- if (tcp_v4_check(skb->h.th, skb->len, skb->nh.iph->saddr,
- skb->nh.iph->daddr,
- skb_checksum(skb, 0, skb->len, 0)))
- return -1;
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- } else {
- skb->csum = ~tcp_v4_check(skb->h.th, skb->len,
- skb->nh.iph->saddr,
- skb->nh.iph->daddr, 0);