s1gw: rework module parameter naming, add mp_s1gw_mme_ip

Change-Id: Ice665662c8448c8314d5e6cc1e401e62b635872c
Related: SYS#6772
diff --git a/s1gw/S1GW_Tests.cfg b/s1gw/S1GW_Tests.cfg
index 336be14..536f0ec 100644
--- a/s1gw/S1GW_Tests.cfg
+++ b/s1gw/S1GW_Tests.cfg
@@ -11,6 +11,9 @@
 [TESTPORT_PARAMETERS]
 
 [MODULE_PARAMETERS]
+S1GW_Tests.mp_s1gw_enb_ip := "127.0.1.1";
+S1GW_Tests.mp_s1gw_mme_ip := "127.0.2.1";
+S1GW_Tests.mp_mme_bind_ip := "127.0.2.10";
 
 [MAIN_CONTROLLER]
 
diff --git a/s1gw/S1GW_Tests.ttcn b/s1gw/S1GW_Tests.ttcn
index df988d5..c7c55ef 100644
--- a/s1gw/S1GW_Tests.ttcn
+++ b/s1gw/S1GW_Tests.ttcn
@@ -32,8 +32,9 @@
 import from S1AP_Server all;
 
 modulepar {
-	charstring mp_s1gw_ip := "127.0.1.1";
-	charstring mp_mme_bind_ip := "127.0.2.10";
+	charstring mp_s1gw_enb_ip;	/* eNB facing address of the S1GW */
+	charstring mp_s1gw_mme_ip;	/* MME facing address of the S1GW */
+	charstring mp_mme_bind_ip;	/* MME address on which we get connections from S1GW */
 }
 
 private type record of ConnHdlr ConnHdlrList;
@@ -112,7 +113,7 @@
 
 	/* initiate SCTP connection establishment */
 	res := S1AP_CodecPort_CtrlFunct.f_IPL4_connect(S1AP_ENB,
-						       mp_s1gw_ip, 36412,
+						       mp_s1gw_enb_ip, 36412,
 						       "0.0.0.0", 0, -1,
 						       { sctp := c_SctpTuple_S1AP });
 	if (not ispresent(res.connId)) {