Subject: Re: [quicwg/base-drafts] Forbid zero-length connection ID with preferred addresses (#3565)
From: Martin Thomson <[email-masked]>
To: quicwg/base-drafts <[email-masked]>
Cc: Subscribed <[email-masked]>
Date: Wed, 08 Apr 2020 17:44:25 -0700
List-Id: Notification list for GitHub issues related to the QUIC WG <quic-issues.ietf.org>

@martinthomson commented on this pull request.

> @@ -4740,6 +4740,14 @@ preferred_address (0x0d):
   be at least one unused active connection ID when the client initiates
   migration to the preferred address.
 
+: The Connection ID and Stateless Reset Token fields of a preferred address are
+  identical in syntax and semantics to the corresponding fields of a
+  NEW_CONNECTION_ID frame ({{frame-new-connection-id}}).  A server that chooses
+  a zero-length connection ID MUST NOT provide a preferred address.  Similarly,

Thanks for taking this to the issue.

NEW_CONNECTION_ID can't [change to or from zero-length](https://quicwg.org/base-drafts/draft-ietf-quic-transport.html#section-19.15-6), so this is making this feature consistent with that.

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