question: public void sendDCCppMessage ( DCCppMessage m , DCCppListener reply ) { log . debug ( "queue DCCpp packet: " + m . toString ( ) ) ; try { synchronized ( xmtHandler ) { xmtList . addLast ( m ) ; xmtHandler . notify ( ) ; } } catch ( Exception e ) { log . warn ( "passing to xmit: unexpected exception: " + e ) ; } }
target:  Forward a preformatted DCCppMessage to the actual interface. Checksum is computed and overwritten here, then the message is converted to a byte array and queue for transmission