def ipv4_from_macaddr(macaddr):
"""
Given @macaddr, returns the @ipv4 or None if unknown / lookup failed, etc.
"""
if not is_mac_address_valid(macaddr):
return None
macaddr = normalize_mac_address(macaddr).lower()
by_macaddr = load(DHCPD_LEASES_FILENAME)[1]
if macaddr not in by_macaddr:
return None
else:
return by_macaddr[macaddr].ipv4
def set_hardware_ethernet(self, s):
"""
Called when a 'hardware ethernet' statement is read from the leases file.
"""
self.macaddr = normalize_mac_address(s).lower() # pylint: disable-msg=W0201
