KEY_HASH
KEY_HASH(addr, vresp->rem_macaddr);
KEY_HASH(addr, vresp->rem_macaddr);
KEY_HASH(key, addrp->ether_addr_octet);
KEY_HASH(addr, &portp->p_macaddr);
KEY_HASH(addr, eaddr);
KEY_HASH(key, addrp);
KEY_HASH(addr, &(mcst_pkt->mca[i]));
KEY_HASH(key, &ehp->ether_dhost);