+typedef u_int mark_t;
+
+#define NETBUF_T netbuf_t
+#define NB_ALLOC ppp_nb_alloc
+#define NB_FREE nb_free
+#define NB_MAP nb_map
+#define NB_SIZE nb_size
+#define NB_SHRINK_TOP ppp_nb_shrink_top
+#define NB_GROW_TOP ppp_nb_grow_top
+#define NB_SHRINK_BOT nb_shrink_bot
+#define NB_GROW_BOT nb_grow_bot
+#define NB_READ nb_read
+#define NB_WRITE nb_write
+#define NB_GET_MARK nb_get_mark
+#define NB_SET_MARK nb_set_mark
+#define NB_GET_NEXT nb_get_next
+#define NB_SET_NEXT nb_set_next
+#define nb_TO_NB(nb) (nb)
+#define NB_TO_nb(NB) (NB)
+