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())

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.

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