Re: [quicwg/base-drafts] Authenticate connection IDs (#3499)

[Martin Thomson <[e-mail]>]

@martinthomson commented on this pull request.



> +treat any of the following as a connection error of type PROTOCOL_VIOLATION:
+
+* absence of the initial_connection_id transport parameter from either
+  endpoint,
+
+* absence of the original_connection_id transport parameter from the server,
+
+* absence of the retry_connection_id transport parameter from the server after
+  receiving a Retry packet,
+
+* presence of the retry_connection_id transport parameter when no Retry packet
+  was received, or
+
+* a mismatch between values received from a peer in these transport parameters
+  and the value sent in the corresponding Destination Connection ID fields of
+  Initial packets.

> the client will then use this value as its DCID for the next Initial

Yeah, that was my thought.  The Retry.SCID thing is a choice people are free to use, but that doesn't need to be written down.  This way is simpler.

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