dlphysaddrack
dlphysaddrack(q, mp, NULL, 0);
dlphysaddrack(q, mp, addr, (t_uscalar_t)addr_length);
dlphysaddrack(wq, mp, &addr, ETHERADDRL);
dlphysaddrack(q, mp, (caddr_t)addr, macinfo->gldm_addrlen);
dlphysaddrack(q, mp, (char *)&addr, ETHERADDRL);
extern void dlphysaddrack(queue_t *, mblk_t *, const void *, t_uscalar_t);