asterisk: sip: Fail rx unexpected msg during unregister

Change-Id: Ibcf65b22925e990e4d13661204eaba1b471b6a5d
---
M asterisk/SIP_ConnectionHandler.ttcn
1 file changed, 12 insertions(+), 0 deletions(-)

diff --git a/asterisk/SIP_ConnectionHandler.ttcn b/asterisk/SIP_ConnectionHandler.ttcn
index c3d955a..5f76ad2 100644
--- a/asterisk/SIP_ConnectionHandler.ttcn
+++ b/asterisk/SIP_ConnectionHandler.ttcn
@@ -350,6 +350,7 @@
 
 	via.viaBody[0].viaParams := f_sip_param_set(via.viaBody[0].viaParams, "branch", branch_value);
 	from_addr.fromParams := f_sip_param_set(from_addr.fromParams, "tag", f_sip_rand_tag());
+	SIP.clear;
 	SIP.send(ts_SIP_REGISTER(g_pars.registrar_sip_req_uri,
 				 g_pars.registrar_sip_call_id,
 				 from_addr,
@@ -416,6 +417,8 @@
 				g_pars.registrar_sip_seq_nr, "OK");
 		as_SIP_expect_resp(exp);
 		}
+	[] as_SIP_fail_resp("(un)REGISTER 200 OK");
+	[] as_SIP_fail_req("(un)REGISTER 200 OK");
 	}
 
 	/* Prepare for next use: */

