[Ntp] Antw: [EXT] [Errata Verified] RFC5905 (5020)

>>> RFC Errata System <rfc-editor@rfc-editor.org> schrieb am 27.07.2022 um
17:06 in
Nachricht <20220727150611.170A66AB09@rfcpa.amsl.com>:
> The following errata report has been verified for RFC5905,
> "Network Time Protocol Version 4: Protocol and Algorithms Specification". 
> 
> --------------------------------------
> You may review the report below and at:
> https://www.rfc-editor.org/errata/eid5020 
> 
> --------------------------------------
> Status: Verified
> Type: Technical
> 
> Reported by: Ferenc Wágner <wferi@niif.hu>
> Date Reported: 2017-05-15
> Verified by: Erik Kline (IESG)
> 
> Section: 8
> 
> Original Text
> -------------
> theta = T(B) - T(A) = 1/2 * [(T2-T1) + (T3-T4)]
> 
> Corrected Text
> --------------
> theta = T(B) - T(A) = 1/2 * [(T2-T1) + (T4-T3)]

If that's wrong, RFC 1305 would be just as wrong, because it says (page 25 in
PDF):
((Ti−2 − Ti−3) + (Ti−1 − Ti)) / 2
,

> 
> Notes
> -----
> The corresponding code line in A.5.1.1. agrees with this correction:
> 
> offset = (LFP2D(r->rec - r->org) + LFP2D(r->dst - r->xmt)) / 2;
> 
> taking Figure 7 into account:
> 
> | org       | T1         | origin timestamp      |
> | rec       | T2         | receive timestamp     |
> | xmt       | T3         | transmit timestamp    |
> | dst       | T4         | destination timestamp |
> 
> --------------------------------------
> RFC5905 (draft-ietf-ntp-ntpv4-proto-13)
> --------------------------------------
> Title               : Network Time Protocol Version 4: Protocol and 
> Algorithms Specification
> Publication Date    : June 2010
> Author(s)           : D. Mills, J. Martin, Ed., J. Burbank, W. Kasch
> Category            : PROPOSED STANDARD
> Source              : Network Time Protocols
> Area                : Internet
> Stream              : IETF
> Verifying Party     : IESG
> 
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