[quicwg/base-drafts] Receiving same New Connection ID twice (#1738)

[Christian Huitema <[e-mail]>]

All frames are idempotent. I read that to mean that if the same New Connection ID frame is received twice, the second transmission should be a no-op. I assume that "same frame" here means the same connection ID, the same reset secret, and the same sequence if we still care about sequences. That much is fine. But what if the two frames are almost the same, say with the same connection ID and a different reset secret? Should the node update the previously received secret, or should it signal a protocol violation?

A variation of that happens if the node sends a "New Connection ID" frame, and the connection ID is the same as the source ID used by that node. I assume it is a protocol violation. Or is it just a nice way for clients to tell servers about their reset secret?

(I realize that there may be work in progress in some secret PR -- but then, please submit it to the main repo.)

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