-#define HBH_OPTION_TYPE_SKIP_UNKNOWN (0x0 << 6)
-#define HBH_OPTION_TYPE_DISCARD_UNKNOWN (0x1 << 6)
-#define HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP (0x2 << 6)
-#define HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST (0x3 << 6)
+#define HBH_OPTION_TYPE_SKIP_UNKNOWN (0x00)
+#define HBH_OPTION_TYPE_DISCARD_UNKNOWN (0x40)
+#define HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP (0x80)
+#define HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST (0xc0)
+#define HBH_OPTION_TYPE_HIGH_ORDER_BITS (0xc0)