if (arp->ar_op == htons(ARPOP_REQUEST) &&
memcmp(&arp->ar_spa, &null_ip, ARP_PLEN) == 0 &&
memcmp(&arp->ar_tpa, &ip, ARP_PLEN) == 0 &&
if (arp->ar_op == htons(ARPOP_REQUEST) &&
memcmp(&arp->ar_spa, &null_ip, ARP_PLEN) == 0 &&
memcmp(&arp->ar_tpa, &ip, ARP_PLEN) == 0 &&