+//\r
+// Address families.\r
+//\r
+#define AF_INET 2 /* internetwork: UDP, TCP, etc. */\r
+#define AF_INET6 24 /* IP version 6 */\r
+\r
+//\r
+// Define constants based on RFC0883, RFC1034, RFC 1035\r
+//\r
+#define NS_INT16SZ 2 /*%< #/bytes of data in a u_int16_t */\r
+#define NS_INADDRSZ 4 /*%< IPv4 T_A */\r
+#define NS_IN6ADDRSZ 16 /*%< IPv6 T_AAAA */\r
+\r