dni_physaddrlen
assert(dnip->dni_physaddrlen <= DLPI_PHYSADDR_MAX);
if (pi->pi_hwaddrlen == dnip->dni_physaddrlen &&
pi->pi_hwaddrlen = dnip->dni_physaddrlen;
notifinfo.dni_physaddrlen = datalen - dip->dli_saplen;
if (notifinfo.dni_physaddrlen > DLPI_PHYSADDR_MAX)
notifinfo.dni_physaddrlen);