Re: [quicwg/base-drafts] Don't store or retransmit PATH_RESPONSE frames, avoid buffering (#2729)

[Kazuho Oku <[e-mail]>]

kazuho commented on this pull request.



> @@ -1721,7 +1721,12 @@ it can associate the peer's response with the corresponding PATH_CHALLENGE.
 ## Path Validation Responses
 
 On receiving a PATH_CHALLENGE frame, an endpoint MUST respond immediately by
-echoing the data contained in the PATH_CHALLENGE frame in a PATH_RESPONSE frame.
+echoing the data contained in the PATH_CHALLENGE frame in a PATH_RESPONSE frame,
+unless it has PATH_RESPONSE frames buffered for the same destination connection
+ID and wishes to limit memory consumption.
+
+An endpoint MUST NOT store or retransmit a PATH_RESPONSE frame, as a new
+PATH_CHALLENGE frame will be sent if another PATH_RESPONSE frame is needed.
 

Maybe something like: "An endpoint MUST NOT send more than one PATH_RESPONSE frame in response to one PATH_REQUEST frame, as a new ..."

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