For most types of plug-in functions, the server passes in a parameter block (Slapi_PBlock) including data relevant to the operation being processed. Access the data using slapi_pblock_get().
Plug-in initialization functions register at least the plug-in API version, plug-in descriptions, and other plug-in functions using slapi_pblock_set() .
The specific parameters available in a Slapi_PBlock structure depend on the type of plug-in function and the context of the LDAP operation. Refer to the “Parameter Block Reference,” on page 335 for details on the name-value pairs available to specific types of plug-in functions.