IPADDRL
ifrarplen = sizeof (struct arphdr) + (2 * IPADDRL) + (2 * physaddrlen);
req->ar_pln = IPADDRL;
(void) memcpy((uchar_t *)req + sizeof (struct arphdr) + IPADDRL +
sizeof (struct arphdr) + (2 * physaddrlen) + IPADDRL,
else if (ans->ar_pln != IPADDRL)