-typedef enum {\r
- UDP_IO_RX_SIGNATURE = SIGNATURE_32 ('U', 'D', 'P', 'R'),\r
- UDP_IO_TX_SIGNATURE = SIGNATURE_32 ('U', 'D', 'P', 'T'),\r
- UDP_IO_SIGNATURE = SIGNATURE_32 ('U', 'D', 'P', 'I')\r
-} UDP_IO_SIGNATURE_TYPE;\r
+\r
+#define UDP_IO_RX_SIGNATURE SIGNATURE_32 ('U', 'D', 'P', 'R')\r
+#define UDP_IO_TX_SIGNATURE SIGNATURE_32 ('U', 'D', 'P', 'T')\r
+#define UDP_IO_SIGNATURE SIGNATURE_32 ('U', 'D', 'P', 'I')\r
+\r
+#define UDP_IO_UDP4_VERSION 4\r
+#define UDP_IO_UDP6_VERSION 6\r