asterisk: IMS: Validate Expires=600000 in REGISTER as per specs

Change-Id: Ibf2e3ff36d0c7cc84d25328ffdf87a6cedc8a37b
---
M asterisk/IMS_ConnectionHandler.ttcn
1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/asterisk/IMS_ConnectionHandler.ttcn b/asterisk/IMS_ConnectionHandler.ttcn
index c06df15..7819e62 100644
--- a/asterisk/IMS_ConnectionHandler.ttcn
+++ b/asterisk/IMS_ConnectionHandler.ttcn
@@ -34,6 +34,7 @@
 	charstring mp_ipsec_setup_script_path := "./IMS_ipsec_setup.sh";
 }
 
+const integer c_def_expires := 600000; /* 3GPP TS 24.229 5.1.1.2.1 e) */
 const char c_sip_server_name := "osmo-ttcn3-hacks/0.23";
 
 
@@ -476,6 +477,7 @@
 				tr_From(),
 				tr_To(),
 				tr_Via_from(?),
+				expires := tr_Expires(int2str(c_def_expires)),
 				require := tr_Require(superset("sec-agree")),
 				security_client := tr_Security_client(superset(tr_Security_mechanism("ipsec-3gpp",
 												     superset(tr_Param("alg","hmac-sha-1-96"))))),
@@ -519,8 +521,6 @@
 		 */
 		f_ims_validate_register_P_Access_Network_info(g_rx_sip_req, exp_present := false);
 
-		/* TODO: Validate "Expires" is 600000 */
-
 		/* Tx 100 Tyring */
 		tx_resp := ts_SIP_Response_Trying(sip_call_id,
 					from_addr,

