Re: [quicwg/base-drafts] Use the FRAME_ENCODING_ERROR for errors in frame encoding (#3042)

Kazuho Oku <notifications@github.com> Wed, 18 September 2019 07:25 UTC

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Subject: Re: [quicwg/base-drafts] Use the FRAME_ENCODING_ERROR for errors in frame encoding (#3042)
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kazuho commented on this pull request.



> @@ -5060,8 +5059,8 @@ the offset of the next byte that would be sent.
 The first byte in the stream has an offset of 0.  The largest offset delivered
 on a stream - the sum of the offset and data length - cannot exceed 2^62-1, as
 it is not possible to provide flow control credit for that data.  Receipt of a
-frame that exceeds this limit will be treated as a connection error of type
-FLOW_CONTROL_ERROR.
+frame that exceeds this limit MUST be treated as a connection error of type
+FRAME_ENCODING_ERROR or FLOW_CONTROL_ERROR.

My point is that if we are going to permit the use of FRAME_ENCODING_ERROR when the STREAM frame exceeds the 2<sup>62</sup> boundary, then we should also permit the use of FRAME_ENCODING_ERROR for MAX_STREAMS frame carrying a count exceeding 2<sup>60</sup>.

My weak preference is to not do either of the two, as we'd be losing a clear signal. IMO, this discussion is about the error code to be used when integrity check for certain frames fail. We can argue that integrity check is not part of frame decoding. Then, it would be natural to use the more specific error codes.

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