Re: [quicwg/base-drafts] Handling of corrupt Retry packets (#3014)

Martin Thomson <> Wed, 11 September 2019 02:50 UTC

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From: Martin Thomson <>
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Subject: Re: [quicwg/base-drafts] Handling of corrupt Retry packets (#3014)
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Presumably devices that rewrite addresses and checksums also check checksums on the way in...  Right?  :)

This seems like a fine design issue.  It's a fairly big change, for Retry, and late, but not impossible.  Version Negotiation is much, much more difficult to retrofit, so I think that we should concentrate on Retry here and open a VN issue if anyone feels strongly about that.

Using Initial packet protection isn't crazy.  We'd be able to drop ODCID if we did that.

Saying that we don't care is also rational.  The UDP checksum is imperfect (especially when it comes to catching bit flips), but we are talking about having maybe a few connections per day time out, globally.  I didn't do the numbers on that, but my recollection is that the odds are that small.

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