diff --git a/c_gen/templates/loci_class_metadata.h b/c_gen/templates/loci_class_metadata.h
new file mode 100644
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+++ b/c_gen/templates/loci_class_metadata.h
@@ -0,0 +1,63 @@
+:: # Copyright 2014, Big Switch Networks, Inc.
+:: #
+:: # LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with
+:: # the following special exception:
+:: #
+:: # LOXI Exception
+:: #
+:: # As a special exception to the terms of the EPL, you may distribute libraries
+:: # generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided
+:: # that copyright and licensing notices generated by LoxiGen are not altered or removed
+:: # from the LoxiGen Libraries and the notice provided below is (i) included in
+:: # the LoxiGen Libraries, if distributed in source code form and (ii) included in any
+:: # documentation for the LoxiGen Libraries, if distributed in binary form.
+:: #
+:: # Notice: "Copyright 2014, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler."
+:: #
+:: # You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain
+:: # a copy of the EPL at:
+:: #
+:: # http://www.eclipse.org/legal/epl-v10.html
+:: #
+:: # 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
+:: # EPL for the specific language governing permissions and limitations
+:: # under the EPL.
+::
+:: include('_copyright.c')
+::
+#ifndef __LOCI_CLASS_METADATA_H__
+#define __LOCI_CLASS_METADATA_H__
+
+typedef void (*of_wire_length_get_f)(of_object_t *obj, int *bytes);
+typedef void (*of_wire_length_set_f)(of_object_t *obj, int bytes);
+typedef void (*of_wire_type_get_f)(of_object_t *obj, of_object_id_t *id);
+typedef void (*of_wire_type_set_f)(of_object_t *obj);
+
+struct loci_class_metadata {
+    of_wire_length_get_f wire_length_get;
+    of_wire_length_set_f wire_length_set;
+    of_wire_type_get_f wire_type_get;
+    of_wire_type_set_f wire_type_set;
+};
+
+extern struct loci_class_metadata loci_class_metadata[OF_OBJECT_COUNT];
+
+static inline void
+of_object_wire_length_set(of_object_t *obj, int bytes)
+{
+    if (loci_class_metadata[obj->object_id].wire_length_set) {
+        loci_class_metadata[obj->object_id].wire_length_set(obj, bytes);
+    }
+}
+
+static inline void
+of_object_wire_type_set(of_object_t *obj)
+{
+    if (loci_class_metadata[obj->object_id].wire_type_set) {
+        loci_class_metadata[obj->object_id].wire_type_set(obj);
+    }
+}
+
+#endif