-#define FT_CONTENT_FILTER 0
-#define FT_CLIENT_HEADER_FILTER 1
-#define FT_SERVER_HEADER_FILTER 2
-#define FT_CLIENT_HEADER_TAGGER 3
-#define FT_SERVER_HEADER_TAGGER 4
-
+enum filter_type
+{
+ FT_CONTENT_FILTER = 0,
+ FT_CLIENT_HEADER_FILTER = 1,
+ FT_SERVER_HEADER_FILTER = 2,
+ FT_CLIENT_HEADER_TAGGER = 3,
+ FT_SERVER_HEADER_TAGGER = 4,
+};