Re: [quicwg/base-drafts] Rework Key Update (#2237)

[Jana Iyengar <[e-mail]>]

janaiyengar commented on this pull request.



> @@ -5012,6 +5020,44 @@ Reason Phrase:
   This SHOULD be a UTF-8 encoded string {{!RFC3629}}.
 
 
+## KEYS_READY Frame {#frame-keys-ready}
+
+An endpoint sends a KEYS_READY frame (type=0x1e) to signal that it has installed
+keys for reading and writing packets.  Receipt of this frame in a packet
+indicates that all earlier keys can be safely discarded.

We should consider losses of handshake packets as not triggering congestion window reductions. This is perhaps a bit aggressive, but I would argue that we shouldn't have a lot of these packets anyways, and there are reasons beyond congestion that could cause these packets to be marked as lost.

I think we should go with the cleanest mechanism to drop keys -- this has been tricky to get right -- and we'll fix recovery around that. Once the other mechanisms are set, we can figure out how to best do recovery around them.

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