+/*
+ * Router type: cross-layer information from link-layer to
+ * IPv6 layer reported by certain link types (e.g., RFC4214).
+ */
+#define NDISC_NODETYPE_UNSPEC 0 /* unspecified (default) */
+#define NDISC_NODETYPE_HOST 1 /* host or unauthorized router */
+#define NDISC_NODETYPE_NODEFAULT 2 /* non-default router */
+#define NDISC_NODETYPE_DEFAULT 3 /* default router */
+