+ self.update_from_arp_scan()
+ self.update_from_arp()
+ if len(self.state) < config.config['arper_min_entries_to_be_valid']:
+ raise Exception(
+ f'Arper didn\'t find enough entries; only got {len(self.state)}.'
+ )
+
+ def update_from_arp_scan(self):
+ network_spec = site_config.get_config().network
+ try:
+ output = exec_utils.cmd(
+ f'/usr/local/bin/arp-scan --retry=6 --timeout 350 --backoff=1.4 --random --numeric --plain --ignoredups {network_spec}',
+ timeout_seconds=10.0,
+ )
+ except Exception as e:
+ logger.exception(e)
+ return
+ for line in output.split('\n'):
+ ip = string_utils.extract_ip_v4(line)
+ mac = string_utils.extract_mac_address(line)
+ if (
+ ip is not None
+ and mac is not None
+ and mac != 'UNKNOWN'
+ and ip != 'UNKNOWN'
+ ):
+ mac = mac.lower()
+ logger.debug(f'ARPER: {mac} => {ip}')
+ self.state[mac] = ip