extern int nextproto6_cksum(netdissect_options *, const struct ip6_hdr *, const uint8_t *, u_int, u_int, u_int);
/* Utilities */
+extern void nd_print_trunc(netdissect_options *);
+
extern int mask2plen(uint32_t);
extern int mask62plen(const u_char *);