Re: [quicwg/base-drafts] ACK of non-existent packet is illegal (#2302)

janaiyengar <> Tue, 08 January 2019 23:59 UTC

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Date: Tue, 08 Jan 2019 23:59:47 +0000
From: janaiyengar <>
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Subject: Re: [quicwg/base-drafts] ACK of non-existent packet is illegal (#2302)
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janaiyengar commented on this pull request.

>  acknowledgment of its ACK frames, with the knowledge this could cause the sender
 to unnecessarily retransmit some data.  Standard QUIC {{QUIC-RECOVERY}}
 algorithms declare packets lost after sufficiently newer packets are
 acknowledged.  Therefore, the receiver SHOULD repeatedly acknowledge newly
 received packets in preference to packets received in the past.
+An endpoint SHOULD treat receipt of an acknowledgment for a packet it did not
+send as a connection error of type PROTOCOL_VIOLATION, if it is able to detect

Let's do a separate discussion about error codes. I don't think it's necessary here, and if this is an important new error code, let's introduce that in a new issue/PR.

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