NR_MAX_PACKET_SIZE
dev->mtu = NR_MAX_PACKET_SIZE;
if (skb->len - NR_TRANSPORT_LEN > NR_MAX_PACKET_SIZE) {
if ((skbn = sock_alloc_send_skb(sk, frontlen + NR_MAX_PACKET_SIZE, 0, &err)) == NULL) {
len = (NR_MAX_PACKET_SIZE > skb->len) ? skb->len : NR_MAX_PACKET_SIZE;