QKnxNetIpTunnelingFeatureGetProxy Class
The QKnxNetIpTunnelingFeatureGetProxy class provides the means to access the information carried by a generic tunneling feature-get service QKnxNetIpFrame frame and to create a KNXnet/IP frame based on the information. More...
| Header: | #include <QKnxNetIpTunnelingFeatureGetProxy> |
| qmake: | QT += knx |
| Since: | Qt 5.12 |
This class was introduced in Qt 5.12.
Public Types
| class | Builder |
Public Functions
| QKnxNetIpTunnelingFeatureGetProxy(const QKnxNetIpFrame &frame) | |
| quint8 | channelId() const |
| QKnx::InterfaceFeature | featureIdentifier() const |
| bool | isValid() const |
| quint8 | sequenceNumber() const |
Static Public Members
| QKnxNetIpTunnelingFeatureGetProxy::Builder | builder() |
Detailed Description
A tunneling feature-get service frame contains the ID of the communication channel between a KNXnet/IP client and server, the sequence number of the frame, and the interface feature to read.
The tunneling client initiates the tunneling feature-get service to read the value of an interface feature from the tunneling server. Within 3 seconds after confirming the tunneling feature-get service the tunneling server sends a tunneling feature-response frame containing the value of the requested interface feature.
If the tunneling server does not respond to the tunneling feature-get service frame the tunneling client may or may not repeat the request.
Note: When using QKnxNetIpTunnelingFeatureGetProxy, 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 read the tunneling feature-get information sent by a KNXnet/IP client:
auto netIpFrame = QKnxNetIpFrame::fromBytes(...); const QKnxNetIpTunnelingFeatureGetProxy proxy(netIpFrame); if (!proxy.isValid()) return; auto id = proxy.featureIdentifier();
See also builder(), QKnxNetIpTunnelingFeatureInfoProxy, QKnxNetIpTunnelingFeatureResponseProxy, Qt KNX Tunneling Classes, and Qt KNXnet/IP Connection Classes.
Member Function Documentation
QKnxNetIpTunnelingFeatureGetProxy::QKnxNetIpTunnelingFeatureGetProxy(const QKnxNetIpFrame &frame)
Constructs a proxy object to read the tunneling feature-get service information carried by the specified KNXnet/IP frame frame.
[static] QKnxNetIpTunnelingFeatureGetProxy::Builder QKnxNetIpTunnelingFeatureGetProxy::builder()
Returns a builder object to create a KNXnet/IP tunneling feature-get service frame.
quint8 QKnxNetIpTunnelingFeatureGetProxy::channelId() const
Returns the ID of the communication channel between a KNXnet/IP client and server.
QKnx::InterfaceFeature QKnxNetIpTunnelingFeatureGetProxy::featureIdentifier() const
Returns the tunneling interface feature identifier of a tunneling feature-get service frame.
bool QKnxNetIpTunnelingFeatureGetProxy::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.
See also QKnxNetIpFrameHeader::totalSize().
quint8 QKnxNetIpTunnelingFeatureGetProxy::sequenceNumber() const
Returns the sequence number of a tunneling feature-get service frame.
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