Re: [quicwg/base-drafts] Sequence for Connection IDs, RETIRE (#1829)

[Mike Bishop <[e-mail]>]

MikeBishop commented on this pull request.



> @@ -1249,8 +1252,11 @@ using the NEW_CONNECTION_ID frame ({{frame-new-connection-id}}).
 ### Issuing Connection IDs
 
 The initial connection ID issued by an endpoint is the Source Connection ID
-during the handshake.  Subsequent connection IDs are communicated to the peer
-using NEW_CONNECTION_ID frames ({{frame-new-connection-id}}).
+during the handshake.  The sequence number of the initial connection ID is 0. If

We can avoid that if the entire CID is sent in the RETIRE_CID frame.  That would mean, instead, that issuers need to stop using the contained CID for the current connection iff they are and absorb duplicates by silently consuming RETIRE messages for CIDs which aren't associated with the connection.

By having the sequence number in the RETIRE_CID frame, we make it shorter (one varint) and enable using the same deduplicating code as the consumer of NEW_CID messages.

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