library/GTP_Emulation: Make GTPv1C port optional

The port is not needed when emulating HNBGW, since the setup of GTPv1U
happens through RAB-ASsReq/resp.

Change-Id: I3ffb54d0cb8b3a81ed5235feaaac6d989baf6e0d
---
M library/GTP_Emulation.ttcn
1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/library/GTP_Emulation.ttcn b/library/GTP_Emulation.ttcn
index afe4217..aa620ed 100644
--- a/library/GTP_Emulation.ttcn
+++ b/library/GTP_Emulation.ttcn
@@ -30,8 +30,8 @@
 const integer GTP1U_PORT := 2152;
 
 type record GtpEmulationCfg {
-	HostName gtpc_bind_ip,
-	PortNumber gtpc_bind_port,
+	HostName gtpc_bind_ip optional,
+	PortNumber gtpc_bind_port optional,
 	HostName gtpu_bind_ip optional,
 	PortNumber gtpu_bind_port optional,
 	boolean sgsn_role
@@ -213,10 +213,12 @@
 private function f_init(GtpEmulationCfg cfg) runs on GTP_Emulation_CT {
 	var Result res;
 
-	map(self:GTPC, system:GTPC);
-	res := GTPv1C_CodecPort_CtrlFunct.f_IPL4_listen(GTPC, cfg.gtpc_bind_ip,
-						     cfg.gtpc_bind_port, {udp:={}});
-	g_gtpc_id := res.connId;
+	if (isvalue(cfg.gtpc_bind_ip) and isvalue(cfg.gtpc_bind_port)) {
+		map(self:GTPC, system:GTPC);
+		res := GTPv1C_CodecPort_CtrlFunct.f_IPL4_listen(GTPC, cfg.gtpc_bind_ip,
+							cfg.gtpc_bind_port, {udp:={}});
+		g_gtpc_id := res.connId;
+	}
 
 	if (isvalue(cfg.gtpu_bind_ip) and isvalue(cfg.gtpu_bind_port)) {
 		map(self:GTPU, system:GTPU);

