Re: [quicwg/base-drafts] Request to Retire Locally Issued CIDs (#2769)

[Nick Banks <[e-mail]>]

nibanks commented on this pull request.



> @@ -5018,10 +5034,16 @@ sequence number, or if a sequence number is used for different connection
 IDs, the endpoint MAY treat that receipt as a connection error of type
 PROTOCOL_VIOLATION.
 
+If the Retire Prior To field is present it is a request for the peer to
+immediately retire all connection IDs with a sequence number less than the
+specified value.  For more information see {{retiring-cids}}.  This field
+should only ever increase, though reordering and retransmission of older packets
+may make it seem to decrease.  So any decrease in this field should be ignored.
+

We have the same problem with flow control values. We allow for implementations to naively retransmit packets that were lost, as is, so it's possible you have already updated the prior to field in a more recent packet, but then retransmit an older packet.

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