EVT_BACNET_READPROPERTYMULT (STRUCT)¶

TYPE EVT_BACNET_READPROPERTYMULT : STRUCT

The ReadPropertyMultiple service hook

This is the type declaration for the Read Property Multiple service application hook. This hook allows a BACnet application override the default BACnet processing of a Read Property Multiple service request. This hook is given all of the parameters of a service request, and is responsible for all error checking (Device/Object/ Property existence, array index correctness and so forth). A pointer to the routine is registered with the BACnet server by BACnetSetHook API routine. A hook can be registered by the registering API routine at any time. One hook procedure is registered per service. If a hook is registered more than once for the same service, the new hook procedure replaces old one. A 0 procedure pointer can be used to deregister the hook. A Read Property Multiple hook must complete its service request processing by using one of the transaction completion API routines: BACnetSrvcAbortCbCompletion, BACnetSrvcErrorCbCompletion, BACnetSrvcIgnoreCbCompletion, or BACnetSrvcRejectCbCompletion. Hooks can access the local Properties maintained in the API database by using the BACnetStorePropertyInstance / BACnetRetrievePropertyInstance routines. A hook can choose not to override the default API processing of a service request by returning the value CB_STATUS_DEFAULT.

InOut:

Name	Type	Comment
`pCBStatus`	POINTER TO IEC_BACNET_CB_STATUS	CB-Status returned for the event. “Default” processes the standard APIs reaction, which needs no additional Callback-Signalling.
`phTransaction`	POINTER TO BYTE	This is the Transaction State Machine (TSM) handle for the current service request. It is generated by the BACnet API and is the first parameter given to the Hook- Completion functions.
`sourceAddress`	POINTER TO IEC_BACNET_ADDRESS	This is the MAC address of the BACnet addressed device from which the request has been sent.
`destinationAddress`	POINTER TO IEC_BACNET_ADDRESS	This is the MAC address of the device constructed by the application which has received the request.
`pServiceInfo`	POINTER TO IEC_BACNET_READ_MUL_INFO	A pointer to the service information data structure.