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diff --git a/src/network/kernel/qnetworkinformation_p.h b/src/network/kernel/qnetworkinformation_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtNetwork module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QNETWORKINFORMATION_P_H
+#define QNETWORKINFORMATION_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists for the convenience
+// of the Network Information API. This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtNetwork/private/qtnetworkglobal_p.h>
+
+#include <QtNetwork/qnetworkinformation.h>
+
+#include <QtCore/qloggingcategory.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_NETWORK_EXPORT QNetworkInformationBackend : public QObject
+{
+    Q_OBJECT
+public:
+    virtual ~QNetworkInformationBackend();
+
+    virtual QString name() const = 0;
+    virtual QNetworkInformation::Features featuresSupported() const = 0;
+
+Q_SIGNALS:
+    void reachabilityChanged();
+
+protected:
+    void setReachability(QNetworkInformation::Reachability reachability)
+    {
+        if (m_reachability != reachability) {
+            m_reachability = reachability;
+            emit reachabilityChanged();
+        }
+    }
+
+private:
+    QNetworkInformation::Reachability m_reachability = QNetworkInformation::Reachability::Unknown;
+
+    friend class QNetworkInformation;
+    friend class QNetworkInformationPrivate;
+};
+
+class Q_NETWORK_EXPORT QNetworkInformationBackendFactory : public QObject
+{
+    Q_OBJECT
+public:
+    QNetworkInformationBackendFactory();
+    virtual ~QNetworkInformationBackendFactory();
+    virtual QString name() const = 0;
+    virtual QNetworkInformationBackend *create(QNetworkInformation::Features requiredFeatures) const = 0;
+    virtual QNetworkInformation::Features featuresSupported() const = 0;
+};
+#define QNetworkInformationBackendFactory_iid "org.qt-project.Qt.NetworkInformationBackendFactory"
+Q_DECLARE_INTERFACE(QNetworkInformationBackendFactory, QNetworkInformationBackendFactory_iid);
+
+QT_END_NAMESPACE
+
+#endif