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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def send_and_receive(self, req):
 """Interface function to send and receive an IPMI message. target: IPMI target req: IPMI message request Returns the IPMI message response. """

        rx_data = self._send_and_receive(target=req.target,
                                         lun=req.lun,
                                         netfn=req.netfn,
                                         cmdid=req.cmdid,
                                         payload=encode_message(req))
        rsp = create_message(req.netfn + 1, req.cmdid, req.group_extension)
        decode_message(rsp, rx_data)
        return rsp