lynxis lazus has uploaded this change for review.

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SGSN_Tests: Context Req In: use correct TEID-C

For a MS/UE moving from 2G to 4G, the Ctx Acks need to transmit
with the correct TEID-C which the SGSN chosen in the Context Response.

Change-Id: I84dc7dda8ee1227edd68d1482a4c5bf267c16418
---
M sgsn/SGSN_Tests.ttcn
1 file changed, 6 insertions(+), 2 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/20/38920/1

diff --git a/sgsn/SGSN_Tests.ttcn b/sgsn/SGSN_Tests.ttcn
index 03a0ebb..2ddeaff 100644
--- a/sgsn/SGSN_Tests.ttcn
+++ b/sgsn/SGSN_Tests.ttcn
@@ -3082,12 +3082,16 @@
 	T.start(2.0);
 	alt {
 	[] GTP[GTP_GGSN_IDX].receive(tr_GTPC_SGSNContextResp(?, ?, ctx_rsp)) -> value gtpc_ud {
+		var OCT4 remote_teidc := gtpc_ud.gtpc.gtpc_pdu.sgsn_ContextResponse.teidControlPlane.teidControlPlane;
+
 		log("Rx SGSN Context Resp from SGSN, sending Ack");
-		GTP[GTP_GGSN_IDX].send(ts_GTPC_SGSNContextAck(gtpc_ud.peer, '12345678'O, seq_nr));
+		GTP[GTP_GGSN_IDX].send(ts_GTPC_SGSNContextAck(gtpc_ud.peer, remote_teidc, seq_nr));
 		setverdict(pass);
 		}
 	[] GTP[GTP_GGSN_IDX].receive(tr_GTPC_SGSNContextResp) -> value gtpc_ud {
-		GTP[GTP_GGSN_IDX].send(ts_GTPC_SGSNContextAck(gtpc_ud.peer, '12345678'O, seq_nr,
+		var OCT4 remote_teidc := gtpc_ud.gtpc.gtpc_pdu.sgsn_ContextResponse.teidControlPlane.teidControlPlane;
+
+		GTP[GTP_GGSN_IDX].send(ts_GTPC_SGSNContextAck(gtpc_ud.peer, remote_teidc, seq_nr,
 						ts_SGSNContextAckPDU(GTP_CAUSE_INVALID_MSG_FORMAT)));
 		setverdict(fail, "Rx unexpected SGSN Context Resp");
 		}

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