,
                              QSslKey *key, QSslCertificate *cert,
diff --git a/src/network/ssl/qsslcertificateextension.h b/src/network/ssl/qsslcertificateextension.h
index 95bfd1d..7c958ef 100644
--- a/src/network/ssl/qsslcertificateextension.h
+++ b/src/network/ssl/qsslcertificateextension.h
@@ -62,6 +62,7 @@ template<typename T> class QList;
 class QSslCertificate;
 class QSslCipher;
 class QSslKey;
+class QSslEllipticCurve;
 
 class QSslConfigurationPrivate;
 class Q_NETWORK_EXPORT QSslConfiguration
@@ -122,6 +123,10 @@ public:
     void setSessionTicket(const QByteArray &sessionTicket);
     int sessionTicketLifeTimeHint() const;
 
+    // EC settings
+    QVector<QSslEllipticCurve> ellipticCurves() const;
+    void setEllipticCurves(const QVector<QSslEllipticCurve> &curves);
+
     static QSslConfiguration defaultConfiguration();
     static void setDefaultConfiguration(const QSslConfiguration &configuration);
 
@@ -131,7 +136,11 @@ public:
         NextProtocolNegotiationUnsupported
     };
 
+#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
+    void setAllowedNextProtocols(const QList<QByteArray> &protocols);
+#else
     void setAllowedNextProtocols(QList<QByteArray> protocols);
+#endif
     QList<QByteArray> allowedNextProtocols() const;
 
     QByteArray nextNegotiatedProtocol() const;
diff --git a/src/network/ssl/qsslerror.h b/src/network/ssl/qsslerror.h
index c00532e..b149f86 100644
--- a/src/network/ssl/qsslerror.h
+++ b/src/network/ssl/qsslerror.h
@@ -51,6 +51,8 @@ class QDir;
 class QSslCipher;
 class QSslCertificate;
 class QSslConfiguration;
+class QSslEllipticCurve;
+class QSslPreSharedKeyAuthenticator;
 
 class QSslSocketPrivate;
 class Q_NETWORK_EXPORT QSslSocket : public QTcpSocket
@@ -72,20 +74,20 @@ public:
 
     explicit QSslSocket(QObject *parent = 0);
     ~QSslSocket();
-    void resume(); // to continue after proxy authentication required, SSL errors etc.
+    void resume() Q_DECL_OVERRIDE; // to continue after proxy authentication required, SSL errors etc.
 
     // Autostarting the SSL client handshake.
     void connectToHostEncrypted(const QString &hostName, quint16 port, OpenMode mode = ReadWrite, NetworkLayerProtocol protocol = AnyIPProtocol);
     void connectToHostEncrypted(const QString &hostName, quint16 port, const QString &sslPeerName, OpenMode mode = ReadWrite, NetworkLayerProtocol protocol = AnyIPProtocol);
     bool setSocketDescriptor(qintptr socketDescriptor, SocketState state = ConnectedState,
-                             OpenMode openMode = ReadWrite);
+                             OpenMode openMode = ReadWrite) Q_DECL_OVERRIDE;
 
     using QAbstractSocket::connectToHost;
-    void connectToHost(const QString &hostName, quint16 port, OpenMode openMode = ReadWrite, NetworkLayerProtocol protocol = AnyIPProtocol);
-    void disconnectFromHost();
+    void connectToHost(const QString &hostName, quint16 port, OpenMode openMode = ReadWrite, NetworkLayerProtocol protocol = AnyIPProtocol) Q_DECL_OVERRIDE;
+    void disconnectFromHost() Q_DECL_OVERRIDE;
 
-    virtual void setSocketOption(QAbstractSocket::SocketOption option, const QVariant &value);
-    virtual QVariant socketOption(QAbstractSocket::SocketOption option);
+    virtual void setSocketOption(QAbstractSocket::SocketOption option, const QVariant &value) Q_DECL_OVERRIDE;
+    virtual QVariant socketOption(QAbstractSocket::SocketOption option) Q_DECL_OVERRIDE;
 
     SslMode mode() const;
     bool isEncrypted() const;
@@ -103,16 +105,16 @@ public:
     void setPeerVerifyName(const QString &hostName);
 
     // From QIODevice
-    qint64 bytesAvailable() const;
-    qint64 bytesToWrite() const;
-    bool canReadLine() const;
-    void close();
-    bool atEnd() const;
+    qint64 bytesAvailable() const Q_DECL_OVERRIDE;
+    qint64 bytesToWrite() const Q_DECL_OVERRIDE;
+    bool canReadLine() const Q_DECL_OVERRIDE;
+    void close() Q_DECL_OVERRIDE;
+    bool atEnd() const Q_DECL_OVERRIDE;
     bool flush();
     void abort();
 
     // From QAbstractSocket:
-    void setReadBufferSize(qint64 size);
+    void setReadBufferSize(qint64 size) Q_DECL_OVERRIDE;
 
     // Similar to QIODevice's:
     qint64 encryptedBytesAvailable() const;
@@ -149,6 +151,13 @@ public:
     static QList<QSslCipher> defaultCiphers();
     static QList<QSslCipher> supportedCiphers();
 
+    // EC settings.
+    QVector<QSslEllipticCurve> ellipticCurves() const;
+    void setEllipticCurves(const QVector<QSslEllipticCurve> &curves);
+    static void setDefaultEllipticCurves(const QVector<QSslEllipticCurve> &curves);
+    static QVector<QSslEllipticCurve> defaultEllipticCurves();
+    static QVector<QSslEllipticCurve> supportedEllipticCurves();
+
     // CA settings.
     bool addCaCertificates(const QString &path, QSsl::EncodingFormat format = QSsl::Pem,
                            QRegExp::PatternSyntax syntax = QRegExp::FixedString);
@@ -164,11 +173,11 @@ public:
     static QList<QSslCertificate> defaultCaCertificates();
     static QList<QSslCertificate> systemCaCertificates();
 
-    bool waitForConnected(int msecs = 30000);
+    bool waitForConnected(int msecs = 30000) Q_DECL_OVERRIDE;
     bool waitForEncrypted(int msecs = 30000);
-    bool waitForReadyRead(int msecs = 30000);
-    bool waitForBytesWritten(int msecs = 30000);
-    bool waitForDisconnected(int msecs = 30000);
+    bool waitForReadyRead(int msecs = 30000) Q_DECL_OVERRIDE;
+    bool waitForBytesWritten(int msecs = 30000) Q_DECL_OVERRIDE;
+    bool waitForDisconnected(int msecs = 30000) Q_DECL_OVERRIDE;
 
     QList<QSslError> sslErrors() const;
 
@@ -191,10 +200,11 @@ Q_SIGNALS:
     void sslErrors(const QList<QSslError> &errors);
     void modeChanged(QSslSocket::SslMode newMode);
     void encryptedBytesWritten(qint64 totalBytes);
+    void preSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator *authenticator);
 
 protected:
-    qint64 readData(char *data, qint64 maxlen);
-    qint64 writeData(const char *data, qint64 len);
+    qint64 readData(char *data, qint64 maxlen) Q_DECL_OVERRIDE;
+    qint64 writeData(const char *data, qint64 len) Q_DECL_OVERRIDE;
 
 private:
     Q_DECLARE_PRIVATE(QSslSocket)
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