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neels gerrit-no-reply at lists.osmocom.orgneels has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/24827 ) Change subject: msc: inter-MSC HO test: use CGI cell ID, not LAI ...................................................................... msc: inter-MSC HO test: use CGI cell ID, not LAI Fixes inter-MSC handover tests: in the inter-MSC 'Handover Required', do not send a LAI cell identifier, but a CGI one. This is analogous to the fix applied to inter-BSC HO in I48276acf923626db171683dfa03ef43614a71380. Rationale: As explained in OS#5188, 3GPP TS 48.008 allows a LAI identification only in the Cell Identifier List IE, but not in the single Cell Identifier IE. In the inter-MSC HO test's Handover Required message, we so far send a LAI identifier in a List IE to osmo-msc. And so far, osmo-msc simply echos that in the Handover Request message's single Cell Id IE. The LAI is, as actually defined in the spec, omitted from the single IE in deps/titan.ProtocolModules.BSSMAP/src/BSSAP_Types.ttcn, and when osmo-msc sends the non-standard LAI Id, ttcn3 fails to parse the BSSMAP Handover Request message: the Cell Identifier IE gets wrong values, and all remaining IEs are parsed as 'omit' even though they are present on the wire. So as long as osmo-msc sends back a LAI Id, we cannot sanely verify the Handover Request received from the MSC. The CGI identifier type is supported in both IEs. So when the test sends a CGI identifier in the Handover Required, osmo-msc will also reflect a CGI identifier in the Handover Request, and ttcn3 parsing works. Related: OS#5188 SYS#5324 Change-Id: I525b5deaa9634fcdb63fbd2c97c767aff045767c --- M msc/MSC_Tests.ttcn 1 file changed, 1 insertion(+), 1 deletion(-) git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/27/24827/1 diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn index e548c5c..a165d5c 100644 --- a/msc/MSC_Tests.ttcn +++ b/msc/MSC_Tests.ttcn @@ -5985,7 +5985,7 @@ var BssmapCause cause := enum2int(cause_val); var template BSSMAP_FIELD_CellIdentificationList cil; - cil := { cIl_LAI := { ts_BSSMAP_CI_LAI('017'H, '017'H, 1) } }; + cil := { cIl_CGI := { ts_BSSMAP_CI_CGI('017'H, '017'H, 1, 1) } }; /* old BSS sends Handover Required */ BSSAP.send(ts_BSSMAP_HandoverRequired(cause, cil)); -- To view, visit https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/24827 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-ttcn3-hacks Gerrit-Branch: master Gerrit-Change-Id: I525b5deaa9634fcdb63fbd2c97c767aff045767c Gerrit-Change-Number: 24827 Gerrit-PatchSet: 1 Gerrit-Owner: neels <nhofmeyr at sysmocom.de> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20210702/b657c4a6/attachment.htm>