def addfield ( self , pkt , buf , val ) : self . set_endianess ( pkt ) return self . fld . addfield ( pkt , buf , val )
protobuf python add to zero length field
add the field with endianness to the buffer
def addfield(self, pkt, buf, val):
        """add the field with endianness to the buffer"""
        self.set_endianess(pkt)
        return self.fld.addfield(pkt, buf, val)