The QKnxNetIpConnectionStateRequestProxy::Builder class provides the means to create a KNXnet/IP connection state request frame. 更多...
| QKnxNetIpFrame | create () const |
| Builder & | setChannelId (quint8 channelId ) |
| Builder & | setControlEndpoint (const QKnxNetIpHpai & hpai ) |
A KNXnet/IP client sends a connection state request frame regularly to the KNXnet/IP server's control endpoint to check the state of a connection established to the server. The server responds immediately with a connection state response frame, QKnxNetIpConnectionStateResponseProxy .
In most programs, this class will not be used directly. Instead, the QKnxNetIpTunnel or QKnxNetIpDeviceManagement class is used to establish a functional connection to a KNXnet/IP server.
The common way to create a connection state request is:
auto hpai = QKnxNetIpHpaiProxy::builder().create(); auto netIpFrame = QKnxNetIpConnectionStateRequestProxy::builder() .setChannelId(255) .setControlEndpoint(hpai) .create();
If the KNXnet/IP client does not receive the connection state response within a timeout, or the status of the received response indicates that errors occurred, the client repeats the connection state request three times. It then terminates the connection by sending a disconnect request, QKnxNetIpDisconnectRequestProxy , to the server's control endpoint.
Creates and returns a KNXnet/IP connection state request frame.
注意： The returned frame may be invalid depending on the values used during setup.
另请参阅 isValid ().
Sets the ID of the communication channel to channelId and returns a reference to the builder.
Sets the control endpoint of the KNXnet/IP client to hpai and returns a reference to the builder.
