EUI64_GBIT
in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 &&
#define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT)