def _add_flow_v1_0(self, src, port, timeout, datapath):
        """enter a flow entry for the packet from the slave i/f
        with idle_timeout. for OpenFlow ver1.0."""
        ofproto = datapath.ofproto
        parser = datapath.ofproto_parser

        match = parser.OFPMatch(
            in_port=port, dl_src=addrconv.mac.text_to_bin(src),
            dl_type=ether.ETH_TYPE_SLOW)
        actions = [parser.OFPActionOutput(
            ofproto.OFPP_CONTROLLER, 65535)]
        mod = parser.OFPFlowMod(
            datapath=datapath, match=match, cookie=0,
            command=ofproto.OFPFC_ADD, idle_timeout=timeout,
            priority=65535, flags=ofproto.OFPFF_SEND_FLOW_REM,
            actions=actions)
        datapath.send_msg(mod)