--- /dev/null
+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_bool("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