Re: [quicwg/base-drafts] Immediately close with INVALID_TOKEN (#3107)

[Kazuho Oku <[e-mail]>]

kazuho commented on this pull request.



> @@ -1641,6 +1641,13 @@ of connection establishment.  By giving the client a different connection ID to
 use, a server can cause the connection to be routed to a server instance with
 more resources available for new connections.
 
+If a server receives a client Initial that can be unprotected but contains an
+invalid Retry token, it knows the client will not accept another Retry token.
+It can either proceed with the handshake without verifying the token or
+immediately close ({{immediate-close}}) the connection with a connection
+error of INVALID_TOKEN to cause the handshake to fail quickly instead of
+waiting for the client to timeout.

By state I mean the closing and the draining state that gets built and retained once you invoke {immediate-close}. We should not recommend such behavior as it would create a DoS vector. But if it is not going to be a SHOULD but instead “can” or MAY, I think we can be precise and therefor the text we have now is fine.

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