inet6_n2a
printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr));
printf("\t\tgroup %s", inet6_n2a(&multi.in6m_addr));
const char *inet6_n2a(struct in6_addr *);
printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest),
static const char *inet6_n2a(struct in6_addr *);