dev=interface, ip=addr, h=node['host']))
-def convert_ipv4_netmask_prefix(netmask):
+def convert_ipv4_netmask_prefix(network):
"""Convert network mask to equivalent network prefix length or vice versa.
Example: mask 255.255.0.0 -> prefix length 16
- :param netmask: network mask or network prefix length.
- :type netmask: str or int
- :return: network mask or network prefix length.
+ :param network: Network mask or network prefix length.
+ :type network: str or int
+ :return: Network mask or network prefix length.
:rtype: str or int
"""
temp_address = "0.0.0.0"
- net = IPv4Network(u"{0}/{1}".format(temp_address, netmask), False)
+ net = IPv4Network(u"{0}/{1}".format(temp_address, network), False)
- if isinstance(netmask, int):
+ if isinstance(network, int) and (0 < network < 33):
return net.netmask
- elif isinstance(netmask, basestring):
+ elif isinstance(network, basestring):
return net.prefixlen
+ else:
+ raise Exception("Value {0} is not a valid ipv4 netmask or network"
+ " prefix length".format(network))