opbuf = (OperationBuffer *) op;
memset( opbuf, 0, sizeof(*opbuf) );
op->o_hdr = &opbuf->ob_hdr;
op->o_controls = opbuf->ob_controls;
if ( ctx ) {
opbuf = (OperationBuffer *) op;
memset( opbuf, 0, sizeof(*opbuf) );
op->o_hdr = &opbuf->ob_hdr;
op->o_controls = opbuf->ob_controls;
if ( ctx ) {