Re: [quicwg/base-drafts] Is it OK to send a server cleartext packet after the client has sent a finished message? (#829)

[Christian Huitema <[e-mail]>]

@kazuho You wrote:

> ACK for the cleartext packet that carried ClientFinished was sent in a cleartext packet that carried 
> ServerFinished.

That's not what I see in the logs. I see:

  -> Client initial (carries client hello)
  <- Server Clear Text (several message carry server flight, including server finished. Message embed 
       ACK of Client Initial
  -> Client clear text: carries client finished, and ACK of server clear text messages
  <- Server Clear Text: only carries an ACK Frame for the client clear text.

When the server sends the last server clear text message, it has already received the client clear text, since it acknowledges it. According to Ian's presentation of "ACK rules", ACKing a message means that the message was not just received but also processed -- which logically means processing the TLS state machine. I don't see what advantage there is to sending that last acknowledgement in clear text.

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