Function CS104_Connection_setRawMessageHandler 

pub unsafe extern "C" fn CS104_Connection_setRawMessageHandler(
    self_: CS104_Connection,
    handler: IEC60870_RawMessageHandler,
    parameter: *mut c_void,
)

Set the raw message callback (called when a message is sent or received)

Arguments

• handler - user provided callback handler function
• parameter - user provided parameter that is passed to the callback handler