From 402cb62d5db7516e4d8d77d972e55e90cb855679 Mon Sep 17 00:00:00 2001 From: Timur Pocheptsov Date: Fri, 15 Mar 2019 12:05:38 +0100 Subject: Introduce QNetworkConnection/Status/Monitor MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Private classes to replace broken or even not working at all 'session management' and 'bearer manager' (on at least two major platforms we support). This implementation is macOS/iOS-specific and uses SystemConfiguration framework, or more precisely SCNetworkReachability's part of it. Task-number: QTBUG-40332 Change-Id: Iac5f44c4063c4092b93b8cf2bde3fb2c524855b3 Reviewed-by: Mårten Nordheim --- src/network/access/qhttpnetworkconnection.cpp | 38 +- src/network/access/qhttpnetworkconnection_p.h | 13 + .../access/qhttpnetworkconnectionchannel.cpp | 12 + src/network/access/qnetworkaccessmanager.cpp | 153 ++++++-- src/network/access/qnetworkaccessmanager.h | 2 +- src/network/access/qnetworkaccessmanager_p.h | 8 +- src/network/access/qnetworkreplyhttpimpl.cpp | 15 +- src/network/access/qnetworkreplyimpl.cpp | 2 - src/network/access/qnetworkreplyimpl_p.h | 2 - src/network/kernel/kernel.pri | 12 +- src/network/kernel/qnetconmonitor_darwin.mm | 434 +++++++++++++++++++++ src/network/kernel/qnetconmonitor_p.h | 126 ++++++ src/network/kernel/qnetconmonitor_stub.cpp | 141 +++++++ 13 files changed, 903 insertions(+), 55 deletions(-) create mode 100644 src/network/kernel/qnetconmonitor_darwin.mm create mode 100644 src/network/kernel/qnetconmonitor_p.h create mode 100644 src/network/kernel/qnetconmonitor_stub.cpp (limited to 'src') diff --git a/src/network/access/qhttpnetworkconnection.cpp b/src/network/access/qhttpnetworkconnection.cpp index 0a37122fc6..cb4c722eb5 100644 --- a/src/network/access/qhttpnetworkconnection.cpp +++ b/src/network/access/qhttpnetworkconnection.cpp @@ -1320,6 +1320,10 @@ QHttpNetworkConnection::QHttpNetworkConnection(const QString &hostName, quint16 Q_D(QHttpNetworkConnection); d->networkSession = std::move(networkSession); d->init(); + if (QNetworkStatusMonitor::isEnabled()) { + connect(&d->connectionMonitor, &QNetworkConnectionMonitor::reachabilityChanged, + this, &QHttpNetworkConnection::onlineStateChanged, Qt::QueuedConnection); + } } QHttpNetworkConnection::QHttpNetworkConnection(quint16 connectionCount, const QString &hostName, @@ -1332,6 +1336,10 @@ QHttpNetworkConnection::QHttpNetworkConnection(quint16 connectionCount, const QS Q_D(QHttpNetworkConnection); d->networkSession = std::move(networkSession); d->init(); + if (QNetworkStatusMonitor::isEnabled()) { + connect(&d->connectionMonitor, &QNetworkConnectionMonitor::reachabilityChanged, + this, &QHttpNetworkConnection::onlineStateChanged, Qt::QueuedConnection); + } } #else QHttpNetworkConnection::QHttpNetworkConnection(const QString &hostName, quint16 port, bool encrypt, @@ -1340,6 +1348,10 @@ QHttpNetworkConnection::QHttpNetworkConnection(const QString &hostName, quint16 { Q_D(QHttpNetworkConnection); d->init(); + if (QNetworkStatusMonitor::isEnabled()) { + connect(&d->connectionMonitor, &QNetworkConnectionMonitor::reachabilityChanged, + this, &QHttpNetworkConnection::onlineStateChanged, Qt::QueuedConnection); + } } QHttpNetworkConnection::QHttpNetworkConnection(quint16 connectionCount, const QString &hostName, @@ -1350,8 +1362,12 @@ QHttpNetworkConnection::QHttpNetworkConnection(quint16 connectionCount, const QS { Q_D(QHttpNetworkConnection); d->init(); + if (QNetworkStatusMonitor::isEnabled()) { + connect(&d->connectionMonitor, &QNetworkConnectionMonitor::reachabilityChanged, + this, &QHttpNetworkConnection::onlineStateChanged, Qt::QueuedConnection); + } } -#endif +#endif // QT_NO_BEARERMANAGEMENT QHttpNetworkConnection::~QHttpNetworkConnection() { @@ -1531,6 +1547,26 @@ void QHttpNetworkConnection::setPeerVerifyName(const QString &peerName) d->peerVerifyName = peerName; } +void QHttpNetworkConnection::onlineStateChanged(bool isOnline) +{ + Q_D(QHttpNetworkConnection); + + if (isOnline) { + // If we did not have any 'isOffline' previously - well, good + // to know, we are 'online' apparently. + return; + } + + for (int i = 0; i < d->activeChannelCount; i++) { + auto &channel = d->channels[i]; + channel.emitFinishedWithError(QNetworkReply::TemporaryNetworkFailureError, "Temporary network failure."); + channel.close(); + } + + // We don't care, this connection is broken from our POV. + d->connectionMonitor.stopMonitoring(); +} + #ifndef QT_NO_NETWORKPROXY // only called from QHttpNetworkConnectionChannel::_q_proxyAuthenticationRequired, not // from QHttpNetworkConnectionChannel::handleAuthenticationChallenge diff --git a/src/network/access/qhttpnetworkconnection_p.h b/src/network/access/qhttpnetworkconnection_p.h index 2f3c334248..85d89f20c2 100644 --- a/src/network/access/qhttpnetworkconnection_p.h +++ b/src/network/access/qhttpnetworkconnection_p.h @@ -67,6 +67,7 @@ #include #include #include +#include #include #include @@ -156,6 +157,10 @@ public: QString peerVerifyName() const; void setPeerVerifyName(const QString &peerName); + +public slots: + void onlineStateChanged(bool isOnline); + private: Q_DECLARE_PRIVATE(QHttpNetworkConnection) Q_DISABLE_COPY_MOVE(QHttpNetworkConnection) @@ -292,6 +297,14 @@ public: Http2::ProtocolParameters http2Parameters; QString peerVerifyName; + // If network status monitoring is enabled, we activate connectionMonitor + // as soons as one of channels managed to connect to host (and we + // have a pair of addresses (us,peer). + // NETMONTODO: consider activating a monitor on a change from + // HostLookUp state to ConnectingState (means we have both + // local/remote addresses known and can start monitoring this + // early). + QNetworkConnectionMonitor connectionMonitor; friend class QHttpNetworkConnectionChannel; }; diff --git a/src/network/access/qhttpnetworkconnectionchannel.cpp b/src/network/access/qhttpnetworkconnectionchannel.cpp index f79a4d1dc6..9309d718e4 100644 --- a/src/network/access/qhttpnetworkconnectionchannel.cpp +++ b/src/network/access/qhttpnetworkconnectionchannel.cpp @@ -59,6 +59,8 @@ #include "private/qnetworksession_p.h" #endif +#include "private/qnetconmonitor_p.h" + QT_BEGIN_NAMESPACE namespace @@ -896,6 +898,16 @@ void QHttpNetworkConnectionChannel::_q_connected() pipeliningSupported = QHttpNetworkConnectionChannel::PipeliningSupportUnknown; + if (QNetworkStatusMonitor::isEnabled()) { + auto connectionPrivate = connection->d_func(); + if (!connectionPrivate->connectionMonitor.isMonitoring()) { + // Now that we have a pair of addresses, we can start monitoring the + // connection status to handle its loss properly. + if (connectionPrivate->connectionMonitor.setTargets(socket->localAddress(), socket->peerAddress())) + connectionPrivate->connectionMonitor.startMonitoring(); + } + } + // ### FIXME: if the server closes the connection unexpectedly, we shouldn't send the same broken request again! //channels[i].reconnectAttempts = 2; if (ssl || pendingEncrypt) { // FIXME: Didn't work properly with pendingEncrypt only, we should refactor this into an EncrypingState diff --git a/src/network/access/qnetworkaccessmanager.cpp b/src/network/access/qnetworkaccessmanager.cpp index 50b9488594..8bd630ad9d 100644 --- a/src/network/access/qnetworkaccessmanager.cpp +++ b/src/network/access/qnetworkaccessmanager.cpp @@ -90,6 +90,8 @@ #include "qnetworkreplywasmimpl_p.h" #endif +#include "qnetconmonitor_p.h" + QT_BEGIN_NAMESPACE Q_GLOBAL_STATIC(QNetworkAccessFileBackendFactory, fileBackend) @@ -486,18 +488,25 @@ QNetworkAccessManager::QNetworkAccessManager(QObject *parent) qRegisterMetaType(); qRegisterMetaType >(); -#ifndef QT_NO_BEARERMANAGEMENT Q_D(QNetworkAccessManager); - // if a session is required, we track online state through - // the QNetworkSession's signals if a request is already made. - // we need to track current accessibility state by default - // - connect(&d->networkConfigurationManager, SIGNAL(onlineStateChanged(bool)), - SLOT(_q_onlineStateChanged(bool))); - connect(&d->networkConfigurationManager, SIGNAL(configurationChanged(QNetworkConfiguration)), - SLOT(_q_configurationChanged(QNetworkConfiguration))); - -#endif + if (QNetworkStatusMonitor::isEnabled()) { + connect(&d->statusMonitor, SIGNAL(onlineStateChanged(bool)), + SLOT(_q_onlineStateChanged(bool))); +#ifdef QT_NO_BEARERMANAGEMENT + d->networkAccessible = d->statusMonitor.isNetworkAccesible(); +#else + d->networkAccessible = d->statusMonitor.isNetworkAccesible() ? Accessible : NotAccessible; + } else { + // if a session is required, we track online state through + // the QNetworkSession's signals if a request is already made. + // we need to track current accessibility state by default + // + connect(&d->networkConfigurationManager, SIGNAL(onlineStateChanged(bool)), + SLOT(_q_onlineStateChanged(bool))); + connect(&d->networkConfigurationManager, SIGNAL(configurationChanged(QNetworkConfiguration)), + SLOT(_q_configurationChanged(QNetworkConfiguration))); +#endif // QT_NO_BEARERMANAGEMENT + } } /*! @@ -1030,9 +1039,13 @@ QNetworkReply *QNetworkAccessManager::deleteResource(const QNetworkRequest &requ void QNetworkAccessManager::setConfiguration(const QNetworkConfiguration &config) { Q_D(QNetworkAccessManager); - d->networkConfiguration = config; - d->customNetworkConfiguration = true; - d->createSession(config); + if (!d->statusMonitor.isEnabled()) { + d->networkConfiguration = config; + d->customNetworkConfiguration = true; + d->createSession(config); + } else { + qWarning(lcNetMon, "No network configuration can be set with network status monitor enabled"); + } } /*! @@ -1048,7 +1061,7 @@ QNetworkConfiguration QNetworkAccessManager::configuration() const Q_D(const QNetworkAccessManager); QSharedPointer session(d->getNetworkSession()); - if (session) { + if (session && !d->statusMonitor.isEnabled()) { return session->configuration(); } else { return d->networkConfigurationManager.defaultConfiguration(); @@ -1075,7 +1088,7 @@ QNetworkConfiguration QNetworkAccessManager::activeConfiguration() const Q_D(const QNetworkAccessManager); QSharedPointer networkSession(d->getNetworkSession()); - if (networkSession) { + if (networkSession && !d->statusMonitor.isEnabled()) { return d->networkConfigurationManager.configurationFromIdentifier( networkSession->sessionProperty(QLatin1String("ActiveConfiguration")).toString()); } else { @@ -1094,6 +1107,11 @@ void QNetworkAccessManager::setNetworkAccessible(QNetworkAccessManager::NetworkA { Q_D(QNetworkAccessManager); + if (d->statusMonitor.isEnabled()) { + qWarning(lcNetMon, "Can not manually set network accessibility with the network status monitor enabled"); + return; + } + d->defaultAccessControl = accessible == NotAccessible ? false : true; if (d->networkAccessible != accessible) { @@ -1114,6 +1132,12 @@ QNetworkAccessManager::NetworkAccessibility QNetworkAccessManager::networkAccess { Q_D(const QNetworkAccessManager); + if (d->statusMonitor.isEnabled()) { + if (!d->statusMonitor.isMonitoring()) + d->statusMonitor.start(); + return d->networkAccessible; + } + if (d->customNetworkConfiguration && d->networkConfiguration.state().testFlag(QNetworkConfiguration::Undefined)) return UnknownAccessibility; @@ -1434,35 +1458,57 @@ QNetworkReply *QNetworkAccessManager::createRequest(QNetworkAccessManager::Opera } } -#ifndef QT_NO_BEARERMANAGEMENT + if (d->statusMonitor.isEnabled()) { + // See the code in ctor - QNetworkStatusMonitor allows us to + // immediately set 'networkAccessible' even before we start + // the monitor. +#ifdef QT_NO_BEARERMANAGEMENT + if (d->networkAccessible +#else + if (d->networkAccessible == NotAccessible +#endif // QT_NO_BEARERMANAGEMENT + && !isLocalFile) { + QHostAddress dest; + QString host = req.url().host().toLower(); + if (!(dest.setAddress(host) && dest.isLoopback()) + && host != QLatin1String("localhost") + && host != QHostInfo::localHostName().toLower()) { + return new QDisabledNetworkReply(this, req, op); + } + } - // Return a disabled network reply if network access is disabled. - // Except if the scheme is empty or file:// or if the host resolves to a loopback address. - if (d->networkAccessible == NotAccessible && !isLocalFile) { - QHostAddress dest; - QString host = req.url().host().toLower(); - if (!(dest.setAddress(host) && dest.isLoopback()) && host != QLatin1String("localhost") + if (!d->statusMonitor.isMonitoring() && !d->statusMonitor.start()) + qWarning(lcNetMon, "failed to start network status monitoring"); + } else { +#ifndef QT_NO_BEARERMANAGEMENT + // Return a disabled network reply if network access is disabled. + // Except if the scheme is empty or file:// or if the host resolves to a loopback address. + if (d->networkAccessible == NotAccessible && !isLocalFile) { + QHostAddress dest; + QString host = req.url().host().toLower(); + if (!(dest.setAddress(host) && dest.isLoopback()) && host != QLatin1String("localhost") && host != QHostInfo::localHostName().toLower()) { - return new QDisabledNetworkReply(this, req, op); + return new QDisabledNetworkReply(this, req, op); + } } - } - if (!d->networkSessionStrongRef && (d->initializeSession || !d->networkConfiguration.identifier().isEmpty())) { - if (!d->networkConfiguration.identifier().isEmpty()) { - if ((d->networkConfiguration.state() & QNetworkConfiguration::Defined) - && d->networkConfiguration != d->networkConfigurationManager.defaultConfiguration()) - d->createSession(d->networkConfigurationManager.defaultConfiguration()); - else - d->createSession(d->networkConfiguration); + if (!d->networkSessionStrongRef && (d->initializeSession || !d->networkConfiguration.identifier().isEmpty())) { + if (!d->networkConfiguration.identifier().isEmpty()) { + if ((d->networkConfiguration.state() & QNetworkConfiguration::Defined) + && d->networkConfiguration != d->networkConfigurationManager.defaultConfiguration()) + d->createSession(d->networkConfigurationManager.defaultConfiguration()); + else + d->createSession(d->networkConfiguration); - } else { - if (d->networkSessionRequired) - d->createSession(d->networkConfigurationManager.defaultConfiguration()); - else - d->initializeSession = false; + } else { + if (d->networkSessionRequired) + d->createSession(d->networkConfigurationManager.defaultConfiguration()); + else + d->initializeSession = false; + } } - } #endif + } QNetworkRequest request = req; if (!request.header(QNetworkRequest::ContentLengthHeader).isValid() && @@ -1509,8 +1555,10 @@ QNetworkReply *QNetworkAccessManager::createRequest(QNetworkAccessManager::Opera #endif QNetworkReplyHttpImpl *reply = new QNetworkReplyHttpImpl(this, request, op, outgoingData); #ifndef QT_NO_BEARERMANAGEMENT - connect(this, SIGNAL(networkSessionConnected()), - reply, SLOT(_q_networkSessionConnected())); + if (!d->statusMonitor.isEnabled()) { + connect(this, SIGNAL(networkSessionConnected()), + reply, SLOT(_q_networkSessionConnected())); + } #endif return reply; } @@ -1519,7 +1567,9 @@ QNetworkReply *QNetworkAccessManager::createRequest(QNetworkAccessManager::Opera // first step: create the reply QNetworkReplyImpl *reply = new QNetworkReplyImpl(this); #ifndef QT_NO_BEARERMANAGEMENT - if (!isLocalFile) { + // NETMONTODO: network reply impl must be augmented to use the same monitoring + // capabilities as http network reply impl does. + if (!isLocalFile && !d->statusMonitor.isEnabled()) { connect(this, SIGNAL(networkSessionConnected()), reply, SLOT(_q_networkSessionConnected())); } @@ -1988,7 +2038,13 @@ void QNetworkAccessManagerPrivate::_q_networkSessionStateChanged(QNetworkSession void QNetworkAccessManagerPrivate::_q_onlineStateChanged(bool isOnline) { - Q_Q(QNetworkAccessManager); + Q_Q(QNetworkAccessManager); + + if (statusMonitor.isEnabled()) { + networkAccessible = isOnline ? QNetworkAccessManager::Accessible : QNetworkAccessManager::NotAccessible; + return; + } + // if the user set a config, we only care whether this one is active. // Otherwise, this QNAM is online if there is an online config. @@ -2018,6 +2074,9 @@ void QNetworkAccessManagerPrivate::_q_onlineStateChanged(bool isOnline) void QNetworkAccessManagerPrivate::_q_configurationChanged(const QNetworkConfiguration &configuration) { + if (statusMonitor.isEnabled()) + return; + const QString id = configuration.identifier(); if (configuration.state().testFlag(QNetworkConfiguration::Active)) { if (!onlineConfigurations.contains(id)) { @@ -2050,6 +2109,9 @@ void QNetworkAccessManagerPrivate::_q_configurationChanged(const QNetworkConfigu void QNetworkAccessManagerPrivate::_q_networkSessionFailed(QNetworkSession::SessionError) { + if (statusMonitor.isEnabled()) + return; + const auto cfgs = networkConfigurationManager.allConfigurations(); for (const QNetworkConfiguration &cfg : cfgs) { if (cfg.state().testFlag(QNetworkConfiguration::Active)) { @@ -2061,6 +2123,13 @@ void QNetworkAccessManagerPrivate::_q_networkSessionFailed(QNetworkSession::Sess } } +#else + +void QNetworkAccessManagerPrivate::_q_onlineStateChanged(bool isOnline) +{ + networkAccessible = isOnline; +} + #endif // QT_NO_BEARERMANAGEMENT #if QT_CONFIG(http) diff --git a/src/network/access/qnetworkaccessmanager.h b/src/network/access/qnetworkaccessmanager.h index 7e2f7683d0..fa23537c68 100644 --- a/src/network/access/qnetworkaccessmanager.h +++ b/src/network/access/qnetworkaccessmanager.h @@ -209,10 +209,10 @@ private: #ifndef QT_NO_BEARERMANAGEMENT Q_PRIVATE_SLOT(d_func(), void _q_networkSessionClosed()) Q_PRIVATE_SLOT(d_func(), void _q_networkSessionStateChanged(QNetworkSession::State)) - Q_PRIVATE_SLOT(d_func(), void _q_onlineStateChanged(bool)) Q_PRIVATE_SLOT(d_func(), void _q_configurationChanged(const QNetworkConfiguration &)) Q_PRIVATE_SLOT(d_func(), void _q_networkSessionFailed(QNetworkSession::SessionError)) #endif + Q_PRIVATE_SLOT(d_func(), void _q_onlineStateChanged(bool)) }; QT_END_NAMESPACE diff --git a/src/network/access/qnetworkaccessmanager_p.h b/src/network/access/qnetworkaccessmanager_p.h index 5cab4928e4..d3a3936533 100644 --- a/src/network/access/qnetworkaccessmanager_p.h +++ b/src/network/access/qnetworkaccessmanager_p.h @@ -55,6 +55,7 @@ #include "qnetworkaccessmanager.h" #include "qnetworkaccesscache_p.h" #include "qnetworkaccessbackend_p.h" +#include "qnetconmonitor_p.h" #include "qnetworkrequest.h" #include "qhsts_p.h" #include "private/qobject_p.h" @@ -151,6 +152,7 @@ public: QNetworkAccessBackend *findBackend(QNetworkAccessManager::Operation op, const QNetworkRequest &request); QStringList backendSupportedSchemes() const; + void _q_onlineStateChanged(bool isOnline); #ifndef QT_NO_BEARERMANAGEMENT void createSession(const QNetworkConfiguration &config); QSharedPointer getNetworkSession() const; @@ -160,12 +162,11 @@ public: void _q_networkSessionPreferredConfigurationChanged(const QNetworkConfiguration &config, bool isSeamless); void _q_networkSessionStateChanged(QNetworkSession::State state); - void _q_onlineStateChanged(bool isOnline); + void _q_configurationChanged(const QNetworkConfiguration &configuration); void _q_networkSessionFailed(QNetworkSession::SessionError error); QSet onlineConfigurations; - #endif #if QT_CONFIG(http) @@ -199,6 +200,8 @@ public: int activeReplyCount; bool online; bool initializeSession; +#else + bool networkAccessible = true; #endif bool cookieJarCreated; @@ -222,6 +225,7 @@ public: QScopedPointer stsStore; #endif // QT_CONFIG(settings) bool stsEnabled = false; + mutable QNetworkStatusMonitor statusMonitor; #ifndef QT_NO_BEARERMANAGEMENT Q_AUTOTEST_EXPORT static const QWeakPointer getNetworkSession(const QNetworkAccessManager *manager); diff --git a/src/network/access/qnetworkreplyhttpimpl.cpp b/src/network/access/qnetworkreplyhttpimpl.cpp index f801ef0c88..b9651b35d2 100644 --- a/src/network/access/qnetworkreplyhttpimpl.cpp +++ b/src/network/access/qnetworkreplyhttpimpl.cpp @@ -59,6 +59,7 @@ #include #include "qnetworkcookiejar.h" +#include "qnetconmonitor_p.h" #include // for strchr @@ -166,6 +167,11 @@ static QHash parseHttpOptionHeader(const QByteArray &hea #if QT_CONFIG(bearermanagement) static bool isSessionNeeded(const QUrl &url) { + if (QNetworkStatusMonitor::isEnabled()) { + // In case QNetworkStatus/QNetConManager are in business, + // no session, no bearer manager are involved. + return false; + } // Connections to the local machine does not require a session QString host = url.host().toLower(); return !QHostAddress(host).isLoopback() && host != QLatin1String("localhost") @@ -796,7 +802,8 @@ void QNetworkReplyHttpImplPrivate::postRequest(const QNetworkRequest &newHttpReq if (blob.isValid() && blob.canConvert()) delegate->http2Parameters = blob.value(); #ifndef QT_NO_BEARERMANAGEMENT - delegate->networkSession = managerPrivate->getNetworkSession(); + if (!QNetworkStatusMonitor::isEnabled()) + delegate->networkSession = managerPrivate->getNetworkSession(); #endif // For the synchronous HTTP, this is the normal way the delegate gets deleted @@ -1807,7 +1814,7 @@ bool QNetworkReplyHttpImplPrivate::start(const QNetworkRequest &newHttpRequest) { #ifndef QT_NO_BEARERMANAGEMENT QSharedPointer networkSession(managerPrivate->getNetworkSession()); - if (!networkSession) { + if (!networkSession || QNetworkStatusMonitor::isEnabled()) { #endif postRequest(newHttpRequest); return true; @@ -1895,7 +1902,7 @@ void QNetworkReplyHttpImplPrivate::_q_startOperation() // state changes. if (!startWaitForSession(session)) return; - } else if (session) { + } else if (session && !QNetworkStatusMonitor::isEnabled()) { QObject::connect(session.data(), SIGNAL(stateChanged(QNetworkSession::State)), q, SLOT(_q_networkSessionStateChanged(QNetworkSession::State)), Qt::QueuedConnection); @@ -2184,7 +2191,7 @@ void QNetworkReplyHttpImplPrivate::finished() #ifndef QT_NO_BEARERMANAGEMENT Q_ASSERT(managerPrivate); QSharedPointer session = managerPrivate->getNetworkSession(); - if (session && session->state() == QNetworkSession::Roaming && + if (!QNetworkStatusMonitor::isEnabled() && session && session->state() == QNetworkSession::Roaming && state == Working && errorCode != QNetworkReply::OperationCanceledError) { // only content with a known size will fail with a temporary network failure error if (!totalSize.isNull()) { diff --git a/src/network/access/qnetworkreplyimpl.cpp b/src/network/access/qnetworkreplyimpl.cpp index f5bb4d5887..1a02938de9 100644 --- a/src/network/access/qnetworkreplyimpl.cpp +++ b/src/network/access/qnetworkreplyimpl.cpp @@ -1117,7 +1117,6 @@ bool QNetworkReplyImplPrivate::migrateBackend() return true; } -#ifndef QT_NO_BEARERMANAGEMENT QDisabledNetworkReply::QDisabledNetworkReply(QObject *parent, const QNetworkRequest &req, QNetworkAccessManager::Operation op) @@ -1142,7 +1141,6 @@ QDisabledNetworkReply::QDisabledNetworkReply(QObject *parent, QDisabledNetworkReply::~QDisabledNetworkReply() { } -#endif QT_END_NAMESPACE diff --git a/src/network/access/qnetworkreplyimpl_p.h b/src/network/access/qnetworkreplyimpl_p.h index 4881e84e9c..85f5b862a8 100644 --- a/src/network/access/qnetworkreplyimpl_p.h +++ b/src/network/access/qnetworkreplyimpl_p.h @@ -209,7 +209,6 @@ public: }; Q_DECLARE_TYPEINFO(QNetworkReplyImplPrivate::InternalNotifications, Q_PRIMITIVE_TYPE); -#ifndef QT_NO_BEARERMANAGEMENT class QDisabledNetworkReply : public QNetworkReply { Q_OBJECT @@ -223,7 +222,6 @@ public: protected: qint64 readData(char *, qint64) override { return -1; } }; -#endif QT_END_NAMESPACE diff --git a/src/network/kernel/kernel.pri b/src/network/kernel/kernel.pri index b86119b200..0e4cef5e74 100644 --- a/src/network/kernel/kernel.pri +++ b/src/network/kernel/kernel.pri @@ -16,7 +16,8 @@ HEADERS += kernel/qtnetworkglobal.h \ kernel/qnetworkinterface.h \ kernel/qnetworkinterface_p.h \ kernel/qnetworkinterface_unix_p.h \ - kernel/qnetworkproxy.h + kernel/qnetworkproxy.h \ + kernel/qnetconmonitor_p.h SOURCES += kernel/qauthenticator.cpp \ kernel/qhostaddress.cpp \ @@ -71,6 +72,15 @@ mac { !uikit: LIBS_PRIVATE += -framework CoreServices -framework SystemConfiguration } +macos | ios { + OBJECTIVE_SOURCES += \ + kernel/qnetconmonitor_darwin.mm + + LIBS_PRIVATE += -framework SystemConfiguration +} else { + SOURCES += kernel/qnetconmonitor_stub.cpp +} + qtConfig(gssapi): LIBS_PRIVATE += -lgssapi_krb5 uikit:HEADERS += kernel/qnetworkinterface_uikit_p.h diff --git a/src/network/kernel/qnetconmonitor_darwin.mm b/src/network/kernel/qnetconmonitor_darwin.mm new file mode 100644 index 0000000000..322c87cb4b --- /dev/null +++ b/src/network/kernel/qnetconmonitor_darwin.mm @@ -0,0 +1,434 @@ +/**************************************************************************** +** +** Copyright (C) 2019 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "private/qnativesocketengine_p.h" +#include "private/qnetconmonitor_p.h" + +#include "private/qobject_p.h" + +#include +#include + +#include + +#include +#include + +QT_BEGIN_NAMESPACE + +Q_LOGGING_CATEGORY(lcNetMon, "qt.network.monitor"); + +namespace { + +class ReachabilityDispatchQueue +{ +public: + ReachabilityDispatchQueue() + { + queue = dispatch_queue_create("qt-network-reachability-queue", nullptr); + if (!queue) + qCWarning(lcNetMon, "Failed to create a dispatch queue for reachability probes"); + } + + ~ReachabilityDispatchQueue() + { + if (queue) + dispatch_release(queue); + } + + dispatch_queue_t data() const + { + return queue; + } + +private: + dispatch_queue_t queue = nullptr; + + Q_DISABLE_COPY_MOVE(ReachabilityDispatchQueue) +}; + +dispatch_queue_t qt_reachability_queue() +{ + static const ReachabilityDispatchQueue reachabilityQueue; + return reachabilityQueue.data(); +} + +qt_sockaddr qt_hostaddress_to_sockaddr(const QHostAddress &src) +{ + if (src.isNull()) + return {}; + + qt_sockaddr dst; + if (src.protocol() == QAbstractSocket::IPv4Protocol) { + dst.a4 = sockaddr_in{}; + dst.a4.sin_family = AF_INET; + dst.a4.sin_addr.s_addr = htonl(src.toIPv4Address()); + dst.a4.sin_len = sizeof(sockaddr_in); + } else if (src.protocol() == QAbstractSocket::IPv6Protocol) { + dst.a6 = sockaddr_in6{}; + dst.a6.sin6_family = AF_INET6; + dst.a6.sin6_len = sizeof(sockaddr_in6); + const Q_IPV6ADDR ipv6 = src.toIPv6Address(); + std::memcpy(&dst.a6.sin6_addr, &ipv6, sizeof ipv6); + } else { + Q_UNREACHABLE(); + } + + return dst; +} + +} // unnamed namespace + +class QNetworkConnectionMonitorPrivate : public QObjectPrivate +{ +public: + SCNetworkReachabilityRef probe = nullptr; + SCNetworkReachabilityFlags state = kSCNetworkReachabilityFlagsIsLocalAddress; + bool scheduled = false; + + void updateState(SCNetworkReachabilityFlags newState); + void reset(); + bool isReachable() const; + + static void probeCallback(SCNetworkReachabilityRef probe, SCNetworkReachabilityFlags flags, void *info); + + Q_DECLARE_PUBLIC(QNetworkConnectionMonitor) +}; + +void QNetworkConnectionMonitorPrivate::updateState(SCNetworkReachabilityFlags newState) +{ + // To be executed only on the reachability queue. + Q_Q(QNetworkConnectionMonitor); + + // NETMONTODO: for now, 'online' for us means kSCNetworkReachabilityFlagsReachable + // is set. There are more possible flags that require more tests/some special + // setup. So in future this part and related can change/be extended. + const bool wasReachable = isReachable(); + state = newState; + if (wasReachable != isReachable()) + emit q->reachabilityChanged(isReachable()); +} + +void QNetworkConnectionMonitorPrivate::reset() +{ + if (probe) { + CFRelease(probe); + probe = nullptr; + } + + state = kSCNetworkReachabilityFlagsIsLocalAddress; + scheduled = false; +} + +bool QNetworkConnectionMonitorPrivate::isReachable() const +{ + return !!(state & kSCNetworkReachabilityFlagsReachable); +} + +void QNetworkConnectionMonitorPrivate::probeCallback(SCNetworkReachabilityRef probe, SCNetworkReachabilityFlags flags, void *info) +{ + // To be executed only on the reachability queue. + Q_UNUSED(probe); + + auto monitorPrivate = static_cast(info); + Q_ASSERT(monitorPrivate); + monitorPrivate->updateState(flags); +} + +QNetworkConnectionMonitor::QNetworkConnectionMonitor() + : QObject(*new QNetworkConnectionMonitorPrivate) +{ +} + +QNetworkConnectionMonitor::QNetworkConnectionMonitor(const QHostAddress &local, const QHostAddress &remote) + : QObject(*new QNetworkConnectionMonitorPrivate) +{ + setTargets(local, remote); +} + +QNetworkConnectionMonitor::~QNetworkConnectionMonitor() +{ + Q_D(QNetworkConnectionMonitor); + + stopMonitoring(); + d->reset(); +} + +bool QNetworkConnectionMonitor::setTargets(const QHostAddress &local, const QHostAddress &remote) +{ + Q_D(QNetworkConnectionMonitor); + + if (isMonitoring()) { + qCWarning(lcNetMon, "Monitor is already active, call stopMonitoring() first"); + return false; + } + + if (local.isNull()) { + qCWarning(lcNetMon, "Invalid (null) local address, cannot create a reachability target"); + return false; + } + + // Clear the old target if needed: + d->reset(); + + qt_sockaddr client = qt_hostaddress_to_sockaddr(local); + if (remote.isNull()) { + // That's a special case our QNetworkStatusMonitor is using (AnyIpv4/6 address to check an overall status). + d->probe = SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, reinterpret_cast(&client)); + } else { + qt_sockaddr target = qt_hostaddress_to_sockaddr(remote); + d->probe = SCNetworkReachabilityCreateWithAddressPair(kCFAllocatorDefault, + reinterpret_cast(&client), + reinterpret_cast(&target)); + } + + if (d->probe) { + // Let's read the initial state so that callback coming later can + // see a difference. Ignore errors though. + SCNetworkReachabilityGetFlags(d->probe, &d->state); + }else { + qCWarning(lcNetMon, "Failed to create network reachability probe"); + return false; + } + + return true; +} + +bool QNetworkConnectionMonitor::startMonitoring() +{ + Q_D(QNetworkConnectionMonitor); + + if (isMonitoring()) { + qCWarning(lcNetMon, "Monitor is already active, call stopMonitoring() first"); + return false; + } + + if (!d->probe) { + qCWarning(lcNetMon, "Can not start monitoring, set targets first"); + return false; + } + + auto queue = qt_reachability_queue(); + if (!queue) { + qWarning(lcNetMon, "Failed to create a dispatch queue to schedule a probe on"); + return false; + } + + SCNetworkReachabilityContext context = {}; + context.info = d; + if (!SCNetworkReachabilitySetCallback(d->probe, QNetworkConnectionMonitorPrivate::probeCallback, &context)) { + qWarning(lcNetMon, "Failed to set a reachability callback"); + return false; + } + + + if (!SCNetworkReachabilitySetDispatchQueue(d->probe, queue)) { + qWarning(lcNetMon, "Failed to schedule a reachability callback on a queue"); + return false; + } + + return d->scheduled = true; +} + +bool QNetworkConnectionMonitor::isMonitoring() const +{ + Q_D(const QNetworkConnectionMonitor); + + return d->scheduled; +} + +void QNetworkConnectionMonitor::stopMonitoring() +{ + Q_D(QNetworkConnectionMonitor); + + if (d->scheduled) { + Q_ASSERT(d->probe); + SCNetworkReachabilitySetDispatchQueue(d->probe, nullptr); + SCNetworkReachabilitySetCallback(d->probe, nullptr, nullptr); + d->scheduled = false; + } +} + +bool QNetworkConnectionMonitor::isReachable() +{ + Q_D(QNetworkConnectionMonitor); + + if (isMonitoring()) { + qCWarning(lcNetMon, "Calling isReachable() is unsafe after the monitoring started"); + return false; + } + + if (!d->probe) { + qCWarning(lcNetMon, "Reachability is unknown, set the target first"); + return false; + } + + return d->isReachable(); +} + +class QNetworkStatusMonitorPrivate : public QObjectPrivate +{ +public: + QNetworkConnectionMonitor ipv4Probe; + bool isOnlineIpv4 = false; + QNetworkConnectionMonitor ipv6Probe; + bool isOnlineIpv6 = false; + + static bool enabled; + static void readEnv(); +}; + +bool QNetworkStatusMonitorPrivate::enabled = false; + +void QNetworkStatusMonitorPrivate::readEnv() +{ + bool envOk = false; + const int env = qEnvironmentVariableIntValue("QT_USE_NETWORK_MONITOR", &envOk); + enabled = envOk && env > 0; +} + +QNetworkStatusMonitor::QNetworkStatusMonitor() + : QObject(*new QNetworkStatusMonitorPrivate) +{ + Q_D(QNetworkStatusMonitor); + + if (d->ipv4Probe.setTargets(QHostAddress::AnyIPv4, {})) { + // We manage to create SCNetworkReachabilityRef for IPv4, let's + // read the last known state then! + d->isOnlineIpv4 = d->ipv4Probe.isReachable(); + } + + if (d->ipv6Probe.setTargets(QHostAddress::AnyIPv6, {})) { + // We manage to create SCNetworkReachability ref for IPv6, let's + // read the last known state then! + d->isOnlineIpv6 = d->ipv6Probe.isReachable(); + } + + + connect(&d->ipv4Probe, &QNetworkConnectionMonitor::reachabilityChanged, this, + &QNetworkStatusMonitor::reachabilityChanged, Qt::QueuedConnection); + connect(&d->ipv6Probe, &QNetworkConnectionMonitor::reachabilityChanged, this, + &QNetworkStatusMonitor::reachabilityChanged, Qt::QueuedConnection); +} + +QNetworkStatusMonitor::~QNetworkStatusMonitor() +{ + Q_D(QNetworkStatusMonitor); + + d->ipv4Probe.disconnect(); + d->ipv4Probe.stopMonitoring(); + d->ipv6Probe.disconnect(); + d->ipv6Probe.stopMonitoring(); +} + +bool QNetworkStatusMonitor::start() +{ + Q_D(QNetworkStatusMonitor); + + if (isMonitoring()) { + qCWarning(lcNetMon, "Network status monitor is already active"); + return true; + } + + d->ipv4Probe.startMonitoring(); + d->ipv6Probe.startMonitoring(); + + return isMonitoring(); +} + +void QNetworkStatusMonitor::stop() +{ + Q_D(QNetworkStatusMonitor); + + if (d->ipv4Probe.isMonitoring()) + d->ipv4Probe.stopMonitoring(); + if (d->ipv6Probe.isMonitoring()) + d->ipv6Probe.stopMonitoring(); +} + +bool QNetworkStatusMonitor::isMonitoring() const +{ + Q_D(const QNetworkStatusMonitor); + + return d->ipv4Probe.isMonitoring() || d->ipv6Probe.isMonitoring(); +} + +bool QNetworkStatusMonitor::isNetworkAccesible() +{ + // This function is to be executed on the thread that created + // and uses 'this'. + Q_D(QNetworkStatusMonitor); + + return d->isOnlineIpv4 || d->isOnlineIpv6; +} + +bool QNetworkStatusMonitor::isEnabled() +{ + static std::once_flag envRead = {}; + std::call_once(envRead, QNetworkStatusMonitorPrivate::readEnv); + return QNetworkStatusMonitorPrivate::enabled; +} + +void QNetworkStatusMonitor::reachabilityChanged(bool online) +{ + // This function is executed on the thread that created/uses 'this', + // not on the reachability queue. + Q_D(QNetworkStatusMonitor); + + auto probe = qobject_cast(sender()); + if (!probe) + return; + + const bool isIpv4 = probe == &d->ipv4Probe; + bool &probeOnline = isIpv4 ? d->isOnlineIpv4 : d->isOnlineIpv6; + bool otherOnline = isIpv4 ? d->isOnlineIpv6 : d->isOnlineIpv4; + + if (probeOnline == online) { + // We knew this already? + return; + } + + probeOnline = online; + if (!otherOnline) { + // We either just lost or got a network access. + emit onlineStateChanged(probeOnline); + } +} + +QT_END_NAMESPACE diff --git a/src/network/kernel/qnetconmonitor_p.h b/src/network/kernel/qnetconmonitor_p.h new file mode 100644 index 0000000000..74ee56d422 --- /dev/null +++ b/src/network/kernel/qnetconmonitor_p.h @@ -0,0 +1,126 @@ +/**************************************************************************** +** +** Copyright (C) 2019 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 QNETCONMONITOR_P_H +#define QNETCONMONITOR_P_H + +#include + +#include +#include +#include +#include + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +QT_BEGIN_NAMESPACE + +class QNetworkConnectionMonitorPrivate; +class QNetworkConnectionMonitor : public QObject +{ + Q_OBJECT + +public: + QNetworkConnectionMonitor(); + QNetworkConnectionMonitor(const QHostAddress &local, const QHostAddress &remote = {}); + ~QNetworkConnectionMonitor(); + + bool setTargets(const QHostAddress &local, const QHostAddress &remote); + bool isReachable(); + + // Important: on Darwin you should not call isReachable() after + // startMonitoring(), you have to listen to reachabilityChanged() + // signal instead. + bool startMonitoring(); + bool isMonitoring() const; + void stopMonitoring(); + +Q_SIGNALS: + // Important: connect to this using QueuedConnection. On Darwin + // callback is coming on a special dispatch queue. + void reachabilityChanged(bool isOnline); + +private: + Q_DECLARE_PRIVATE(QNetworkConnectionMonitor) + Q_DISABLE_COPY_MOVE(QNetworkConnectionMonitor) +}; + +class QNetworkStatusMonitorPrivate; +class QNetworkStatusMonitor : public QObject +{ + Q_OBJECT + +public: + QNetworkStatusMonitor(); + ~QNetworkStatusMonitor(); + + bool isNetworkAccesible(); + + bool start(); + void stop(); + bool isMonitoring() const; + + static bool isEnabled(); + +Q_SIGNALS: + // Unlike QNetworkConnectionMonitor, this can be connected to directly. + void onlineStateChanged(bool isOnline); + +private slots: + void reachabilityChanged(bool isOnline); + +private: + Q_DECLARE_PRIVATE(QNetworkStatusMonitor) + Q_DISABLE_COPY_MOVE(QNetworkStatusMonitor) +}; + +Q_DECLARE_LOGGING_CATEGORY(lcNetMon) + +QT_END_NAMESPACE + +#endif // QNETCONMONITOR_P_H diff --git a/src/network/kernel/qnetconmonitor_stub.cpp b/src/network/kernel/qnetconmonitor_stub.cpp new file mode 100644 index 0000000000..7f3a0c44c6 --- /dev/null +++ b/src/network/kernel/qnetconmonitor_stub.cpp @@ -0,0 +1,141 @@ +/**************************************************************************** +** +** Copyright (C) 2019 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qnetconmonitor_p.h" + +#include "private/qobject_p.h" + +QT_BEGIN_NAMESPACE + +Q_LOGGING_CATEGORY(lcNetMon, "qt.network.monitor"); + +// Note: this 'stub' version is never enabled (see QNetworkStatusMonitor::isEnabled below) +// and thus should never affect QNAM in any unusuall way. Having this 'stub' version is similar +// to building Qt with bearer management configured out. + +class QNetworkConnectionMonitorPrivate : public QObjectPrivate +{ +}; + +QNetworkConnectionMonitor::QNetworkConnectionMonitor() + : QObject(*new QNetworkConnectionMonitorPrivate) +{ +} + +QNetworkConnectionMonitor::QNetworkConnectionMonitor(const QHostAddress &local, const QHostAddress &remote) + : QObject(*new QNetworkConnectionMonitorPrivate) +{ + Q_UNUSED(local) + Q_UNUSED(remote) +} + +QNetworkConnectionMonitor::~QNetworkConnectionMonitor() +{ +} + +bool QNetworkConnectionMonitor::setTargets(const QHostAddress &local, const QHostAddress &remote) +{ + Q_UNUSED(local) + Q_UNUSED(remote) + + return false; +} + +bool QNetworkConnectionMonitor::startMonitoring() +{ + return false; +} + +bool QNetworkConnectionMonitor::isMonitoring() const +{ + return false; +} + +void QNetworkConnectionMonitor::stopMonitoring() +{ +} + +bool QNetworkConnectionMonitor::isReachable() +{ + return false; +} + +class QNetworkStatusMonitorPrivate : public QObjectPrivate +{ +}; + +QNetworkStatusMonitor::QNetworkStatusMonitor() + : QObject(*new QNetworkStatusMonitorPrivate) +{ +} + +QNetworkStatusMonitor::~QNetworkStatusMonitor() +{ +} + +bool QNetworkStatusMonitor::start() +{ + return false; +} + +void QNetworkStatusMonitor::stop() +{ +} + +bool QNetworkStatusMonitor::isMonitoring() const +{ + return false; +} + +bool QNetworkStatusMonitor::isNetworkAccesible() +{ + return false; +} + +bool QNetworkStatusMonitor::isEnabled() +{ + return false; +} + +void QNetworkStatusMonitor::reachabilityChanged(bool online) +{ + Q_UNUSED(online) +} + +QT_END_NAMESPACE -- cgit v1.2.3