Re: [quicwg/base-drafts] Connection ID Length changes (#2473)

martinduke <> Sat, 16 February 2019 18:09 UTC

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From: martinduke <>
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Subject: Re: [quicwg/base-drafts] Connection ID Length changes (#2473)
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Either I have been very unclear, or I am proposing something that makes a simple error so that it is confusing everybody. Here is what I am proposing to allow (CIDs are letters)

Client                                                                                                    Server
[ Connection already setup; client has no CID ]
IP: to (DCID A) ----->
           (contains NEW_CONN_ID B)
                                                                              <--- IP: to (no DCID)
                                                                                       (contains NEW_CONN_ID C)
(exchange continues with IP addresses above, with no CID to client and CID A to server)
(then there's an address change)
IP: to (DCID C) -------->
                                                                               <---- IP: to (DCID B)

This is the case I am concerned about. I do not see, at the moment, any reason why switching "client" and "server" above should make a difference.

What I am definitely NOT proposing is that an endpoint migrate while never accepting a non-ZL CID.

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