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Re: [quicwg/base-drafts] Handling of duplicate packets (#1405)

Martin Thomson <notifications@github.com> Fri, 01 June 2018 01:29 UTC

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Subject: Re: [quicwg/base-drafts] Handling of duplicate packets (#1405)
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The problem with processing ECN before decryption is that you get double-counting if packets are duplicated.  And that happens.  The ECN PR specifically says that you need to detect and discard duplicates to avoid this.

Also, the ECN feedback is based on counting of packets sent vs. those that are acknowledged, so counting ECN-marked chaff would inflate and likely distort the signal.

There is probably a way in which processing ECN signals before decryption could improve signal, but I think that's a different design to what has been proposed.

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