Re: [quicwg/base-drafts] Simplify the client's PTO code by allowing the server to send a PING (#3161)

Christian Huitema <> Tue, 29 October 2019 21:28 UTC

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From: Christian Huitema <>
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Subject: Re: [quicwg/base-drafts] Simplify the client's PTO code by allowing the server to send a PING (#3161)
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I agree that having the server repeat a PING on timer may also work, and that the ACK of the randomly chosen Server's CID would make a reasonable address ownership test. ACK of the PING would naturally unlock any transmission that is pending address ownership.

Kazuho objects that this his hackable if the chosen Server's CID is guessable. We don't have a "non-guessable" requirement in the spec. In that case, the natural fix is the challenge/response mechanism.

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