[Cake] Hopefully fixed ACK filter for v6

[Sebastian Moeller]

Hi Toke, 

I certainly am thankful for your work, and believe you deserve $CAKE and $BEVERAGE, I am also leaf to believe 'the cake is a lie' https://m.youtube.com/watch?v=qdrs3gr_GAs ;)



Mange Tak

Sebastian

On April 29, 2018 12:45:26 PM GMT+02:00, "Toke Høiland-Jørgensen" <toke at toke.dk> wrote:
>
>
>On 29 April 2018 03:01:55 CEST, Ryan Mounce <ryan at mounce.com.au> wrote:
>>On 29 April 2018 at 07:19, Toke Høiland-Jørgensen <toke at toke.dk>
>wrote:
>>> Think I finally managed to fix the ACK filter so it works for both
>>6in4
>>> and regular v6 (the latter seems to have been broken since the
>commit
>>> "e6b72c2 ack_filter: make less aggressive by default" which
>>accidentally
>>> reversed the address compare logic). It should also be safe against
>>> weirdly fragmented packets (ha! famous last words!).
>>>
>>> If someone wants to either eyeball the code and/or test the ACK
>>filter
>>> please do. I'm planning to resubmit the patch to netdev sometime
>>> tomorrow evening :)
>>
>>Eyeballing now, only a couple of comments.
>>
>>- Initialisation of iph and ipv6h can be moved before the while()
>>loop. The compiler probably does this anyway.
>
>Yeah, figured I'd let the compiler deal with that...
>
>>- Whether it is worth the complexity of restoring the
>>skb->encapsulation check within cake_get_tcphdr to handle other cases
>>of encapsulated v4/v6 traffic. I may find some time to test this later
>>today.
>
>The reason I removed the check for skb->encapsulation was that in my
>tests it wasn't actually set for 6in4 traffic.
>
>And looking at the code that touches it, that field seems to mostly be
>related to offloads? Or did you actually see any effect of using it
>when you added it initially? :P
>
>>Everything else looks good to me, much cleaner.
>
>Awesome, thanks for taking a look!
>
>>Thank you so much for your efforts so far in getting cake upstream,
>>and in particular to rescue ACK filtering. We may have to send you a
>>real cake!
>
>Haha, you're very welcome. Real cake will be appreciated, but don't
>feel any obligations ;)
>
>-Toke
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-- 
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