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Feature #4729

ttcn3-pcu: Add test to validate IMSI parsing from GMM Attach Request

Added by pespin about 1 month ago. Updated 8 days ago.

Status:
Resolved
Priority:
Normal
Assignee:
Target version:
-
Start date:
08/26/2020
Due date:
% Done:

100%

Spec Reference:

Description

Recently osmo-pcu.git 0052051c07af63da98137c9f8e3b3119642eb587 introduced a bug where MS could not attach anymore to the network due to a typo, fixed in:
https://gerrit.osmocom.org/c/osmo-pcu/+/19822

However, none of out TTCN3 PCU tests noticed this failure. We should add a test making sure it coves related code and fails if a similar bug appears again.

"Failed to parse IMSI IE (rc=0)" 

Attached one can find a sample pcap trace with the GMM Attach Request (frame 248, this time with a TMSI, but to get the idea, in any case we should check both).

gmm_attach_request.pcapng.gz gmm_attach_request.pcapng.gz 20.9 KB pespin, 08/26/2020 12:06 PM
failure.pcapng failure.pcapng 67 KB pespin, 08/27/2020 04:31 PM

History

#1 Updated by pespin 29 days ago

Attached pcap with the actual issue (with the faulty patch not fixed running in osmo-pcu).

#2 Updated by pespin 29 days ago

  • Status changed from New to Feedback
  • % Done changed from 0 to 90

Done in here:
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/19854 pcu: Test Downlink UNIT_DATA messages from SGSN containing IMSI IE

#3 Updated by pespin 8 days ago

  • Status changed from Feedback to Resolved
  • % Done changed from 90 to 100

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