Re: [quicwg/base-drafts] Rewrite text about Version Negotiation (#1039)

[martinduke <[e-mail]>]

martinduke commented on this pull request.



> +If a server receives a packet with an unknown connection ID, an unsupported
+version, and is long enough to be an Initial packet for some version
+supported by the server, it SHOULD send a Version Negotiation packet as
+described in {{send-vn}}.
+
+Servers MUST drop other packets that contain unsupported versions.
+
+If the packet is a supported version, and an Initial Packet fully
+conforming with the specification, the server MUST proceed with the
+handshake ({{handshake}}).  This commits the server to the version that the
+client selected.
+
+If the packet is a supported version, and a Handshake or 0RTT packet, the
+server MAY buffer a limited number of these packets in anticipation of
+a late-arriving Initial Packet. In the event the server later generates
+a RETRY packet, this buffer should be purged. Servers MUST NOT send packets

"the server doesn't have the context to respond without the contents of the Initial. "

I was trying to make sure no acks were sent, but I see now that you're right. We can't decrypt (and therefore can't ack) 0-RTT packets, and we couldn't possibly receive other Handshake packets if we havent' seen the Initial. Good catch.

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