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module Puppet::Parser::Functions
newfunction(:validate_ipv4_address, :doc => <<-ENDHEREDOC
Validate that all values passed are valid IPv4 addresses.
Fail compilation if any value fails this check.
The following values will pass:
$my_ip = "1.2.3.4"
validate_ipv4_address($my_ip)
validate_ipv4_address("8.8.8.8", "172.16.0.1", $my_ip)
The following values will fail, causing compilation to abort:
$some_array = [ 1, true, false, "garbage string", "3ffe:505:2" ]
validate_ipv4_address($some_array)
ENDHEREDOC
) do |args|
require "ipaddr"
rescuable_exceptions = [ ArgumentError ]
if defined?(IPAddr::InvalidAddressError)
rescuable_exceptions << IPAddr::InvalidAddressError
end
unless args.length > 0 then
raise Puppet::ParseError, ("validate_ipv4_address(): wrong number of arguments (#{args.length}; must be > 0)")
end
args.each do |arg|
unless arg.is_a?(String)
raise Puppet::ParseError, "#{arg.inspect} is not a string."
end
begin
unless IPAddr.new(arg).ipv4?
raise Puppet::ParseError, "#{arg.inspect} is not a valid IPv4 address."
end
rescue *rescuable_exceptions
raise Puppet::ParseError, "#{arg.inspect} is not a valid IPv4 address."
end
end
end
end
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