Re: [quicwg/base-drafts] Limit connection drops from Version Negotiation (#3533)

David Schinazi <> Thu, 19 March 2020 00:02 UTC

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Subject: Re: [quicwg/base-drafts] Limit connection drops from Version Negotiation (#3533)
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DavidSchinazi approved this pull request.

> -future versions of QUIC to negotiate the version in use between endpoints.
-Future versions of QUIC might change how implementations that support multiple
-versions of QUIC react to Version Negotiation packets when attempting to
-establish a connection using this version.  How to perform version negotiation
-is left as future work defined by future versions of QUIC.  In particular,
-that future work will need to ensure robustness against version downgrade
-attacks; see {{version-downgrade}}.
+Version Negotiation packets are designed to allow future versions of QUIC to
+negotiate the version in use between endpoints.  Future versions of QUIC might
+change how implementations that support multiple versions of QUIC react to
+Version Negotiation packets when attempting to establish a connection using this
+A client that supports only this version of QUIC MUST abandon the current
+connection attempt if it receives a Version Negotiation packet.  However, a
+client MUST discard any Version Negotiation packet if is has received and

typo: if *it* has received

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