4 files changed, 28 insertions, 15 deletions
diff --git a/src/remoteobjects/qremoteobjectnode.cpp b/src/remoteobjects/qremoteobjectnode.cpp
index f095e1e..5d86605 100644
--- a/src/remoteobjects/qremoteobjectnode.cpp
+++ b/src/remoteobjects/qremoteobjectnode.cpp
@@ -1337,6 +1337,7 @@ void QRemoteObjectNodePrivate::onClientRead(QObject *obj)
     \value MissingObjectName The given QObject does not have objectName() set.
     \value HostUrlInvalid The given url has an invalid or unrecognized scheme.
     \value ProtocolMismatch The client and the server have different protocol versions.
+    \value ListenFailed Can't listen on the specified host port.
 */
 
 /*!
@@ -1599,6 +1600,13 @@ bool QRemoteObjectHostBase::setHostUrl(const QUrl &hostAddress, AllowedSchemas a
     }
     d->remoteObjectIo = new QRemoteObjectSourceIo(hostAddress, this);
 
+    if (allowedSchemas == AllowedSchemas::BuiltInSchemasOnly && !d->remoteObjectIo->startListening()) {
+        d->setLastError(ListenFailed);
+        delete d->remoteObjectIo;
+        d->remoteObjectIo = nullptr;
+        return false;
+    }
+
     //If we've given a name to the node, set it on the sourceIo as well
     if (!objectName().isEmpty())
         d->remoteObjectIo->setObjectName(objectName());
diff --git a/src/remoteobjects/qremoteobjectnode.h b/src/remoteobjects/qremoteobjectnode.h
index f2d00d6..d69b369 100644
--- a/src/remoteobjects/qremoteobjectnode.h
+++ b/src/remoteobjects/qremoteobjectnode.h
@@ -96,7 +96,8 @@ public:
         SourceNotRegistered,
         MissingObjectName,
         HostUrlInvalid,
-        ProtocolMismatch
+        ProtocolMismatch,
+        ListenFailed
     };
     Q_ENUM(ErrorCode)
 
diff --git a/src/remoteobjects/qremoteobjectsourceio.cpp b/src/remoteobjects/qremoteobjectsourceio.cpp
index d864ed5..c5bf36e 100644
--- a/src/remoteobjects/qremoteobjectsourceio.cpp
+++ b/src/remoteobjects/qremoteobjectsourceio.cpp
@@ -54,21 +54,10 @@ QRemoteObjectSourceIo::QRemoteObjectSourceIo(const QUrl &address, QObject *paren
     : QObject(parent)
     , m_server(QtROServerFactory::instance()->isValid(address) ?
                QtROServerFactory::instance()->create(address, this) : nullptr)
+    , m_address(address)
 {
-    if (m_server && m_server->listen(address)) {
-        qRODebug(this) << "QRemoteObjectSourceIo is Listening" << address;
-    } else {
-        if (m_server) {
-            qROWarning(this) << "Listen failed for URL:" << address;
-            qROWarning(this) << m_server->serverError();
-        } else {
-            m_address = address;
-            qRODebug(this) << "Using" << address << "as external url.";
-        }
-        return;
-    }
-
-    connect(m_server.data(), &QConnectionAbstractServer::newConnection, this, &QRemoteObjectSourceIo::handleConnection);
+    if (m_server == nullptr)
+        qRODebug(this) << "Using" << m_address << "as external url.";
 }
 
 QRemoteObjectSourceIo::QRemoteObjectSourceIo(QObject *parent)
@@ -82,6 +71,20 @@ QRemoteObjectSourceIo::~QRemoteObjectSourceIo()
     qDeleteAll(m_sourceRoots.values());
 }
 
+bool QRemoteObjectSourceIo::startListening()
+{
+    if (!m_server->listen(m_address)) {
+        qROCritical(this) << "Listen failed for URL:" << m_address;
+        qROCritical(this) << m_server->serverError();
+        return false;
+    }
+
+    qRODebug(this) << "QRemoteObjectSourceIo is Listening" << m_address;
+    connect(m_server.data(), &QConnectionAbstractServer::newConnection, this,
+            &QRemoteObjectSourceIo::handleConnection);
+    return true;
+}
+
 bool QRemoteObjectSourceIo::enableRemoting(QObject *object, const QMetaObject *meta, const QString &name, const QString &typeName)
 {
     if (m_sourceRoots.contains(name)) {
diff --git a/src/remoteobjects/qremoteobjectsourceio_p.h b/src/remoteobjects/qremoteobjectsourceio_p.h
index 4cc045c..59f9888 100644
--- a/src/remoteobjects/qremoteobjectsourceio_p.h
+++ b/src/remoteobjects/qremoteobjectsourceio_p.h
@@ -73,6 +73,7 @@ public:
     explicit QRemoteObjectSourceIo(QObject *parent = nullptr);
     ~QRemoteObjectSourceIo() override;
 
+    bool startListening();
     bool enableRemoting(QObject *object, const QMetaObject *meta, const QString &name,
                         const QString &typeName);
     bool enableRemoting(QObject *object, const SourceApiMap *api, QObject *adapter = nullptr);