public void B2BOptionsStatefulProxyTest() { SIPTransactionEngine transactionEngine1 = new SIPTransactionEngine(); SIPTransport sipTransport1 = new SIPTransport(SIPDNSManager.Resolve, transactionEngine1, true, false); sipTransport1.AddSIPChannel(new SIPUDPChannel(new IPEndPoint(IPAddress.Loopback, 3000))); SIPAppServerCore appServerCore1 = new SIPAppServerCore(sipTransport1, null, statefulProxyCore1_StatefulProxyLogEvent, null, null, null); SIPTransactionEngine transactionEngine2 = new SIPTransactionEngine(); SIPTransport sipTransport2 = new SIPTransport(SIPDNSManager.Resolve, transactionEngine2, true, false); sipTransport2.AddSIPChannel(new SIPUDPChannel(new IPEndPoint(IPAddress.Loopback, 3001))); SIPAppServerCore appServerCore2 = new SIPAppServerCore(sipTransport2, null, statefulProxyCore2_StatefulProxyLogEvent, null, null, null); sipTransport1.SIPRequestOutTraceEvent += sipTransport1_SIPRequestOutTraceEvent; sipTransport1.SIPResponseInTraceEvent += sipTransport1_SIPResponseInTraceEvent; sipTransport2.SIPRequestInTraceEvent += sipTransport2_SIPRequestInTraceEvent; SIPRequest optionsRequest = GetOptionsRequest(SIPURI.ParseSIPURI("sip:127.0.0.1:3001"), 1, sipTransport1.GetDefaultTransportContact(SIPProtocolsEnum.udp).SocketEndPoint); sipTransport1.SendRequest(optionsRequest); Thread.Sleep(200); // Check the NUnit Console.Out to make sure there are SIP requests and responses being displayed. sipTransport1.Shutdown(); sipTransport2.Shutdown(); }
public void B2BInviteTransactionStatefulProxyTest() { SIPTransactionEngine transactionEngine1 = new SIPTransactionEngine(); SIPTransport sipTransport1 = new SIPTransport(SIPDNSManager.Resolve, transactionEngine1, true, false); IPEndPoint sipTransport1EndPoint = new IPEndPoint(IPAddress.Loopback, 3000); sipTransport1.AddSIPChannel(new SIPUDPChannel(sipTransport1EndPoint)); SIPAppServerCore statefulProxyCore1 = new SIPAppServerCore(sipTransport1, null, statefulProxyCore1_StatefulProxyLogEvent, null, null, null); SIPTransactionEngine transactionEngine2 = new SIPTransactionEngine(); SIPTransport sipTransport2 = new SIPTransport(SIPDNSManager.Resolve, transactionEngine2, true, false); IPEndPoint sipTransport2EndPoint = new IPEndPoint(IPAddress.Loopback, 3001); sipTransport2.AddSIPChannel(new SIPUDPChannel(sipTransport2EndPoint)); SIPAppServerCore statefulProxyCore2 = new SIPAppServerCore(sipTransport2, statefulProxyCore2_GetCanonicalDomain, statefulProxyCore2_StatefulProxyLogEvent, null, null, null); sipTransport1.SIPRequestOutTraceEvent += sipTransport1_SIPRequestOutTraceEvent; sipTransport1.SIPResponseInTraceEvent += sipTransport1_SIPResponseInTraceEvent; sipTransport2.SIPRequestInTraceEvent += sipTransport2_SIPRequestInTraceEvent; sipTransport2.SIPResponseOutTraceEvent += sipTransport2_SIPResponseOutTraceEvent; SIPRequest inviteRequest = GetInviteRequest(sipTransport1EndPoint, null, sipTransport2EndPoint); UACInviteTransaction uacInvite = sipTransport1.CreateUACTransaction(inviteRequest, new SIPEndPoint(SIPProtocolsEnum.udp, sipTransport2EndPoint), new SIPEndPoint(SIPProtocolsEnum.udp, sipTransport1EndPoint), null); uacInvite.SendInviteRequest(new SIPEndPoint(SIPProtocolsEnum.udp, sipTransport2EndPoint), inviteRequest); Thread.Sleep(200); // Check the NUnit Console.Out to make sure there are SIP requests and responses being displayed. sipTransport1.Shutdown(); sipTransport2.Shutdown(); }
public void MatchOnRequestAndResponseTest() { SIPTransactionEngine transactionEngine = new SIPTransactionEngine(); SIPEndPoint dummySIPEndPoint = new SIPEndPoint(new IPEndPoint(IPAddress.Loopback, 1234)); SIPRequest inviteRequest = SIPRequest.ParseSIPRequest("INVITE sip:dummy@udp:127.0.0.1:12014 SIP/2.0" + m_CRLF + "Via: SIP/2.0/UDP 127.0.0.1:1234;branch=z9hG4bK5f37455955ca433a902f8fea0ce2dc27" + m_CRLF + "To: <sip:dummy@udp:127.0.0.1:12014>" + m_CRLF + "From: <sip:[email protected]>;tag=2062917371" + m_CRLF + "Call-ID: 8ae45c15425040179a4285d774ccbaf6" + m_CRLF + "CSeq: 1 INVITE" + m_CRLF + "Contact: <sip:127.0.0.1:1234>" + m_CRLF + "Max-Forwards: 70" + m_CRLF + "User-Agent: unittest" + m_CRLF + "Content-Length: 5" + m_CRLF + "Content-Type: application/sdp" + m_CRLF + m_CRLF + "dummy"); SIPTransaction transaction = new UACInviteTransaction(new SIPTransport(MockSIPDNSManager.Resolve, null), inviteRequest, dummySIPEndPoint, dummySIPEndPoint, null); transactionEngine.AddTransaction(transaction); SIPResponse sipResponse = SIPResponse.ParseSIPResponse("SIP/2.0 603 Nothing listening" + m_CRLF + "Via: SIP/2.0/UDP 127.0.0.1:1234;branch=z9hG4bK5f37455955ca433a902f8fea0ce2dc27;rport=12013" + m_CRLF + "To: <sip:dummy@udp:127.0.0.1:12014>" + m_CRLF + "From: <sip:[email protected]>;tag=2062917371" + m_CRLF + "Call-ID: 8ae45c15425040179a4285d774ccbaf6" + m_CRLF + "CSeq: 1 INVITE" + m_CRLF + "Content-Length: 0" + m_CRLF + m_CRLF); Assert.IsNotNull(transactionEngine.GetTransaction(sipResponse), "Transaction should have matched, check the hashing mechanism."); }
public void CreateStatefulProxyTest() { SIPTransactionEngine transactionEngine = new SIPTransactionEngine(); SIPTransport sipTransport = new SIPTransport(SIPDNSManager.Resolve, transactionEngine, new SIPUDPChannel(new IPEndPoint(IPAddress.Loopback, 3000)), false, false); SIPAppServerCore appServerCore = new SIPAppServerCore(sipTransport, null, null, null, null, null); sipTransport.Shutdown(); }
public void AckRecognitionUnitTest() { SIPTransport clientTransport = null; SIPTransport serverTransport = null; try { SIPTransactionEngine clientEngine = new SIPTransactionEngine(); // Client side of the INVITE. SIPEndPoint clientEndPoint = new SIPEndPoint(SIPProtocolsEnum.udp, new IPEndPoint(IPAddress.Loopback, 12013)); clientTransport = new SIPTransport(MockSIPDNSManager.Resolve, clientEngine, new SIPUDPChannel(clientEndPoint.GetIPEndPoint()), false); SetTransportTraceEvents(clientTransport); SIPTransactionEngine serverEngine = new SIPTransactionEngine(); // Server side of the INVITE. UASInviteTransaction serverTransaction = null; SIPEndPoint serverEndPoint = new SIPEndPoint(new IPEndPoint(IPAddress.Loopback, 12014)); serverTransport = new SIPTransport(MockSIPDNSManager.Resolve, serverEngine, new SIPUDPChannel(serverEndPoint.GetIPEndPoint()), false); SetTransportTraceEvents(serverTransport); serverTransport.SIPTransportRequestReceived += (localEndPoint, remoteEndPoint, sipRequest) => { Console.WriteLine("Server Transport Request In: " + sipRequest.Method + "."); serverTransaction = serverTransport.CreateUASTransaction(sipRequest, remoteEndPoint, localEndPoint, null); SetTransactionTraceEvents(serverTransaction); serverTransaction.GotRequest(localEndPoint, remoteEndPoint, sipRequest); }; SIPURI dummyURI = SIPURI.ParseSIPURI("sip:dummy@" + serverEndPoint); SIPRequest inviteRequest = GetDummyINVITERequest(dummyURI); inviteRequest.LocalSIPEndPoint = clientTransport.GetDefaultTransportContact(SIPProtocolsEnum.udp); // Send the invite to the server side. UACInviteTransaction clientTransaction = new UACInviteTransaction(clientTransport, inviteRequest, serverEndPoint, clientEndPoint, null); SetTransactionTraceEvents(clientTransaction); clientEngine.AddTransaction(clientTransaction); clientTransaction.SendInviteRequest(serverEndPoint, inviteRequest); Thread.Sleep(500); Assert.IsTrue(clientTransaction.TransactionState == SIPTransactionStatesEnum.Completed, "Client transaction in incorrect state."); Assert.IsTrue(serverTransaction.TransactionState == SIPTransactionStatesEnum.Confirmed, "Server transaction in incorrect state."); } finally { if (clientTransport != null) { clientTransport.Shutdown(); } if (serverTransport != null) { serverTransport.Shutdown(); } } }
public void CreateTransactionUnitTest() { logger.LogDebug("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name); logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name); string sipRequestStr = "INVITE sip:[email protected];switchtag=902888 SIP/2.0" + m_CRLF + "Record-Route: <sip:2.3.4.5;ftag=9307C640-33C;lr=on>" + m_CRLF + "Via: SIP/2.0/UDP 5.6.7.2:5060" + m_CRLF + "Via: SIP/2.0/UDP 1.2.3.4;branch=z9hG4bKa7ac.2bfad091.0" + m_CRLF + "From: \"unknown\" <sip:00.000.00.0>;tag=9307C640-33C" + m_CRLF + "To: <sip:[email protected]>" + m_CRLF + "Date: Thu, 21 Feb 2008 01:46:30 GMT" + m_CRLF + "Call-ID: A8706191-DF5511DC-B886ED7B-395C3F7E" + m_CRLF + "Supported: timer,100rel" + m_CRLF + "Min-SE: 1800" + m_CRLF + "Cisco-Guid: 2825897321-3746894300-3095653755-962346878" + m_CRLF + "User-Agent: Cisco-SIPGateway/IOS-12.x" + m_CRLF + "Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO" + m_CRLF + "CSeq: 101 INVITE" + m_CRLF + "Max-Forwards: 5" + m_CRLF + "Timestamp: 1203558390" + m_CRLF + "Contact: <sip:1.2.3.4:5060>" + m_CRLF + "Expires: 180" + m_CRLF + "Allow-Events: telephone-event" + m_CRLF + "Content-Type: application/sdp" + m_CRLF + "Content-Length: 370" + m_CRLF + m_CRLF + "v=0" + m_CRLF + "o=CiscoSystemsSIP-GW-UserAgent 9312 7567 IN IP4 00.00.00.0" + m_CRLF + "s=SIP Call" + m_CRLF + "c=IN IP4 00.000.00.0" + m_CRLF + "t=0 0" + m_CRLF + "m=audio 16434 RTP/AVP 8 0 4 18 3 101" + m_CRLF + "c=IN IP4 00.000.00.0" + m_CRLF + "a=rtpmap:8 PCMA/8000" + m_CRLF + "a=rtpmap:0 PCMU/8000" + m_CRLF + "a=rtpmap:4 G723/8000" + m_CRLF + "a=fmtp:4 annexa=no" + m_CRLF + "a=rtpmap:18 G729/8000" + m_CRLF + "a=fmtp:18 annexb=no" + m_CRLF + "a=rtpmap:3 GSM/8000" + m_CRLF + "a=rtpmap:101 telepho"; SIPRequest request = SIPRequest.ParseSIPRequest(sipRequestStr); SIPTransport sipTransport = new SIPTransport(false, SIPSorcery.UnitTests.MockSIPDNSManager.Resolve); SIPTransactionEngine transactionEngine = sipTransport.m_transactionEngine; SIPEndPoint dummySIPEndPoint = new SIPEndPoint(new IPEndPoint(IPAddress.Loopback, 1234)); SIPTransaction transaction = new UACInviteTransaction(sipTransport, request, null); Assert.True(transaction.TransactionRequest.URI.ToString() == "sip:[email protected];switchtag=902888", "Transaction request URI was incorrect."); }
public void DuplicateTransactionUnitTest() { SIPTransactionEngine clientEngine = new SIPTransactionEngine(); SIPURI dummyURI = SIPURI.ParseSIPURI("sip:[email protected]"); SIPRequest inviteRequest = GetDummyINVITERequest(dummyURI); SIPEndPoint dummySIPEndPoint = new SIPEndPoint(new IPEndPoint(IPAddress.Loopback, 1234)); UACInviteTransaction clientTransaction = new UACInviteTransaction(new SIPTransport(MockSIPDNSManager.Resolve, null), inviteRequest, dummySIPEndPoint, dummySIPEndPoint, null); clientEngine.AddTransaction(clientTransaction); clientEngine.AddTransaction(clientTransaction); }
private DialPlanLineContext GetDummyDialPlanContext(string testDialPlan, string dst) { SIPDialPlan dialPlan = new SIPDialPlan(null, null, null, testDialPlan, SIPDialPlanScriptTypesEnum.Asterisk); SIPTransactionEngine transactionEngine = new SIPTransactionEngine(); SIPTransport sipTransport = new SIPTransport(MockSIPDNSManager.Resolve, transactionEngine); SIPURI dummyURI = SIPURI.ParseSIPURI(dst); SIPRequest inviteRequest = GetDummyINVITERequest(dummyURI); SIPEndPoint dummyEndPoint = SIPEndPoint.ParseSIPEndPoint("udp:0.0.0.0:5060"); UASInviteTransaction uasTransaction = sipTransport.CreateUASTransaction(inviteRequest, dummyEndPoint, dummyEndPoint, null); SIPServerUserAgent uas = new SIPServerUserAgent(sipTransport, null, "test", "sipsorcery.com", SIPCallDirection.In, null, null, null, uasTransaction); DialPlanLineContext dialPlanContext = new DialPlanLineContext(null, null, null, null, uas, dialPlan, null, null, null, null); return(dialPlanContext); }
public void AckRecognitionIIUnitTest() { logger.LogDebug("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name); logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name); SIPTransport sipTransport = new SIPTransport(); SIPTransactionEngine engine = sipTransport.m_transactionEngine; // Client side of the INVITE. string inviteRequestStr = "INVITE sip:[email protected] SIP/2.0" + m_CRLF + "Via: SIP/2.0/UDP 192.168.1.2:5065;rport;branch=z9hG4bKFBB7EAC06934405182D13950BD51F001" + m_CRLF + "From: SER Test X <sip:[email protected]:5065>;tag=196468136" + m_CRLF + "To: <sip:[email protected]>" + m_CRLF + "Contact: <sip:[email protected]:5065>" + m_CRLF + "Call-ID: [email protected]" + m_CRLF + "CSeq: 49429 INVITE" + m_CRLF + "Max-Forwards: 70" + m_CRLF + "Content-Type: application/sdp" + m_CRLF + "User-Agent: Dummy" + m_CRLF + m_CRLF; SIPRequest inviteRequest = SIPRequest.ParseSIPRequest(inviteRequestStr); // Server has received the invite. SIPEndPoint dummySIPEndPoint = new SIPEndPoint(new IPEndPoint(IPAddress.Loopback, 1234)); UASInviteTransaction serverTransaction = new UASInviteTransaction(sipTransport, inviteRequest, null, true); engine.AddTransaction(serverTransaction); string ackRequestStr = "ACK sip:[email protected] SIP/2.0" + m_CRLF + "Via: SIP/2.0/UDP 192.168.1.2:5065;rport;branch=z9hG4bKFBB7EAC06934405182D13950BD51F001" + m_CRLF + "From: SER Test X <sip:[email protected]:5065>;tag=196468136" + m_CRLF + "To: <sip:[email protected]>" + m_CRLF + "Contact: <sip:[email protected]:5065>" + m_CRLF + "Call-ID: [email protected]" + m_CRLF + "CSeq: 49429 ACK" + m_CRLF + "Max-Forwards: 70" + m_CRLF + "User-Agent: Dummy" + m_CRLF + m_CRLF; SIPRequest ackRequest = SIPRequest.ParseSIPRequest(ackRequestStr); SIPTransaction matchingTransaction = engine.GetTransaction(ackRequest); Assert.True(matchingTransaction.TransactionId == serverTransaction.TransactionId, "ACK transaction did not match INVITE transaction."); }
public void AckRecognitionIIUnitTest() { SIPTransactionEngine engine = new SIPTransactionEngine(); // Client side of the INVITE. string inviteRequestStr = "INVITE sip:[email protected] SIP/2.0" + m_CRLF + "Via: SIP/2.0/UDP 192.168.1.2:5065;rport;branch=z9hG4bKFBB7EAC06934405182D13950BD51F001" + m_CRLF + "From: SER Test X <sip:[email protected]:5065>;tag=196468136" + m_CRLF + "To: <sip:[email protected]>" + m_CRLF + "Contact: <sip:[email protected]:5065>" + m_CRLF + "Call-ID: [email protected]" + m_CRLF + "CSeq: 49429 INVITE" + m_CRLF + "Max-Forwards: 70" + m_CRLF + "Content-Type: application/sdp" + m_CRLF + "User-Agent: Dummy" + m_CRLF + m_CRLF; SIPRequest inviteRequest = SIPRequest.ParseSIPRequest(inviteRequestStr); // Server has received the invite. SIPEndPoint dummySIPEndPoint = new SIPEndPoint(new IPEndPoint(IPAddress.Loopback, 1234)); UASInviteTransaction serverTransaction = new UASInviteTransaction(new SIPTransport(MockSIPDNSManager.Resolve, null), inviteRequest, dummySIPEndPoint, dummySIPEndPoint, null, IPAddress.Loopback, true); engine.AddTransaction(serverTransaction); //SIPResponse errorResponse = SIPTransport.GetResponse(inviteRequest.Header, SIPResponseStatusCodesEnum.Decline, "Unit Test", null, null); string ackRequestStr = "ACK sip:[email protected] SIP/2.0" + m_CRLF + "Via: SIP/2.0/UDP 192.168.1.2:5065;rport;branch=z9hG4bKFBB7EAC06934405182D13950BD51F001" + m_CRLF + "From: SER Test X <sip:[email protected]:5065>;tag=196468136" + m_CRLF + "To: <sip:[email protected]>" + m_CRLF + "Contact: <sip:[email protected]:5065>" + m_CRLF + "Call-ID: [email protected]" + m_CRLF + "CSeq: 49429 ACK" + m_CRLF + "Max-Forwards: 70" + m_CRLF + "User-Agent: Dummy" + m_CRLF + m_CRLF; SIPRequest ackRequest = SIPRequest.ParseSIPRequest(ackRequestStr); SIPTransaction matchingTransaction = engine.GetTransaction(ackRequest); Assert.IsTrue(matchingTransaction.TransactionId == serverTransaction.TransactionId, "ACK transaction did not match INVITE transaction."); }
public void MatchOnRequestAndResponseTest() { logger.LogDebug("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name); logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name); SIPTransport sipTransport = new SIPTransport(); SIPTransactionEngine transactionEngine = sipTransport.m_transactionEngine; SIPRequest inviteRequest = SIPRequest.ParseSIPRequest("INVITE sip:[email protected]:12014 SIP/2.0" + m_CRLF + "Via: SIP/2.0/UDP 127.0.0.1:1234;branch=z9hG4bK5f37455955ca433a902f8fea0ce2dc27" + m_CRLF + "To: <sip:[email protected]:12014>" + m_CRLF + "From: <sip:[email protected]>;tag=2062917371" + m_CRLF + "Call-ID: 8ae45c15425040179a4285d774ccbaf6" + m_CRLF + "CSeq: 1 INVITE" + m_CRLF + "Contact: <sip:127.0.0.1:1234>" + m_CRLF + "Max-Forwards: 70" + m_CRLF + "User-Agent: unittest" + m_CRLF + "Content-Length: 5" + m_CRLF + "Content-Type: application/sdp" + m_CRLF + m_CRLF + "dummy"); SIPTransaction tx = new UACInviteTransaction(sipTransport, inviteRequest, null); transactionEngine.AddTransaction(tx); SIPResponse sipResponse = SIPResponse.ParseSIPResponse("SIP/2.0 603 Nothing listening" + m_CRLF + "Via: SIP/2.0/UDP 127.0.0.1:1234;branch=z9hG4bK5f37455955ca433a902f8fea0ce2dc27;rport=12013" + m_CRLF + "To: <sip:[email protected]:12014>" + m_CRLF + "From: <sip:[email protected]>;tag=2062917371" + m_CRLF + "Call-ID: 8ae45c15425040179a4285d774ccbaf6" + m_CRLF + "CSeq: 1 INVITE" + m_CRLF + "Content-Length: 0" + m_CRLF + m_CRLF); Assert.True(transactionEngine.GetTransaction(sipResponse) != null, "Transaction should have matched, check the hashing mechanism."); }
public void AckRecognitionUnitTest() { logger.LogDebug("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name); logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name); SIPTransport clientTransport = null; SIPTransport serverTransport = null; try { TaskCompletionSource <bool> uasConfirmedTask = new TaskCompletionSource <bool>(TaskCreationOptions.RunContinuationsAsynchronously); // Client side of the call. clientTransport = new SIPTransport(); clientTransport.AddSIPChannel(new SIPUDPChannel(new IPEndPoint(IPAddress.Loopback, 0))); var clientEngine = clientTransport.m_transactionEngine; SetTransportTraceEvents(clientTransport); // Server side of the call. UASInviteTransaction serverTransaction = null; serverTransport = new SIPTransport(); serverTransport.AddSIPChannel(new SIPUDPChannel(new IPEndPoint(IPAddress.Loopback, 0))); SIPTransactionEngine serverEngine = serverTransport.m_transactionEngine; SetTransportTraceEvents(serverTransport); serverTransport.SIPTransportRequestReceived += (localEndPoint, remoteEndPoint, sipRequest) => { logger.LogDebug("Server Transport Request In: " + sipRequest.Method + "."); serverTransaction = new UASInviteTransaction(serverTransport, sipRequest, null); SetTransactionTraceEvents(serverTransaction); serverTransaction.NewCallReceived += (lep, rep, sipTransaction, newCallRequest) => { logger.LogDebug("Server new call received."); var busyResponse = SIPResponse.GetResponse(newCallRequest, SIPResponseStatusCodesEnum.BusyHere, null); (sipTransaction as UASInviteTransaction).SendFinalResponse(busyResponse); return(Task.FromResult(SocketError.Success)); }; serverTransaction.TransactionStateChanged += (tx) => { if (tx.TransactionState == SIPTransactionStatesEnum.Confirmed) { if (!uasConfirmedTask.TrySetResult(true)) { logger.LogWarning($"AckRecognitionUnitTest: FAILED to set result on CompletionSource."); } } }; serverTransaction.GotRequest(localEndPoint, remoteEndPoint, sipRequest); return(Task.FromResult(0)); }; SIPURI dummyURI = new SIPURI("dummy", serverTransport.GetSIPChannels().First().ListeningEndPoint.ToString(), null, SIPSchemesEnum.sip); SIPRequest inviteRequest = GetDummyINVITERequest(dummyURI); // Send the invite to the server side. UACInviteTransaction clientTransaction = new UACInviteTransaction(clientTransport, inviteRequest, null); SetTransactionTraceEvents(clientTransaction); clientEngine.AddTransaction(clientTransaction); clientTransaction.SendInviteRequest(); if (!uasConfirmedTask.Task.Wait(TRANSACTION_EXCHANGE_TIMEOUT_MS)) { logger.LogWarning($"Tasks timed out"); } Assert.True(clientTransaction.TransactionState == SIPTransactionStatesEnum.Confirmed, "Client transaction in incorrect state."); Assert.True(serverTransaction.TransactionState == SIPTransactionStatesEnum.Confirmed, "Server transaction in incorrect state."); } finally { clientTransport.Shutdown(); serverTransport.Shutdown(); } }