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

[Mike Bishop <[e-mail]>]

@MikeBishop approved 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.

```suggestion
  Initial packets or the Source Connection ID field of a Retry packet.
```
...though perhaps this is fine, since the client will then use this value as its DCID for the next Initial packet.

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