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require ACKs and allow PADDING in the Server Stateless Retry packet #882

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6 changes: 3 additions & 3 deletions draft-ietf-quic-transport.md
Expand Up @@ -627,9 +627,9 @@ any version negotiation that occurred (see {{version-negotiation}}). The client
MAY also retain any observed RTT or congestion state that it has accumulated for
the flow, but other transport state MUST be discarded.

The payload of the Retry packet contains at least two frames. It MUST include a
STREAM frame on stream 0 with offset 0 containing the server's cryptographic
stateless retry material. It MUST also include an ACK frame to allow the client
The payload of the Retry packet contains at least two frames. It MUST include a
STREAM frame on stream 0 with offset 0 containing the server's cryptographic
stateless retry material. It MUST also include an ACK frame to allow the client
a first RTT measurement. It MAY additionally include one ore more PADDING frames.
The next STREAM frame sent by the server will also start at stream offset 0.

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