Function CS101_ASDU_getPayloadSize 

pub unsafe extern "C" fn CS101_ASDU_getPayloadSize(
    self_: CS101_ASDU,
) -> c_int

Get the ASDU payload buffer size

The payload is the ASDU message part after the ASDU header (type ID, VSQ, COT, CASDU)

Returns

the ASDU payload buffer size