IRE_ADDR_HASH
hash = IRE_ADDR_HASH(dst, ipst->ips_dce_hashsize);
hash = IRE_ADDR_HASH(dst, ipst->ips_dce_hashsize);
(&((ipst)->ips_ndp4->nce_hash_tbl[IRE_ADDR_HASH(addr, NCE_TABLE_SIZE)]))
IRE_ADDR_HASH((addr).s6_addr32[3], table_size)