[core] [Errata Verified] RFC7959 (7523)

RFC Errata System <rfc-editor@rfc-editor.org> Sat, 08 July 2023 00:14 UTC

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Subject: [core] [Errata Verified] RFC7959 (7523)
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The following errata report has been verified for RFC7959,
"Block-Wise Transfers in the Constrained Application Protocol (CoAP)". 

--------------------------------------
You may review the report below and at:
https://www.rfc-editor.org/errata/eid7523

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Status: Verified
Type: Editorial

Reported by: Christian Amsüss <christian@amsuess.com>
Date Reported: 2023-05-24
Verified by: Murray Kucherawy (IESG)

Section: 3

Original Text
-------------
   then the block number (NUM), more bit (M), and block size exponent
   (2**(SZX+4)) separated by slashes.  For example, a Block2 Option

Corrected Text
--------------
   then the block number (NUM), more bit (M), and block size
   (2**(SZX+4)) separated by slashes.  For example, a Block2 Option

Notes
-----
The examples are given in the style of "2:1/1/128", wher 128 is the size (2**(SZX+4)), not the size exponent -- it contains the size exponent in the expression, but the full expression is the size.

(Reporting this as an erratum because the use of "SZX" for "size" instead of "size exponent" has some potential for spreading and creating confusion; for example in Wireshark at https://gitlab.com/wireshark/wireshark/-/merge_requests/10763)

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RFC7959 (draft-ietf-core-block-21)
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Title               : Block-Wise Transfers in the Constrained Application Protocol (CoAP)
Publication Date    : August 2016
Author(s)           : C. Bormann, Z. Shelby, Ed.
Category            : PROPOSED STANDARD
Source              : Constrained RESTful Environments
Area                : Applications and Real-Time
Stream              : IETF
Verifying Party     : IESG