7 files changed, 58 insertions, 27 deletions
diff --git a/examples/network/doc/src/http.qdoc b/examples/network/doc/src/http.qdoc
index a07d0fe73b0..e8ebc907e92 100644
--- a/examples/network/doc/src/http.qdoc
+++ b/examples/network/doc/src/http.qdoc
@@ -18,6 +18,15 @@
     The main work of this example is done in the HttpWindow class.
     Thus we will focus on that.
 
+    \snippet http/httpwindow.cpp qnam-tcpkeepalive
+
+    Since Qt 6.11, it is possible to explicitly specify the TCP keepalive
+    parameters for a QNetworkRequest. In the snippet above, we are overriding
+    the defaults used by QNetworkAccessManager to follow a more aggressive
+    strategy. This can be useful, for example, in early detection of network
+    hangs caused by network changes on Linux. In this particular example, the
+    connection will be closed after thirty seconds of inactivity.
+
     \snippet http/httpwindow.cpp qnam-download
 
     Using QNetworkAccessManager, we begin the download of a resource as
diff --git a/examples/network/http/httpwindow.cpp b/examples/network/http/httpwindow.cpp
index 3d1c2467d84..3a4ae098321 100644
--- a/examples/network/http/httpwindow.cpp
+++ b/examples/network/http/httpwindow.cpp
@@ -10,6 +10,8 @@
 #include <QUrl>
 
 #include <memory>
+#include <chrono>
+using namespace std::chrono_literals;
 
 #if QT_CONFIG(ssl)
 const char defaultUrl[] = "https://www.qt.io/";
@@ -95,8 +97,15 @@ void HttpWindow::startRequest(const QUrl &requestedUrl)
     url = requestedUrl;
     httpRequestAborted = false;
 
+    //! [qnam-tcpkeepalive]
+    QNetworkRequest networkRequest(url);
+    networkRequest.setTcpKeepAliveIdleTimeBeforeProbes(20s);
+    networkRequest.setTcpKeepAliveIntervalBetweenProbes(2s);
+    networkRequest.setTcpKeepAliveProbeCount(5);
+    //! [qnam-tcpkeepalive]
+
     //! [qnam-download]
-    reply.reset(qnam.get(QNetworkRequest(url)));
+    reply.reset(qnam.get(networkRequest));
     //! [qnam-download]
     //! [connecting-reply-to-slots]
     connect(reply.get(), &QNetworkReply::finished, this, &HttpWindow::httpFinished);
diff --git a/src/corelib/text/qregularexpression.cpp b/src/corelib/text/qregularexpression.cpp
index 5cc8e8681bb..0c65e18ec10 100644
--- a/src/corelib/text/qregularexpression.cpp
+++ b/src/corelib/text/qregularexpression.cpp
@@ -952,7 +952,7 @@ void QRegularExpressionPrivate::getPatternInfo()
 namespace {
 struct PcreJitStackFree
 {
-    void operator()(pcre2_jit_stack_16 *stack)
+    void operator()(pcre2_jit_stack_16 *stack) const
     {
         if (stack)
             pcre2_jit_stack_free_16(stack);
diff --git a/src/network/access/qnetworkaccessmanager.cpp b/src/network/access/qnetworkaccessmanager.cpp
index 6428653de26..66bb65685fa 100644
--- a/src/network/access/qnetworkaccessmanager.cpp
+++ b/src/network/access/qnetworkaccessmanager.cpp
@@ -216,6 +216,19 @@ static void ensureInitialized()
     can be:
     \snippet code/src_network_access_qnetworkaccessmanager.cpp 1
 
+    Since Qt 6.11 the defaults of the TCP Keepalive parameters used by
+    QNetworkAccessManager have been changed. With the current settings
+    the connection will be terminated after 2 minutes of inactivity.
+
+    These settings can be changed the individual requests, to make
+    them more lenient, or even more aggressive via the QNetworkRequest API.
+    \snippet http/httpwindow.cpp qnam-tcpkeepalive
+
+    In the above snippet we are picking a more aggressive strategy, to
+    terminate the connection after thirty seconds of inactivity. This can
+    be useful, for example, in early detection of network hangs caused
+    by network changes on Linux.
+
     \sa QNetworkRequest, QNetworkReply, QNetworkProxy
 */
 
diff --git a/src/widgets/dialogs/qwizard.cpp b/src/widgets/dialogs/qwizard.cpp
index e23ed9f23ee..58a4115374e 100644
--- a/src/widgets/dialogs/qwizard.cpp
+++ b/src/widgets/dialogs/qwizard.cpp
@@ -259,7 +259,7 @@ public:
     void setup(const QWizardLayoutInfo &info, const QString &title,
                const QString &subTitle, const QPixmap &logo, const QPixmap &banner,
                Qt::TextFormat titleFormat, Qt::TextFormat subTitleFormat,
-               QWizard::BannerSizePolicy bannerSizePolicy);
+               QWizard::BannerStretchPolicy bannerStretchPolicy);
 
 protected:
     void paintEvent(QPaintEvent *event) override;
@@ -273,7 +273,7 @@ private:
     QLabel *logoLabel;
     QGridLayout *layout;
     QPixmap bannerPixmap;
-    QWizard::BannerSizePolicy wizardBannerSizePolicy = QWizard::BannerSizePolicy::NoStretch;
+    QWizard::BannerStretchPolicy wizardBannerStretchPolicy = QWizard::BannerStretchPolicy::NoStretch;
 };
 
 QWizardHeader::QWizardHeader(QWidget *parent)
@@ -329,7 +329,7 @@ bool QWizardHeader::vistaDisabled() const
 void QWizardHeader::setup(const QWizardLayoutInfo &info, const QString &title,
                           const QString &subTitle, const QPixmap &logo, const QPixmap &banner,
                           Qt::TextFormat titleFormat, Qt::TextFormat subTitleFormat,
-                          QWizard::BannerSizePolicy bannerSizePolicy)
+                          QWizard::BannerStretchPolicy bannerStretchPolicy)
 {
     bool modern = ((info.wizStyle == QWizard::ModernStyle)
 #if QT_CONFIG(style_windowsvista)
@@ -337,7 +337,7 @@ void QWizardHeader::setup(const QWizardLayoutInfo &info, const QString &title,
 #endif
     );
 
-    wizardBannerSizePolicy = bannerSizePolicy;
+    wizardBannerStretchPolicy = bannerStretchPolicy;
 
     layout->setRowMinimumHeight(0, modern ? ModernHeaderTopMargin : 0);
     layout->setRowMinimumHeight(1, modern ? info.topLevelMarginTop - ModernHeaderTopMargin - 1 : 0);
@@ -364,7 +364,7 @@ void QWizardHeader::setup(const QWizardLayoutInfo &info, const QString &title,
         bannerPixmap = QPixmap();
     }
 
-    if (bannerPixmap.isNull() || wizardBannerSizePolicy != QWizard::BannerSizePolicy::NoStretch) {
+    if (bannerPixmap.isNull() || wizardBannerStretchPolicy != QWizard::BannerStretchPolicy::NoStretch) {
         /*
             There is no widthForHeight() function, so we simulate it with a loop.
         */
@@ -392,12 +392,12 @@ void QWizardHeader::setup(const QWizardLayoutInfo &info, const QString &title,
 void QWizardHeader::paintEvent(QPaintEvent * /* event */)
 {
     QStylePainter painter(this);
-    switch (wizardBannerSizePolicy) {
-    case QWizard::BannerSizePolicy::Stretch:
+    switch (wizardBannerStretchPolicy) {
+    case QWizard::BannerStretchPolicy::Stretch:
         painter.setRenderHint(QPainter::SmoothPixmapTransform);
         painter.drawPixmap(0, 0, width(), height(), bannerPixmap);
         break;
-    case QWizard::BannerSizePolicy::NoStretch:
+    case QWizard::BannerStretchPolicy::NoStretch:
         painter.drawPixmap(0, 0, bannerPixmap);
         break;
     }
@@ -582,7 +582,7 @@ public:
     QList<QWizard::WizardButton> buttonsCustomLayout;
     Qt::TextFormat titleFmt = Qt::AutoText;
     Qt::TextFormat subTitleFmt = Qt::AutoText;
-    QWizard::BannerSizePolicy bannerSizePolicy = QWizard::BannerSizePolicy::NoStretch;
+    QWizard::BannerStretchPolicy bannerStretchPolicy = QWizard::BannerStretchPolicy::NoStretch;
     mutable QPixmap defaultPixmaps[QWizard::NPixmaps];
 
     union {
@@ -1238,7 +1238,7 @@ void QWizardPrivate::updateLayout()
         Q_ASSERT(page);
         headerWidget->setup(info, page->title(), page->subTitle(),
                             page->pixmap(QWizard::LogoPixmap), page->pixmap(QWizard::BannerPixmap),
-                            titleFmt, subTitleFmt, bannerSizePolicy);
+                            titleFmt, subTitleFmt, bannerStretchPolicy);
     }
 
     if (info.watermark || info.sideWidget) {
@@ -2097,7 +2097,7 @@ void QWizardAntiFlickerWidget::paintEvent(QPaintEvent *)
 */
 
 /*!
-    \enum QWizard::BannerSizePolicy
+    \enum QWizard::BannerStretchPolicy
 
     This enum specifies the banner size policy when there is a banner.
 
@@ -2800,25 +2800,25 @@ Qt::TextFormat QWizard::subTitleFormat() const
 }
 
 /*!
-    \property QWizard::bannerSizePolicy
+    \property QWizard::bannerStretchPolicy
     \brief the banner size policy
 
     The default policy is \l{QWizard::}{NoStretch}
 */
-void QWizard::setBannerSizePolicy(QWizard::BannerSizePolicy bannerSizePolicy)
+void QWizard::setBannerStretchPolicy(QWizard::BannerStretchPolicy bannerStretchPolicy)
 {
     Q_D(QWizard);
-    if (d->bannerSizePolicy == bannerSizePolicy)
+    if (d->bannerStretchPolicy == bannerStretchPolicy)
         return;
 
-    d->bannerSizePolicy = bannerSizePolicy;
+    d->bannerStretchPolicy = bannerStretchPolicy;
     d->updateLayout();
 }
 
-QWizard::BannerSizePolicy QWizard::bannerSizePolicy() const
+QWizard::BannerStretchPolicy QWizard::bannerStretchPolicy() const
 {
     Q_D(const QWizard);
-    return d->bannerSizePolicy;
+    return d->bannerStretchPolicy;
 }
 
 /*!
diff --git a/src/widgets/dialogs/qwizard.h b/src/widgets/dialogs/qwizard.h
index 801fd7f4ef4..a421b3ecb40 100644
--- a/src/widgets/dialogs/qwizard.h
+++ b/src/widgets/dialogs/qwizard.h
@@ -25,7 +25,7 @@ class Q_WIDGETS_EXPORT QWizard : public QDialog
     Q_PROPERTY(Qt::TextFormat subTitleFormat READ subTitleFormat WRITE setSubTitleFormat)
     Q_PROPERTY(int startId READ startId WRITE setStartId)
     Q_PROPERTY(int currentId READ currentId WRITE setCurrentId NOTIFY currentIdChanged)
-    Q_PROPERTY(BannerSizePolicy bannerSizePolicy READ bannerSizePolicy WRITE setBannerSizePolicy REVISION(6, 11))
+    Q_PROPERTY(BannerStretchPolicy bannerStretchPolicy READ bannerStretchPolicy WRITE setBannerStretchPolicy REVISION(6, 11))
 
 public:
     enum WizardButton {
@@ -62,11 +62,11 @@ public:
     };
     Q_ENUM(WizardStyle)
 
-    enum class BannerSizePolicy {
+    enum class BannerStretchPolicy {
         NoStretch,
         Stretch,
     };
-    Q_ENUM(BannerSizePolicy)
+    Q_ENUM(BannerStretchPolicy)
 
     enum WizardOption {
         IndependentPages                = 0x00000001,
@@ -131,8 +131,8 @@ public:
     Qt::TextFormat titleFormat() const;
     void setSubTitleFormat(Qt::TextFormat format);
     Qt::TextFormat subTitleFormat() const;
-    void setBannerSizePolicy(BannerSizePolicy bannerSizePolicy);
-    QWizard::BannerSizePolicy bannerSizePolicy() const;
+    void setBannerStretchPolicy(BannerStretchPolicy bannerStretchPolicy);
+    QWizard::BannerStretchPolicy bannerStretchPolicy() const;
     void setPixmap(WizardPixmap which, const QPixmap &pixmap);
     QPixmap pixmap(WizardPixmap which) const;
 
diff --git a/tests/auto/widgets/dialogs/qwizard/tst_qwizard.cpp b/tests/auto/widgets/dialogs/qwizard/tst_qwizard.cpp
index 560c725fd3f..2c14a408804 100644
--- a/tests/auto/widgets/dialogs/qwizard/tst_qwizard.cpp
+++ b/tests/auto/widgets/dialogs/qwizard/tst_qwizard.cpp
@@ -449,12 +449,12 @@ void tst_QWizard::setPixmap()
     int newWidth = 1240;
     wizard.resize(newWidth, 720);
     QCOMPARE(wizard.width(), oldWidth);
-    wizard.setBannerSizePolicy(QWizard::BannerSizePolicy::Stretch);
+    wizard.setBannerStretchPolicy(QWizard::BannerStretchPolicy::Stretch);
     wizard.resize(newWidth, 720);
     QCOMPARE(wizard.width(), newWidth);
-    wizard.setBannerSizePolicy(QWizard::BannerSizePolicy::NoStretch);
+    wizard.setBannerStretchPolicy(QWizard::BannerStretchPolicy::NoStretch);
     QCOMPARE(wizard.width(), oldWidth);
-    wizard.setBannerSizePolicy(QWizard::BannerSizePolicy::Stretch);
+    wizard.setBannerStretchPolicy(QWizard::BannerStretchPolicy::Stretch);
     wizard.resize(newWidth, 720);
     QCOMPARE(wizard.width(), newWidth);
 }