GTP_Emulation: SGSN_ContextRequest: Fix unconditional access to optional field IMSI
Change-Id: I254f790aeb7c491200b86bec3c22ae56c452c2df
diff --git a/library/GTP_Emulation.ttcn b/library/GTP_Emulation.ttcn
index 4ea293c..6297c4f 100644
--- a/library/GTP_Emulation.ttcn
+++ b/library/GTP_Emulation.ttcn
@@ -136,7 +136,11 @@
} else if (ischosen(gtp.gtpc_pdu.sgsn_ContextRequest)) {
return gtp.gtpc_pdu.sgsn_ContextRequest.imsi.digits;
} else if (ischosen(gtp.gtpc_pdu.sgsn_ContextResponse)) {
- return gtp.gtpc_pdu.sgsn_ContextResponse.imsi.digits;
+ if (ispresent(gtp.gtpc_pdu.sgsn_ContextResponse.imsi.digits)) {
+ return gtp.gtpc_pdu.sgsn_ContextResponse.imsi.digits;
+ } else {
+ return omit;
+ }
} else if (ischosen(gtp.gtpc_pdu.forwardRelocationRequest)) {
return gtp.gtpc_pdu.forwardRelocationRequest.imsi.digits;
} else if (ischosen(gtp.gtpc_pdu.relocationCancelRequest)) {