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Allow Retry in response to 0-RTT packets #1552

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Jul 31, 2018
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5 changes: 4 additions & 1 deletion draft-ietf-quic-transport.md
Original file line number Diff line number Diff line change
Expand Up @@ -594,7 +594,10 @@ of subsequent packets that it sends.
A Retry packet does not include a packet number and cannot be explictly
acknowledged by a client.

A server MUST only send a Retry in response to a client Initial packet.
A server MUST NOT send a Retry in response to packets other than Initial
or 0-RTT packets. A server MAY choose to only send Retry in response to Initial
packets and discard or buffer 0-RTT packets corresponding to unvalidated client
addresses.

If the Original Destination Connection ID field does not match the Destination
Connection ID from the most recent Initial packet it sent, clients MUST discard
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