ip6_unknown_opt 95 netinet6/dest6.c optlen = ip6_unknown_opt(opt, m, ip6_unknown_opt 953 netinet6/ip6_input.c optlen = ip6_unknown_opt(opt, m, ip6_unknown_opt 277 netinet6/ip6_var.h int ip6_unknown_opt(u_int8_t *, struct mbuf *, int);