inet6_n2a
printf("\tinet6 %s\n", inet6_n2a(p));
addr = inet6_n2a(p);
static const char *inet6_n2a(void *);
printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest),
static const char *inet6_n2a(struct in6_addr *);