1 files changed, 158 insertions, 0 deletions
diff --git a/src/plugins/networkinformation/scnetworkreachability/qscnetworkreachabilitynetworkinformationbackend.mm b/src/plugins/networkinformation/scnetworkreachability/qscnetworkreachabilitynetworkinformationbackend.mm
new file mode 100644
index 0000000000..d1f3cb41d4
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+++ b/src/plugins/networkinformation/scnetworkreachability/qscnetworkreachabilitynetworkinformationbackend.mm
@@ -0,0 +1,158 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include <QtNetwork/private/qnetworkinformation_p.h>
+
+#include <QtNetwork/private/qnetconmonitor_p.h>
+
+#include <QtCore/qglobal.h>
+#include <QtCore/private/qobject_p.h>
+
+QT_BEGIN_NAMESPACE
+Q_DECLARE_LOGGING_CATEGORY(lcNetInfoSCR)
+Q_LOGGING_CATEGORY(lcNetInfoSCR, "qt.network.info.scnetworkreachability");
+
+static QString backendName()
+{
+    return QString::fromUtf16(QNetworkInformationBackend::PluginNames
+                                      [QNetworkInformationBackend::PluginNamesAppleIndex]);
+}
+
+class QSCNetworkReachabilityNetworkInformationBackend : public QNetworkInformationBackend
+{
+    Q_OBJECT
+public:
+    QSCNetworkReachabilityNetworkInformationBackend();
+    ~QSCNetworkReachabilityNetworkInformationBackend();
+
+    QString name() const override { return backendName(); }
+    QNetworkInformation::Features featuresSupported() const override
+    {
+        return featuresSupportedStatic();
+    }
+
+    static QNetworkInformation::Features featuresSupportedStatic()
+    {
+        return QNetworkInformation::Features(QNetworkInformation::Feature::Reachability
+#ifdef QT_PLATFORM_UIKIT
+                                             | QNetworkInformation::Feature::TransportMedium
+#endif
+                                             );
+    }
+
+private Q_SLOTS:
+    void reachabilityChanged(bool isOnline);
+
+#ifdef QT_PLATFORM_UIKIT
+    void isWwanChanged(bool isOnline);
+#endif
+
+private:
+    Q_DISABLE_COPY_MOVE(QSCNetworkReachabilityNetworkInformationBackend);
+
+    QNetworkConnectionMonitor ipv4Probe;
+    QNetworkConnectionMonitor ipv6Probe;
+};
+
+class QSCNetworkReachabilityNetworkInformationBackendFactory : public QNetworkInformationBackendFactory
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID QNetworkInformationBackendFactory_iid)
+    Q_INTERFACES(QNetworkInformationBackendFactory)
+public:
+    QSCNetworkReachabilityNetworkInformationBackendFactory() = default;
+    ~QSCNetworkReachabilityNetworkInformationBackendFactory() = default;
+    QString name() const override { return backendName(); }
+    QNetworkInformation::Features featuresSupported() const override
+    {
+        return QSCNetworkReachabilityNetworkInformationBackend::featuresSupportedStatic();
+    }
+
+    QNetworkInformationBackend *create(QNetworkInformation::Features requiredFeatures) const override
+    {
+        if ((requiredFeatures & featuresSupported()) != requiredFeatures)
+            return nullptr;
+        return new QSCNetworkReachabilityNetworkInformationBackend();
+    }
+
+private:
+    Q_DISABLE_COPY_MOVE(QSCNetworkReachabilityNetworkInformationBackendFactory);
+};
+
+QSCNetworkReachabilityNetworkInformationBackend::QSCNetworkReachabilityNetworkInformationBackend()
+{
+    bool isOnline = false;
+#ifdef QT_PLATFORM_UIKIT
+    bool isWwan = false;
+#endif
+    if (ipv4Probe.setTargets(QHostAddress::AnyIPv4, {})) {
+        // We manage to create SCNetworkReachabilityRef for IPv4, let's
+        // read the last known state then!
+        isOnline |= ipv4Probe.isReachable();
+#ifdef QT_PLATFORM_UIKIT
+        isWwan |= ipv4Probe.isWwan();
+#endif
+        ipv4Probe.startMonitoring();
+    }
+
+    if (ipv6Probe.setTargets(QHostAddress::AnyIPv6, {})) {
+        // We manage to create SCNetworkReachability ref for IPv6, let's
+        // read the last known state then!
+        isOnline |= ipv6Probe.isReachable();
+#ifdef QT_PLATFORM_UIKIT
+        isWwan |= ipv6Probe.isWwan();
+#endif
+        ipv6Probe.startMonitoring();
+    }
+    reachabilityChanged(isOnline);
+#ifdef QT_PLATFORM_UIKIT
+    isWwanChanged(isWwan);
+#endif
+
+    connect(&ipv4Probe, &QNetworkConnectionMonitor::reachabilityChanged, this,
+            &QSCNetworkReachabilityNetworkInformationBackend::reachabilityChanged,
+            Qt::QueuedConnection);
+    connect(&ipv6Probe, &QNetworkConnectionMonitor::reachabilityChanged, this,
+            &QSCNetworkReachabilityNetworkInformationBackend::reachabilityChanged,
+            Qt::QueuedConnection);
+
+#ifdef QT_PLATFORM_UIKIT
+    connect(&ipv4Probe, &QNetworkConnectionMonitor::isWwanChanged, this,
+            &QSCNetworkReachabilityNetworkInformationBackend::isWwanChanged,
+            Qt::QueuedConnection);
+    connect(&ipv6Probe, &QNetworkConnectionMonitor::isWwanChanged, this,
+            &QSCNetworkReachabilityNetworkInformationBackend::isWwanChanged,
+            Qt::QueuedConnection);
+#endif
+}
+
+QSCNetworkReachabilityNetworkInformationBackend::~QSCNetworkReachabilityNetworkInformationBackend()
+{
+}
+
+void QSCNetworkReachabilityNetworkInformationBackend::reachabilityChanged(bool isOnline)
+{
+    setReachability(isOnline ? QNetworkInformation::Reachability::Online
+                             : QNetworkInformation::Reachability::Disconnected);
+}
+
+#ifdef QT_PLATFORM_UIKIT
+void QSCNetworkReachabilityNetworkInformationBackend::isWwanChanged(bool isWwan)
+{
+    // The reachability API from Apple only has one entry regarding transport medium: "IsWWAN"[0].
+    // This is _serviceable_ on iOS where the only other credible options are "WLAN" or
+    // "Disconnected". But on macOS you could be connected by Ethernet as well, so how would that be
+    // reported? It doesn't matter anyway since "IsWWAN" is not available on macOS.
+    // [0]: https://developer.apple.com/documentation/systemconfiguration/scnetworkreachabilityflags/kscnetworkreachabilityflagsiswwan?language=objc
+    if (reachability() == QNetworkInformation::Reachability::Disconnected) {
+        setTransportMedium(QNetworkInformation::TransportMedium::Unknown);
+    } else {
+        setTransportMedium(isWwan ? QNetworkInformation::TransportMedium::Cellular
+                                  : QNetworkInformation::TransportMedium::WiFi);
+    }
+}
+#endif
+
+QT_END_NAMESPACE
+
+#include "qscnetworkreachabilitynetworkinformationbackend.moc"