Change in osmo-ttcn3-hacks[master]: sgsn: Allow f_gtpu_xceive_mt() to verify non-forwarding case

[laforge]

laforge has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/18889 )


Change subject: sgsn: Allow f_gtpu_xceive_mt() to verify non-forwarding case
......................................................................

sgsn: Allow f_gtpu_xceive_mt() to verify non-forwarding case

In some scenarios we do not expect a PDU from GTP to show up on
the Gb side.  Let's add support for this.

Change-Id: Ia9fde1d433657c920ee1ec4d41004f4544ceb346
Related: OS#4616
---
M sgsn/SGSN_Tests.ttcn
1 file changed, 11 insertions(+), 2 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/89/18889/1

diff --git a/sgsn/SGSN_Tests.ttcn b/sgsn/SGSN_Tests.ttcn
index eeb4015..c157d39 100644
--- a/sgsn/SGSN_Tests.ttcn
+++ b/sgsn/SGSN_Tests.ttcn
@@ -1502,15 +1502,24 @@
 }
 
 /* Transceive given 'payload' as MT message from GTP -> OsmoSGSN -> Gb */
-private function f_gtpu_xceive_mt(inout PdpActPars apars, octetstring payload, integer ran_index := 0)
+private function f_gtpu_xceive_mt(inout PdpActPars apars, octetstring payload, integer ran_index := 0, boolean expect_fwd := true)
 runs on BSSGP_ConnHdlr {
+	timer T := 5.0;
 	/* Send PDU via GTP from our simulated GGSN to the SGSN */
 	f_gtpu_send(apars, payload);
+	T.start;
 	/* Expect PDU via BSSGP/LLC on simulated PCU from SGSN */
 	alt {
 	[] as_xid(apars, ran_index);
 	//[] BSSGP[ran_index].receive(tr_BD_SNDCP(apars.sapi, tr_SN_UD(apars.nsapi, payload)));
-	[] BSSGP[ran_index].receive(tr_SN_UD(apars.nsapi, payload));
+	[expect_fwd] BSSGP[ran_index].receive(tr_SN_UD(apars.nsapi, payload));
+	[expect_fwd] T.timeout {
+		setverdict(fail, "Timeout waiting for GTP-U to appear on BSSGP");
+		}
+	[not expect_fwd] BSSGP[ran_index].receive(tr_SN_UD(apars.nsapi, payload)) {
+		setverdict(fail, "GTP-U forwarded to BSSGP but not expected")
+		}
+	[not expect_fwd] T.timeout {}
 	}
 }
 

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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: Ia9fde1d433657c920ee1ec4d41004f4544ceb346
Gerrit-Change-Number: 18889
Gerrit-PatchSet: 1
Gerrit-Owner: laforge <laforge at osmocom.org>
Gerrit-MessageType: newchange
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