ExtendedBuilder Class

Class ExtendedBuilder is declared in class QKnxNetIpSearchRequestProxy.

The QKnxNetIpSearchRequestProxy::ExtendedBuilder class provides the means to create a KNXnet/IP extended search request. More...

This class was introduced in Qt 5.12.

Public Functions

ExtendedBuilder(const ExtendedBuilder &other)
ExtendedBuilder &operator=(const ExtendedBuilder &other)
QKnxNetIpFrame create() const
ExtendedBuilder &setDiscoveryEndpoint(const QKnxNetIpHpai &hpai)
ExtendedBuilder &setExtendedParameters(const QVector<QKnxNetIpSrp> &srps)

Detailed Description

To discover KNXnet/IP servers, a KNXnet/IP client sends a extended search request data packet via multicast using its discovery endpoint. The request contains the host address protocol information (HPAI) of the discovery endpoint. The HPAI may also contain a unicast IP address to receive the answers from the different servers directly in a point-to-point manner. Typically, it should contain the KNXnet/IP system setup multicast address to ensure reception from KNXnet/IP servers that are on a different subnetwork. Additionally, the client may include 0 or more search request parameter blocks.

The common way to create a search request is:

auto hpai = ... // create HPAI;
auto macAddress = ... // fetch and set the MAC address;

auto macSrp = QKnxNetIpSrpProxy::macAddressBuilder()
auto modeSrp = QKnxNetIpSrpProxy::programmingModeBuilder()

auto netIpFrame = QKnxNetIpSearchRequestProxy::extendedBuilder()
    .setExtendedParameter({ macSrp, modeSrp })

After sending the search request, the KNXnet/IP client waits until timeout for the response frame from the KNXnet/IP server, QKnxNetIpSearchResponseProxy. After the timeout, received response frames are ignored by the client until it sends another search request. Search requests received from other clients are always ignored.

See also QKnxNetIpHpaiProxy::Builder.

Member Function Documentation

ExtendedBuilder::ExtendedBuilder(const ExtendedBuilder &other)

Constructs a copy of other.


Creates an extended search request builder.

ExtendedBuilder &ExtendedBuilder::operator=(const ExtendedBuilder &other)

Assigns other to this builder.


Destroys an extended search request builder.

QKnxNetIpFrame ExtendedBuilder::create() const

Creates and returns a KNXnet/IP extended search request frame.

Note: The returned frame may be invalid depending on the values used during setup.

See also isValid().

ExtendedBuilder &ExtendedBuilder::setDiscoveryEndpoint(const QKnxNetIpHpai &hpai)

Sets the discovery endpoint of the KNXnet/IP client to hpai and returns a reference to the builder.

ExtendedBuilder &ExtendedBuilder::setExtendedParameters(const QVector<QKnxNetIpSrp> &srps)

Adds the QVector of extended parameters srps to the KNXnet/IP extended search request.

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