Re: [quicwg/base-drafts] Client that does not PAD does not negotiate? (#4021)

Mike Bishop <> Thu, 20 August 2020 18:01 UTC

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Date: Thu, 20 Aug 2020 11:01:30 -0700
From: Mike Bishop <>
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Subject: Re: [quicwg/base-drafts] Client that does not PAD does not negotiate? (#4021)
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Not padding breaks the protocol, so there's a MUST in Section 14.  That MUST *does* apply to all versions that the client supports; the client obviously can't know the details of versions it doesn't support, including any the server supports, so that's all it can reference.  There's no minimum first-packet size in the invariants.

The server SHOULD send Version Negotiation in response to a packet of unknown version but an appropriate size; if it doesn't, the client won't know what versions it supports, but it might choose not to do so every time.  (Hence the "MAY limit" in the next sentence.)

Is the thing that's missing for you a linkage between "SHOULD send" and "MAY limit"?

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