@Throttle(MIN_TIME_BETWEEN_SCANS)
    def _update_info(self):
        if not self.success_init:
            return False

        with self.lock:
            _LOGGER.info("Checking ARP")

            url = 'http://{}/cgi-bin/luci/rpc/sys'.format(self.host)
            result = _req_json_rpc(url, 'net.arptable',
                                   params={'auth': self.token})
            if result:
                self.last_results = []
                for device_entry in result:
                    # Check if the Flags for each device contain
                    # NUD_REACHABLE and if so, add it to last_results
                    if int(device_entry['Flags'], 16) & 0x2:
                        self.last_results.append(device_entry['HW address'])

                return True

            return False
Return a sample hosts file, with keys for www.twistedmatrix.com and
dataset/ETHPy150Open home-assistant/home-assistant/homeassistant/components/device_tracker/luci.py/LuciDeviceScanner._update_info--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/conch/test/test_knownhosts.py/KnownHostsDatabaseTests.loadSampleHostsFile