Re: [quicwg/base-drafts] Add Advice and Rules for CONN_CLOSE in Initial and Handshake (#1786)

[martinduke <[e-mail]>]

> Mostly OK, but you might have already processed some frames when you hit the CONNECTION_CLOSE. We'd need to address that.

Yes, there are some unpleasant corner cases there.

> Send with the keys you know that your peer has. That is, if you have received X, send with X. You might already be sending with X+1, but it isn't always guaranteed that your peer has X+1. For instance, the server might be sending Handshake packets, but the client might not have processed all of the Initial yet.

This doesn't work with the second item. If I've received context X while having sent X+1, this rule would force me to send CONN_CLOSE in X. If X+1 arrives first, the receiver would ignore X.

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