[Cake] Fwd: [Codel] fq_codel_drop vs a udp flood

[moeller0]

Hi Jonathan,

> On May 6, 2016, at 06:44 , Jonathan Morton <chromatix99 at gmail.com> wrote:
> 
> 
>> On 6 May, 2016, at 07:35, Dave Taht <dave.taht at gmail.com> wrote:
>> 
>> this would be a pretty nifty feature for cake to have in this hostile universe.
> 
> Yes, but difficult to implement since the trailing fragments lose the proto/port information, and thus get sorted into a different queue than the leading fragment.  We would essentially need to implement the same tracking mechanisms as for actual reassembly.

	But the receiver needs to be able to re-segment the fragments so all required information needs to be there; what about looking at src and dst address and the MF flag in the header as well as the fragment offset and scrape proto/port from the leading fragment and “virtually” apply it to all following fragments, that way cake will do the right thing. All of this might be too costly in implementation and computation to be feasible…

Best Regards
	Sebastian

> 
> - Jonathan Morton
> 
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