+ socket.recv_len method return first N bytes from message + message.set_size resize zmq_msg_t object (create/copy) + message.pointer return pointer to zmq_msg_data as lightuserdata
+ socket.recv_len method return first N bytes from message + message.set_size resize zmq_msg_t object (create/copy) + message.pointer return pointer to zmq_msg_data as lightuserdata