Back to Doc.qt.io
Contact Us Blog Download Qt

QKnxNetIpRoutingSystemBroadcastProxy Class

The QKnxNetIpRoutingSystemBroadcastProxy class provides the means to introspect a generic routing system broadcast QKnxNetIpFrame and to create a KNXnet/IP frame based on the information. More...

Header: #include <QKnxNetIpRoutingSystemBroadcastProxy>
qmake: QT += knx
Since: Qt 5.12

This class was introduced in Qt 5.12.

Public Types

class Builder

Public Functions

QKnxNetIpRoutingSystemBroadcastProxy(const QKnxNetIpFrame &frame)
QKnxLinkLayerFrame cemi() const
bool isValid() const

Static Public Members

QKnxNetIpRoutingSystemBroadcastProxy::Builder builder()

Detailed Description

Routing system broadcast messages are useful in the situation when KNXnet/IP devices configured on different multicast addresses and secure KNXnet/IP devices configured on different backbone keys are not able to communicate between each other.

Note: When using QKnxNetIpRoutingSystemBroadcastProxy, care must be taken to ensure that the referenced KNXnet/IP frame outlives the proxy on all code paths, lest the proxy ends up referencing deleted data.

The following code sample illustrates how to introspect a routing system broadcast frame:

auto netIpFrame = QKnxNetIpFrame::fromBytes(...);

const QKnxNetIpRoutingSystemBroadcastProxy proxy(netIpFrame);
if (!proxy.isValid())
    return;

auto linkFrame = proxy.cemi();

See also builder(), QKnxNetIpRoutingSystemBroadcastProxy, and Qt KNXnet/IP Connection Classes.

Member Function Documentation

QKnxNetIpRoutingSystemBroadcastProxy::QKnxNetIpRoutingSystemBroadcastProxy(const QKnxNetIpFrame &frame)

Constructs a proxy object to read the routing system broadcast carried by the specified KNXnet/IP frame frame.

[static] QKnxNetIpRoutingSystemBroadcastProxy::Builder QKnxNetIpRoutingSystemBroadcastProxy::builder()

Returns a builder object to create a KNXnet/IP routing system broadcast frame.

QKnxLinkLayerFrame QKnxNetIpRoutingSystemBroadcastProxy::cemi() const

Returns a cEMI frame that contains the routing system broadcast message.

bool QKnxNetIpRoutingSystemBroadcastProxy::isValid() const

Returns true if the frame contains initialized values and is in itself valid, otherwise returns false. A valid KNXnet/IP frame consists of at least a valid header and a size in bytes corresponding to the total size of the KNXnet/IP frame header.

© 2024 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.