Subject: Re: [quicwg/base-drafts] Explain extraordinary conditions that lead to sending a Handshake packet (#2598)

From: Benjamin Saunders <[email-masked]>
Date: Mon, 23 Sep 2019 19:50:39 -0700

I think the logic in the recovery draft misses some of these cases entirely. The rule in draft 23 is:
>  the client MUST set the probe timer if the client has not received an acknowledgement for one of its Handshake or 1-RTT packets.

but in your example case there is not necessarily any unacknowledged data to transmit in a probe, and a `PING` is forbidden at Handshake level, leaving no reasonable options to compose an ACK-eliciting packet.

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