TCNOpen / Tickets / #240 TRDP topography counter check not standard conform

Components for IEC61375 standardised communication

#240 TRDP topography counter check not standard conform

Milestone: 1.4.2.0

Status: wont-fix

Owner: Bernd Löhr

Labels: None

Updated: 2019-06-12

Created: 2019-02-27

Creator: Stefan Bender

Private: No

The function trdp_validTopoCounters does not validate incoming consist local messages that have an etbTopoCnt of 0 and the actual opTrnTopoCnt.
Consist local messages should be sent without an etbTopoCnt, but a valid opTrnTopoCnt. Neither the table A.5 in the standard nor the TCNOpen implementation account for this.

Discussion

Bernd Löhr - 2019-06-12

status: open --> wont-fix
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Bernd Löhr - 2019-06-12

We will follow the standard here – opTrnTopoCnt == SafeTopoCount in SDTv2 and can "be set to 0 for consist network internal communication" (IEC61375-2-3 B.8).
This is means that in a single consist safe communication will not be secured by verifying the leading direction... :-0

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TRDP topography counter check not standard conform

Components for IEC61375 standardised communication

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#240 TRDP topography counter check not standard conform

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