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# frozen_string_literal: true
# @summary Converts an octet netmask address of the form 255.255.255.0 into its CIDR variant.
# Thus making it directly usable with the values from facter.
#
Puppet::Functions.create_function(:'extlib::netmask_to_cidr') do
# @param netmask IPv6 or IPv4 netmask in octet notation
# @return CIDR / prefix length
# @example calling the function
# extlib::netmask_to_cidr('255.0.0.0')
dispatch :netmask_to_cidr do
param 'Stdlib::IP::Address::Nosubnet', :netmask
return_type 'Integer[0, 128]'
end
def netmask_to_cidr(netmask)
dummy_addr = IPAddr.new(netmask).ipv6? ? '::' : '0.0.0.0'
IPAddr.new("#{dummy_addr}/#{netmask}").prefix
end
end
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