Re: [quicwg/base-drafts] Clarify which packet losses may be ignored (#3450)

ianswett <notifications@github.com> Fri, 28 February 2020 01:56 UTC

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Subject: Re: [quicwg/base-drafts] Clarify which packet losses may be ignored (#3450)
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ianswett commented on this pull request.



> @@ -690,12 +690,14 @@ losses or increases in the ECN-CE counter.
 
 ## Ignoring Loss of Undecryptable Packets	
 
-During the handshake, some packet protection keys might not be	
-available when a packet arrives. In particular, Handshake and 0-RTT packets	
-cannot be processed until the Initial packets arrive, and 1-RTT packets	
-cannot be processed until the handshake completes.  Endpoints MAY	
-ignore the loss of Handshake, 0-RTT, and 1-RTT packets that might arrive before	
-the peer has packet protection keys to process those packets.	
+During the handshake, some packet protection keys might not be available when
+a packet arrives and the receiver can choose to drop the packet. In particular,
+Handshake and 0-RTT packets cannot be processed until the Initial packets
+arrive and 1-RTT packets cannot be processed until the handshake completes.
+Endpoints MAY ignore the loss of Handshake, 0-RTT, and 1-RTT packets that might
+have arrived before the peer has packet protection keys to process those
+packets. Endpoints MUST NOT ignore the loss of packets that were sent after
+the earliest acknowledged packet in a given packet number space.
 

#3415 makes that extra clear I think.

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