Re: [quicwg/base-drafts] Equivalence of preferred_address and NEW_CONNECTION_ID (#3560)

Martin Thomson <> Wed, 01 April 2020 05:29 UTC

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From: Martin Thomson <>
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Subject: Re: [quicwg/base-drafts] Equivalence of preferred_address and NEW_CONNECTION_ID (#3560)
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That's an excellent point, and a good reason not to allow changing to zero-length connection IDs in combination with preferred_address.  The nasty part of that is that in most cases that design would work because clients won't use the "new" connection ID until after the handshake is complete.  Of course, it would fail spectacularly if a client did decide to switch earlier - and the client might attract the blame, where it is clearly the fault of the server.

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