On Tue, 2020-04-21 at 17:20 +0200, Johannes Berg wrote:
> Hi,
>
> This is probably a stupid question but I'm hitting my head against the
> wall ...
>
> I have an skb. I have this:
>
>
> if (skb->ip_summed == CHECKSUM_COMPLETE) {
> printk(KERN_DEBUG "csum before\n");
> printk(KERN_DEBUG " hw = 0x%.4x\n", skb->csum);
> printk(KERN_DEBUG " sw = 0x%.4x\n", csum_fold(skb_checksum(skb, 0, skb->len, 0)));
Never mind. The csum_fold() there is obviously the problem - that
shouldn't match, it should match the folded skb->csum. I have a missing
~ basically.
johannes
