On Tuesday 19 August 2008 13:34:04 David H. Lynch Jr. wrote:
> + switch (ip->protocol) {
> + case IPPROTO_TCP:
> + start = sizeof(struct iphdr) + ETH_HLEN;
> + insert = sizeof(struct iphdr) + ETH_HLEN + 16;
> + length = ip->tot_len - sizeof(struct iphdr);
> + headlen = ETH_HLEN
> + + sizeof(struct iphdr)
> + + sizeof(struct tcphdr);
> + break;
> + case IPPROTO_UDP:
> + start = sizeof(struct iphdr) + ETH_HLEN;
> + insert = sizeof(struct iphdr) + ETH_HLEN + 6;
> + length = ip->tot_len - sizeof(struct iphdr);
> + headlen = ETH_HLEN
> + + sizeof(struct iphdr)
> + + sizeof(struct udphdr);
> + break;
> + default:
> + break;
> + }
Why all these calculations instead of skb_transport_offset(skb) and
skb->csum_offset usage?
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