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LibIms_Steps.ttcn 66 KiB
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Enhance SIP support, Validation LIS/Lost
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            // deregistration in case of successful registration
            vc_DeregDone := false;
        }

        /**
         * @desc Sets variables and default initialization for user profile and handle registration and authentication with MD5
         * @param p_cSeq_s The current cseq
         * @param p_register Register template
         */
        function f_IMS_preamble_withRegistration(
            inout CSeq p_cSeq_s,
            out template REGISTER_Request p_register
        ) runs on ImsComponent  {

            //NOTE STF471: removed f_init_interfaceprofile(p_interface);
            // Variables & defaults initialization
            f_IMS_preamble_woRegistration(p_cSeq_s);

            // Preamble
            f_Registration(p_cSeq_s, p_register, PX_SIP_REGISTER_AUTHENTICATION_ENABLED);

            // deregistration in case of successful registration
            vc_DeregDone := false;

            f_setHeaders_SUBSCRIBE(p_cSeq_s);
            f_Subscription(p_cSeq_s, m_SUBSCRIBE_Request_UE(vc_requestUri, vc_callId, p_cSeq_s, vc_from, vc_to, vc_via, vc_contact, vc_route_REG));
        }

        //NOTE STF471 added
        /**
         * @desc Sets variables and default initialization for user profile and handle registration and authentication with MD5
         * @param p_cSeq_s The current cseq
         * @param p_register Register template
         */
        function f_IMS_preamble_withRegistrationWoSubscription(
            inout CSeq p_cSeq_s,
            out template REGISTER_Request p_register
        ) runs on ImsComponent  {
            //NOTE STF471: removed f_init_interfaceprofile(p_interface);

            // Variables & defaults initialization
            f_IMS_preamble_woRegistration(p_cSeq_s);

            // Preamble
            f_Registration(p_cSeq_s, p_register, PX_SIP_REGISTER_AUTHENTICATION_ENABLED);

            // deregistration in case of successful registration
            vc_DeregDone := false;
        }

        /**
         * @desc Sets variables and default initialization for user profile and handle registration and authentication with MD5 (basic registration template)
         * @param p_cSeq_s The current cseq
         * @param p_host P-CSCF domain name (formerly value from module parameter PX_IMS_TS_PCSCF_HOME_DOMAIN)
         * @param p_port P-CSCF port number (formerly value from module parameter PX_IMS_TS_PCSCF_PORT)
         */
        function f_IMS_preamble_withRegistrationBasic(
            inout CSeq p_cSeq_s,
            template(value) charstring p_host,
            template(value) integer p_port
        ) runs on ImsComponent  {
            //NOTE STF471: removed f_init_interfaceprofile(p_interface);
            // Variables & defaults initialization
            f_IMS_preamble_woRegistration(p_cSeq_s);

            // Preamble
            f_Registration_IMS(p_cSeq_s, PX_SIP_REGISTER_AUTHENTICATION_ENABLED, p_host, p_port);
            f_setHeaders_SUBSCRIBE(p_cSeq_s);
            f_Subscription(p_cSeq_s, m_SUBSCRIBE_Request_UE(vc_requestUri, vc_callId, p_cSeq_s, vc_from, vc_to, vc_via, vc_contact, vc_route_REG));
        }

        /**
         * @desc Sets variables and default initialization for user profile and handle registration and authentication with MD5 (basic registration template)
         * @param p_cSeq_s The current cseq
         */
        function f_IMS_preamble_AS(
            inout CSeq p_cSeq_s
        ) runs on ImsComponent  {
            // avoid deregistration in default behavior
            vc_DeregDone := true;
            vc_boo_route := true;
            vc_boo_recordRoute := true;
            vc_cSeq := p_cSeq_s;

            // Defaults
            vc_def_catchSyncStop := activate(a_Sip_catchSyncStop());
            vc_default := activate(a_altstep_AS());

            // Preamble
            //NOTE STF471: removed f_init_interfaceprofile(p_interface);
            //NOTE STF471: removed f_init_userprofile(p_userprofile); // assignment of PIXIT values to component variable
            vc_sdp_local := valueof(m_SDP_bandwidth(m_media_dynPT(PX_SIP_SDP_DYN, PX_SIP_SDP_ENCODING, PX_SIP_SDP_CLOCKRATE, omit), vc_userprofile));
            vc_contact := m_Contact(m_SipUrl_contactIpaddr(vc_userprofile));
        }

    } // end group preambles

    group postambles {

        /**
         * @desc Terminates component and handles deregistration
         * @param p_cSeq_s The current cseq
         */
        function f_IMS_postamble_withDeRegistration(
            CSeq p_cSeq_s
        ) runs on ImsComponent  {
            f_RemoveRegistration(p_cSeq_s);
            f_terminate_component();
        }

        /**
         * @desc Terminates component and optionally handles deregistration on AS as TS
         * @param p_deRegistration Handle deregistration?
         */
        function f_IMS_postamble_AS_withDeRegistration(
            boolean p_deRegistration
        ) runs on ImsComponent  {

            if (p_deRegistration == true) {
                f_awaitingREGISTER_sendReply(mw_REGISTER_Request_Base, true);
            }
            f_terminate_component();
        }

        /**
         * @desc Terminates component without registration
         */
        function f_SIP_postamble_IMS1_withoutRegistration(
        ) runs on ImsComponent  {
            f_terminate_component();
        }

        /**
         * @desc Terminates component without de-registration
         */
        function f_IMS_postamble_withoutDeRegistration(
        ) runs on ImsComponent  {
            f_terminate_component();
        }

        /**
         * @desc Terminates component with de-registration
         * @param p_to_user The selected user's SIP URL
         * @param p_qop of the peer UE (alternatively)
         */
        function f_SIP_postamble_IMS1_awaitDeRegistration(
            in SipUrl p_to_user,
            in charstring p_qop
        ) runs on ImsComponent  {
            var SipUrl v_passociated_url;
            // Awaiting 1st REGISTER
            f_awaitingREGISTER(mw_REGISTER_unauthorizedRequest_IMS);

            // 401 response
            f_sendResponse(m_Response_WWWauthenticate_IMS(c_statusLine401, vc_callId, vc_cSeq, vc_caller_From, vc_caller_To, vc_via, m_wwwAuthenticate(f_calculatecChallenge_forWWWAuthorization(p_qop, valueof(vc_authorization.body[0].digestResponse)))));

            // Awaiting 2nd REGISTER with authorization header
            f_awaitingREGISTER(mw_REGISTER_unauthorizedRequest_IMS);
            
            // 200OK to complete the request
            v_passociated_url := vc_caller_From.addressField.nameAddr.addrSpec;
            f_sendResponse(m_Response_2xxonREGISTER_IMS(c_statusLine200, vc_callId, vc_cSeq, vc_callee_From, vc_callee_To, vc_via, vc_contact, p_to_user, v_passociated_url));

            f_terminate_component();
        }

        /**
         * @desc Terminates component with de-registration
         * @param p_to_user The selected user's SIP URL
         * @param p_qop of the peer UE (alternatively)
         */
        function f_IMS_postamble_awaitDeRegistration(
            in SipUrl p_to_user,
            in charstring p_qop
        ) runs on ImsComponent  {
            var SipUrl v_passociated_url;
            // Awaiting 1st REGISTER
            f_awaitingREGISTER(mw_REGISTER_unauthorizedRequest_IMS);

            // 401 response
            f_sendResponse(m_Response_WWWauthenticate_IMS(c_statusLine401, vc_callId, vc_cSeq, vc_caller_From, vc_caller_To, vc_via, m_wwwAuthenticate(f_calculatecChallenge_forWWWAuthorization(p_qop, valueof(vc_authorization.body[0].digestResponse)))));

            // Awaiting 2nd REGISTER with authorization header
            f_awaitingREGISTER(mw_REGISTER_unauthorizedRequest_IMS);
            
            // 200OK to complete the request
            v_passociated_url := vc_caller_From.addressField.nameAddr.addrSpec;
            f_sendResponse(m_Response_2xxonREGISTER_IMS(c_statusLine200, vc_callId, vc_cSeq, vc_callee_From, vc_callee_To, vc_via, vc_contact, p_to_user, v_passociated_url));

            f_terminate_component();
        }


        /**
         * @desc Awaits de-registration
         * @param p_to_user The selected user's SIP URL
         * @param p_qop of the peer UE (alternatively)
         */
        function f_IMS_awaitDeRegistration(
            in SipUrl p_to_user,
            in charstring p_qop
        ) runs on ImsComponent  {
            var SipUrl v_passociated_url;
            // Awaiting 1st REGISTER
            f_awaitingREGISTER(mw_REGISTER_unauthorizedRequest_IMS);

            // 401 response
            f_sendResponse(m_Response_WWWauthenticate_IMS(c_statusLine401, vc_callId, vc_cSeq, vc_caller_From, vc_caller_To, vc_via, m_wwwAuthenticate(f_calculatecChallenge_forWWWAuthorization(p_qop, valueof(vc_authorization.body[0].digestResponse)))));

            // Awaiting 2nd REGISTER with authorization header
            f_awaitingREGISTER(mw_REGISTER_unauthorizedRequest_IMS);
            
            // 200OK to complete the request
            v_passociated_url := vc_caller_From.addressField.nameAddr.addrSpec;
            f_sendResponse(m_Response_2xxonREGISTER_IMS(c_statusLine200, vc_callId, vc_cSeq, vc_callee_From, vc_callee_To, vc_via, vc_contact, p_to_user, v_passociated_url));
        }

        //NOTE STF471: renamed f_SIP_postamble_UE(1|2)_withoutRegistration to f_SIP_postamble_UE_withoutRegistration
        /**
         * @desc Terminates component without registration
         */
        function f_SIP_postamble_UE_withoutRegistration(
        ) runs on ImsComponent  {
            f_terminate_component();
        }

        /**
         * @desc Sends BYE and awaits response (IMS)
         * @param p_requestUri The Request URI
         * @param p_callId CallId parameter for outgoing BYE
         * @param p_cSeq_s CSeq parameter for outgoing BYE
         * @param p_from From parameter for outgoing BYE
         * @param p_to To parameter for outgoing BYE
         */
        function f_terminateCall_IMS(
            SipUrl p_requestUri,
            CallId p_callId,
            inout CSeq p_cSeq_s,
            From p_from,
            template(value) To p_to
        ) runs on ImsComponent  {
            LibSip_Steps.f_setHeadersBYE(p_cSeq_s);
            // Sending of a BYE request to release the call and expect a final response
            f_SendBYE(m_BYE_Request_IMS(p_requestUri, p_callId, p_cSeq_s, p_from, p_to, vc_via, vc_route));

            tc_resp.start;
            alt {
                [] SIPP.receive(mw_Response_Base(mw_statusLine1xx, p_callId, p_cSeq_s)) {
                    repeat;
                }
                [] SIPP.receive(mw_Response_Base(mw_statusLineFinal, p_callId, p_cSeq_s)) {
                    tc_resp.stop;
                }
            // timeout should be handled in default_alt_step
            }
        } // end function f_terminateCall_IMS

        /**
         * @desc Sends BYE and awaits response (UE)
         * @param p_requestUri The Request URI
         * @param p_callId CallId parameter for outgoing BYE
         * @param p_cSeq_s CSeq parameter for outgoing BYE
         * @param p_from From parameter for outgoing BYE
         * @param p_to To parameter for outgoing BYE
         * @param p_recordRoute RecordRoute parameter for outgoing BYE - default: omit
         */
        function f_terminateCall_UE(
            SipUrl p_requestUri,
            CallId p_callId,
            inout CSeq p_cSeq_s,
            From p_from,
            template(value) To p_to,
            template RecordRoute p_recordRoute := omit
        ) runs on ImsComponent  {
            var Route v_route;
            LibSip_Steps.f_setHeadersBYE(p_cSeq_s);
            // Sending of a BYE request to release the call and expect a final response
            if (ispresent(p_recordRoute)) {
                v_route := {ROUTE_E, valueof(p_recordRoute.routeBody)};
                f_SendBYE(m_BYE_Request_UE(p_requestUri, p_callId, p_cSeq_s, p_from, valueof(p_to), vc_via, v_route));
            }
            else {
                f_SendBYE(m_BYE_Request_UE(p_requestUri, p_callId, p_cSeq_s, p_from, valueof(p_to), vc_via, vc_route));
            }

            tc_resp.start;
            alt {
                [] SIPP.receive(mw_Response_Base(mw_statusLine1xx, p_callId, p_cSeq_s)) {
                    repeat;
                }
                [] SIPP.receive(mw_Response_Base(mw_statusLineFinal, p_callId, p_cSeq_s)) {
                    tc_resp.stop;
                }
            // timeout should be handled in default_alt_step
            }
        } // end function f_terminateCall_UE

        /**
         * @desc Sends BYE and awaits response and De-registration
         * @param p_requestUri The Request URI
         * @param p_callId CallId parameter for outgoing BYE
         * @param p_cSeq_s CSeq parameter for outgoing BYE
         * @param p_from From parameter for outgoing BYE
         * @param p_to To parameter for outgoing BYE
         * @param p_qop of the peer UE (alternatively)
         */
        function f_terminateCall_UE_withDeReg(
            SipUrl p_requestUri,
            CallId p_callId,
            inout CSeq p_cSeq_s,
            From p_from,
            template(value) To p_to,
            in charstring p_qop
        ) runs on ImsComponent  {
            LibSip_Steps.f_setHeadersBYE(p_cSeq_s);
            // Sending of a BYE request to release the call and expect a final response
            f_SendBYE(m_BYE_Request_UE(p_requestUri, p_callId, p_cSeq_s, p_from, p_to, vc_via, vc_route));

            tc_resp.start;
            alt {
                [] SIPP.receive(mw_Response_Base(mw_statusLine1xx, p_callId, p_cSeq_s)) {
                    repeat;
                }
                [] SIPP.receive(mw_Response_Base(mw_statusLineFinal, p_callId, p_cSeq_s)) {
                    tc_resp.stop;
                }
            // timeout should be handled in default_alt_step
            }
            action("Please de-register");
            f_IMS_awaitDeRegistration(p_requestUri, p_qop);
        } // end function f_terminateCall_UE_withDeReg

    }
    group defaults {

        /**
         * @desc Altstep for clearing registration (IMS user)
         * @param p_to_user The selected user's SIP URL
         * @param p_qop of the peer UE (alternatively)
         * @verdict fail for all unexpected branches
         */
        altstep a_clearRegistration_IMSuser(
            in SipUrl p_to_user,
            in charstring p_qop
        ) runs on ImsComponent {
            var Response v_response;
            var Request v_request;
            var SUBSCRIBE_Request v_subscribe_request;
            var REGISTER_Request v_register_request;
            var BYE_Request v_bye_request;
            var CANCEL_Request v_cancel_request;
            var NOTIFY_Request v_notify_request;
            var INFO_Request v_info_request;
            var CSeq v_cSeq;
            [] any timer.timeout {
                log("*** " & testcasename() & ": FAIL: Timeout while waiting for message. ***");
                setverdict(fail);
                all timer.stop;
                vc_callId := vc_callIdReg;
                action("Please de-register");
                f_IMS_awaitDeRegistration(p_to_user, p_qop);
                f_componentStop();
            }
            // allow repeated INVITEs
            [vc_ignore_invite] SIPP.receive(mw_INVITE_Request_Base) {
                repeat;
            }
            // allow repeated BYEs after ack of the first BYE
            [vc_ignore_bye] SIPP.receive(mw_BYE_Request_Base(?)) {
                repeat;
            }
            [] SIPP.receive(mw_ACK_Request_Base(?)) {
                repeat;
            }
            // allow 100 replies
            [] SIPP.receive(mw_Response_Base(c_statusLine100, ?, ?)) {
                repeat;
            }
YannGarcia's avatar
Review Initial conditions for all Test Cases  
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            // ignore 181 if flag is set (following TS 183004 ����4.5.2.1)
Yann Garcia's avatar
Enhance SIP support, Validation LIS/Lost
Yann Garcia committed
1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 
            [vc_ignore181] SIPP.receive(mw_Response_Base(c_statusLine181, vc_callId, vc_cSeq)) -> value v_response sender vc_sent_label {
                v_cSeq := valueof(v_response.msgHeader.cSeq);
                f_setHeadersOnReceiptOfResponse(v_response);
                repeat;
            }
            // according to SIP chap.8.1.3.2
            [] SIPP.receive(mw_Response_Base(c_statusLine183, vc_callId, vc_cSeq)) {
                repeat;
            }
            // ignore 484 if flag is set
            [vc_ignore484] SIPP.receive(mw_Response_Base(c_statusLine484, vc_callId, vc_cSeq)) {
                repeat;
            }
            [vc_ignore4xx] SIPP.receive(mw_Response_Base(mw_statusLine4xx, vc_callId, ?)) -> value v_response sender vc_sent_label {
                v_cSeq := valueof(v_response.msgHeader.cSeq);
                f_setHeadersOnReceiptOfResponse(v_response);
                f_SendACK(m_ACK_Request_route(vc_requestUri, vc_callId, v_response.msgHeader.cSeq, vc_from, vc_to, vc_via, vc_route));
                repeat;
            }
            [vc_ignore200OKinv] SIPP.receive(mw_Response_Base(c_statusLine200, vc_callId, ?)) {
                repeat;
            }
            [] SIPP.receive(mw_INFO_Request_Base(vc_callId)) -> value v_info_request sender vc_sent_label {
                f_setHeadersOnReceiptOfRequest(v_info_request);
                f_send200OK();
                repeat;
            }
            // awaiting of Notify
            [] SIPP.receive(mw_NOTIFY_Request_Base(vc_callId)) -> value v_notify_request sender vc_sent_label {
                f_setHeadersOnReceiptOfRequest(v_notify_request);
                f_send200OK();
                repeat;
            }
            // awaiting of subscribe from UE
            [vc_ignore_subscribe] SIPP.receive(mw_SUBSCRIBE_Request_Base) -> value v_subscribe_request sender vc_sent_label {
                f_setHeadersOnReceiptOfSUBSCRIBE(v_subscribe_request);
                f_send200OK();
                repeat;
            }
            // awaiting of subscribe on proxy
            [] SIPP.receive(mw_SUBSCRIBE_Request_Base) -> value v_subscribe_request sender vc_sent_label {
                f_setHeadersOnReceiptOfRequest(v_subscribe_request);
                f_sendResponse(m_Response_Contact(c_statusLine200, vc_callId, vc_cSeq, vc_callee_From, vc_callee_To, vc_via, vc_contact));
                f_SendNOTIFY(m_NOTIFY_Request_contact(v_subscribe_request.msgHeader.contact.contactBody.contactAddresses[0].addressField.nameAddr.addrSpec, vc_callId, vc_cSeq, vc_callee_From, vc_callee_To, vc_via, vc_contact));
                f_awaitingOkResponse(vc_cSeq);
                repeat;
            }
            // unexpected BYE is acknowledged to avoid retransmissions
            [] SIPP.receive(mw_BYE_Request_Base(?)) -> value v_bye_request sender vc_sent_label {
                log("*** " & testcasename() & ": FAIL: Unexpected BYE message received. ***");
                setverdict(fail);
                f_setHeadersOnReceiptOfRequest(v_bye_request);
                f_send200OK();
                action("Please de-register");
                f_IMS_awaitDeRegistration(p_to_user, p_qop);
                f_componentStop();
            }
            // unexpected CANCEL is acknowledged to avoid retransmissions
            [] SIPP.receive(mw_CANCEL_Request_Base(?)) -> value v_cancel_request sender vc_sent_label {
                log("*** " & testcasename() & ": FAIL: Unexpected CANCEL message received. ***");
                setverdict(fail);
                f_setHeadersOnReceiptOfRequest(v_cancel_request);
                // Answer to the CANCEL
                f_send200OK();
                action("Please de-register");
                f_IMS_awaitDeRegistration(p_to_user, p_qop);
                f_componentStop();
            }
            // catch 4xx response
            [] SIPP.receive(mw_Response_Base(mw_statusLine4xx, vc_callId, ?)) -> value v_response sender vc_sent_label {
                log("*** " & testcasename() & ": FAIL: Unexpected 4xx response received. ***");
                setverdict(fail);
                v_cSeq := valueof(v_response.msgHeader.cSeq);
                f_setHeadersOnReceiptOfResponse(v_response);
                LibSip_Steps.f_setHeadersACK();
                f_SendACK(m_ACK_Request_route(vc_requestUri, vc_callId, v_response.msgHeader.cSeq, vc_from, vc_to, vc_via, vc_route));
                action("Please de-register");
                f_IMS_awaitDeRegistration(p_to_user, p_qop);
                f_componentStop();
            }
            // catch 5xx response
            [] SIPP.receive(mw_Response_Base(mw_statusLine5xx, vc_callId, ?)) -> value v_response sender vc_sent_label {
                log("*** " & testcasename() & ": FAIL: Unexpected 5xx response received. ***");
                setverdict(fail);
                v_cSeq := valueof(v_response.msgHeader.cSeq);
                f_setHeadersOnReceiptOfResponse(v_response);
                LibSip_Steps.f_setHeadersACK();
                f_SendACK(m_ACK_Request_route(vc_requestUri, vc_callId, v_response.msgHeader.cSeq, vc_from, vc_to, vc_via, vc_route));
                action("Please de-register");
                f_IMS_awaitDeRegistration(p_to_user, p_qop);
                f_componentStop();
            }
            // catch invalid REGISTER
            [] SIPP.receive(mw_REGISTER_Request_Base) -> value v_register_request sender vc_sent_label {
                log("*** " & testcasename() & ": FAIL: Unexpected REGISTER received. ***");
                setverdict(fail);
                f_componentStop();
            }
            // any
            [] SIPP.receive {
                log("*** " & testcasename() & ": FAIL: Unexpected message received. ***");
                setverdict(fail);
                all timer.stop;
                action("Please de-register");
                f_IMS_awaitDeRegistration(p_to_user, p_qop);
                f_componentStop();
            }
        }

        /**
         * @desc Main default altstep to handle unexpected messages and timeout
         * @verdict fail for all unexpected branches
         */
        altstep a_altstep_AS(
        ) runs on SipComponent {
            var Request v_request;
            var REGISTER_Request v_register_request;
            var BYE_Request v_bye_request;
            var CANCEL_Request v_cancel_request;
            
            [] any timer.timeout {
                log("*** " & testcasename() & ": FAIL: Timeout while waiting for message. ***");
                setverdict(fail);
                all timer.stop;
            }
            // allow repeated INVITEs
            [vc_ignore_invite] SIPP.receive(mw_INVITE_Request_Base) {
                repeat;
            }
            // handle REGISTER requests
            [] SIPP.receive(mw_REGISTER_Request_Base) -> value v_register_request sender vc_sent_label {
                f_setHeadersOnReceiptOfREGISTER(v_register_request);
                // vc_contact := vc_request.msgHeader.contact;
                f_sendResponse(m_Response_Contact(c_statusLine200, vc_callId, vc_cSeq, vc_caller_From, vc_caller_To, vc_via, vc_contact));
                repeat;
            }
            // according to SIP chap.8.1.3.2
            [] SIPP.receive(mw_Response_Base(c_statusLine183, vc_callId, vc_cSeq)) {
                repeat;
            }
            // unexpected CANCEL is acknowledged to avoid retransmissions
            [] SIPP.receive(mw_CANCEL_Request_Base(?)) -> value v_cancel_request sender vc_sent_label {
                log("*** " & testcasename() & ": FAIL: Unexpected CANCEL message received. ***");
                setverdict(fail);
                f_setHeadersOnReceiptOfRequest(v_cancel_request);
                f_send200OK();
            }
            // unexpected BYE is acknowledged to avoid retransmissions
            [] SIPP.receive(mw_BYE_Request_Base(?)) -> value v_bye_request sender vc_sent_label {
                log("*** " & testcasename() & ": FAIL: Unexpected BYE message received. ***");
                setverdict(fail);
                f_setHeadersOnReceiptOfRequest(v_bye_request);
                f_send200OK();
            }
            [] SIPP.receive(mw_Response_Base(?, vc_callId, vc_cSeq)) -> value vc_response {
                log("*** " & testcasename() & ": FAIL: Unexpected response message in " & __SCOPE__ & " received. ***");
                setverdict(fail);
                repeat;
            }
            // any
            [] SIPP.receive {
                log("*** " & testcasename() & ": FAIL: Unexpected message received. ***");
                setverdict(fail);
                all timer.stop;
            }
        }
    }
} // module LibIms_Steps
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