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RFC 5905, "Network Time Protocol Version 4: Protocol and Algorithms Specification", June 2010

Source of RFC: ntp (int)

Errata ID: 5020

Status: Reported
Type: Technical

Reported By: Ferenc Wágner
Date Reported: 2017-05-15

Section 8 says:

theta = T(B) - T(A) = 1/2 * [(T2-T1) + (T3-T4)]

It should say:

theta = T(B) - T(A) = 1/2 * [(T2-T1) + (T4-T3)]

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 |

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