- if(!server.listen(QHostAddress::AnyIPv6, port)) {
- qWarning("%s", qPrintable(QString("Could not open GUI client port %1: %2").arg(port).arg(server.errorString())));
- return false;
+ bool success = false;
+
+ // let's see if ipv6 is available
+ success = server.listen(QHostAddress::AnyIPv6, port);
+
+ if(!success && server.serverError() == QAbstractSocket::UnsupportedSocketOperationError) {
+ // fall back to v4
+ success = server.listen(QHostAddress::Any, port);