Re: [quicwg/base-drafts] Added normative text to invariants (#3774)

[Igor Lubashev <[e-mail]>]

@igorlord commented on this pull request.



> +packet, and if it understands that version, parse and process packets with one
+of those connection IDs without regard for the invariants in this document.
+
+Intermediaries MUST implement a mode that, if they cannot associate a version
+with a packet's connection ID or do not understand the associated QUIC version,
+uses only the invariant fields described in this document to execute its
+function(s). This might mean that the intermediary cannot accomplish its
+function(s) at all, or that it implements a default behavior.
+
+Intermediaries MUST NOT implement a default behavior of dropping packets of QUIC
+versions they do not understand, or packets that have a connection ID they
+cannot associate with a QUIC version.
+
+Specifications for intermediaries SHOULD document any implicit assumptions they
+are making about endpoint behavior beyond the invariants in this document, and
+the impact if future versions of QUIC violate those assumptions.

Or "deviate from", depending on your taste.

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