-typedef enum {\r
- IP4_FRAME_RX_SIGNATURE = SIGNATURE_32 ('I', 'P', 'F', 'R'),\r
- IP4_FRAME_TX_SIGNATURE = SIGNATURE_32 ('I', 'P', 'F', 'T'),\r
- IP4_FRAME_ARP_SIGNATURE = SIGNATURE_32 ('I', 'P', 'F', 'A'),\r
- IP4_INTERFACE_SIGNATURE = SIGNATURE_32 ('I', 'P', 'I', 'F')\r
-} IP4_IF_ENUM_TYPES;\r
+#define IP4_FRAME_RX_SIGNATURE SIGNATURE_32 ('I', 'P', 'F', 'R')\r
+#define IP4_FRAME_TX_SIGNATURE SIGNATURE_32 ('I', 'P', 'F', 'T')\r
+#define IP4_FRAME_ARP_SIGNATURE SIGNATURE_32 ('I', 'P', 'F', 'A')\r
+#define IP4_INTERFACE_SIGNATURE SIGNATURE_32 ('I', 'P', 'I', 'F')\r