- memcpy(arp.arp_tpa, arp.arp_spa, sizeof arp.arp_tpa);
- memcpy(arp.arp_tha, arp.arp_sha, sizeof arp.arp_tha);
- memcpy(arp.arp_spa, &in->sin_addr.s_addr, sizeof in->sin_addr.s_addr);
+ memcpy(arp.arp_tpa, arp.arp_spa, sizeof(arp.arp_tpa));
+ memcpy(arp.arp_tha, arp.arp_sha, sizeof(arp.arp_tha));
+ memcpy(arp.arp_spa, &in->sin_addr.s_addr, sizeof(in->sin_addr.s_addr));