1 files changed, 41 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/validate_ipv4_address.rb b/lib/puppet/parser/functions/validate_ipv4_address.rb
new file mode 100644
index 0000000..2de1454
--- /dev/null
+++ b/lib/puppet/parser/functions/validate_ipv4_address.rb
@@ -0,0 +1,41 @@
+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|
+
+    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 ArgumentError
+        raise Puppet::ParseError, "#{arg.inspect} is not a valid IPv4 address."
+      end
+    end
+
+  end
+
+end