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# Custom function to transform netmask from IP notation to
# CIDR format. Input is an IP address, output a CIDR:
# 255.255.255.0 = 24
# The CIDR formated netmask is needed for some
# Contrail configuration files
require 'ipaddr'
module Puppet::Parser::Functions
newfunction(:netmask_to_cidr, :type => :rvalue) do |args|
if args[0].class != String
raise Puppet::ParseError, "Syntax error: #{args[0]} must be a String"
end
IPAddr.new(args[0]).to_i.to_s(2).count("1")
end
end
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