--- /dev/null
+#
+# Copyright (C) 2013 eNovance SAS <licensing@enovance.com>
+#
+# Author: Emilien Macchi <emilien.macchi@enovance.com>
+# Martin Magr <mmagr@redhat.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+# Advanced validation for VXLAN UDP port configuration
+#
+
+module Puppet::Parser::Functions
+ newfunction(:validate_vxlan_udp_port) do |args|
+ value = Integer(args[0])
+
+ # check if port is either default value or one of the private ports
+ # according to http://tools.ietf.org/html/rfc6056
+ if value != 4789 or (49151 >= value and value > 65535)
+ raise Puppet::Error, "vxlan udp port is invalid."
+ end
+ end
+end