realtimenetprots/sipfw/SIP/sipapi/src/SipImplementation.cpp
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     1 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
       
     2 // All rights reserved.
       
     3 // This component and the accompanying materials are made available
       
     4 // under the terms of "Eclipse Public License v1.0"
       
     5 // which accompanies this distribution, and is available
       
     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     7 //
       
     8 // Initial Contributors:
       
     9 // Nokia Corporation - initial contribution.
       
    10 //
       
    11 // Contributors:
       
    12 //
       
    13 // Description:
       
    14 // Name          : SIPImplementation.cpp
       
    15 // Part of       : SIP API
       
    16 // Version       : SIP/6.0 
       
    17 //
       
    18 
       
    19 
       
    20 
       
    21 #include "SipImplementation.h"
       
    22 #include "SipAssert.h"
       
    23 #include "sipclient.h"
       
    24 #include "sipobserver.h"
       
    25 #include "SipConnectionImplementation.h"
       
    26 #include "siphttpdigest.h"
       
    27 #include "unregistered.h"
       
    28 #include "registering.h"
       
    29 #include "registered.h"
       
    30 #include "unregistering.h"
       
    31 #include "sipdialogtrying.h"
       
    32 #include "sipdialogearly.h"
       
    33 #include "sipdialogconfirmed.h"
       
    34 #include "sipdialogterminated.h"
       
    35 #include "sipinviteclienttransaction.h"
       
    36 #include "sipclienttransaction.h"
       
    37 #include "sipservertransaction.h"
       
    38 #include "PendingTransaction.h"
       
    39 #include "siprequestelements.h"
       
    40 #include "sipresponseelements.h"
       
    41 #include "sipmessageelements.h"
       
    42 #include "siphttpdigestchallengeobserver2.h"
       
    43 #include "sipcseqheader.h"
       
    44 #include "sipauthheaderbase.h"
       
    45 #include "sipstrings.h"
       
    46 #include "sipstrconsts.h"
       
    47 
       
    48 
       
    49 #ifdef CPPUNIT_TEST
       
    50 
       
    51 #include "TestCleanupStack.h"
       
    52 
       
    53 #endif
       
    54 
       
    55 
       
    56 // -----------------------------------------------------------------------------
       
    57 // CSIPImplementation::NewL
       
    58 // -----------------------------------------------------------------------------
       
    59 //
       
    60 CSIPImplementation*
       
    61 CSIPImplementation::NewL(const TUid& aUid, MSIPObserver& aObserver)
       
    62 	{
       
    63 	CSIPImplementation* self = new (ELeave) CSIPImplementation(aObserver);
       
    64     CleanupStack::PushL(self);
       
    65     self->ConstructL(aUid);
       
    66     CleanupStack::Pop(self);
       
    67     return self;    
       
    68 	}
       
    69 
       
    70 // -----------------------------------------------------------------------------
       
    71 // CSIPImplementation::CSIPImplementation
       
    72 // -----------------------------------------------------------------------------
       
    73 //
       
    74 CSIPImplementation::CSIPImplementation(MSIPObserver& aObserver) :
       
    75     iSecurityHandlingEnabled(ETrue),
       
    76 	iObserver(aObserver)
       
    77 #ifdef CPPUNIT_TEST
       
    78     //For unit tests the granularity of arrays is set to 1 to cause them to
       
    79     //allocate memory every time an item is appended to array
       
    80     , iConnections(1),
       
    81     iPendingServerTransactions(1),
       
    82     iDigests(1)
       
    83 #endif
       
    84 	{
       
    85 	}
       
    86 
       
    87 // -----------------------------------------------------------------------------
       
    88 // CSIPImplementation::ConstructL
       
    89 // -----------------------------------------------------------------------------
       
    90 //
       
    91 void CSIPImplementation::ConstructL(const TUid& aUid)
       
    92 	{    
       
    93     iSIPClient = CSIPClient::NewL(aUid, *this);
       
    94 
       
    95     //Registration state machine
       
    96     iUnregistered = CUnregistered::NewL();
       
    97     iRegistering = CRegistering::NewL();
       
    98     iRegistered = CRegistered::NewL();
       
    99     iUnregistering = CUnregistering::NewL();
       
   100     
       
   101     iUnregistered->SetNeighbourStates(*iRegistering);
       
   102     iRegistering->SetNeighbourStates(*iRegistered, *iUnregistered);
       
   103     iRegistered->SetNeighbourStates(*iUnregistering, *iUnregistered);
       
   104     iUnregistering->SetNeighbourStates(*iRegistered, *iUnregistered);
       
   105 
       
   106 
       
   107     //Dialog state machine
       
   108     iDialogTrying = CDialogTrying::NewL();
       
   109     iDialogEarly = CDialogEarly::NewL();
       
   110     iDialogConfirmed = CDialogConfirmed::NewL();
       
   111     iDialogTerminated = CDialogTerminated::NewL();
       
   112 
       
   113     iDialogTrying->SetNeighbourStates(*iDialogEarly,
       
   114                                       *iDialogConfirmed,
       
   115                                       *iDialogTerminated);    
       
   116     iDialogEarly->SetNeighbourStates(*iDialogConfirmed,
       
   117                                      *iDialogTerminated);
       
   118     iDialogConfirmed->SetNeighbourStates(*iDialogTerminated);
       
   119 	}
       
   120 
       
   121 // -----------------------------------------------------------------------------
       
   122 // CSIPImplementation::~CSIPImplementation
       
   123 // -----------------------------------------------------------------------------
       
   124 //
       
   125 CSIPImplementation::~CSIPImplementation()
       
   126 	{
       
   127 	delete iSIPClient;
       
   128 
       
   129 	TInt i = 0;
       
   130 	for (i = 0; i < iPendingServerTransactions.Count(); i++)
       
   131         {
       
   132         iPendingServerTransactions[i]->Transaction()->Detach(*this);
       
   133         }
       
   134     iPendingServerTransactions.ResetAndDestroy();
       
   135 
       
   136     //Free the array, not the connection objects
       
   137     for (i = 0; i < iConnections.Count(); i++)
       
   138         {
       
   139         iConnections[i]->Implementation().CSIPDeleted();
       
   140         }
       
   141     iConnections.Reset();
       
   142 
       
   143     for (i = 0; i < iDigests.Count(); i++)
       
   144         {
       
   145         iDigests[i]->CSIPDeleted();
       
   146         }
       
   147     iDigests.Reset();
       
   148 
       
   149     delete iUnregistered;
       
   150     delete iRegistering;
       
   151     delete iRegistered;
       
   152     delete iUnregistering;
       
   153 
       
   154     delete iDialogTrying;
       
   155     delete iDialogEarly;
       
   156     delete iDialogConfirmed;
       
   157     delete iDialogTerminated;    
       
   158 	}
       
   159 
       
   160 // -----------------------------------------------------------------------------
       
   161 // CSIPImplementation::IncomingRequestL
       
   162 // Don't use __TEST_INVARIANT after using observer as application may've deleted
       
   163 // the CSIP within callback.
       
   164 // -----------------------------------------------------------------------------
       
   165 //
       
   166 void CSIPImplementation::IncomingRequestL(TUint32 aIapId,
       
   167                             			  CSIPRequestElements* aElements,
       
   168                             			  TUint32 aRequestId)
       
   169     {
       
   170     __TEST_INVARIANT;
       
   171     __SIP_ASSERT_LEAVE(aElements, KErrArgument);
       
   172 
       
   173     CSIPConnection* connection = Connection(aIapId);
       
   174     if (connection)
       
   175         {
       
   176         connection->Implementation().IncomingRequestL(aElements, aRequestId);        
       
   177         }
       
   178     else
       
   179         {
       
   180         CSIPServerTransaction* ta =
       
   181         	CSIPServerTransaction::NewLC(aRequestId, *this, aElements);
       
   182     	CleanupStack::PushL(
       
   183         	TCleanupItem(CSIPServerTransaction::DetachRequestElements, ta));
       
   184         CPendingTransaction* pendingTa = CPendingTransaction::NewLC(ta, aIapId);
       
   185 
       
   186         iPendingServerTransactions.AppendL(pendingTa);
       
   187         CleanupStack::Pop(3); //pendingTa, TCleanupItem, ta
       
   188 
       
   189         iObserver.IncomingRequest(aIapId, ta);
       
   190         }
       
   191     }
       
   192 
       
   193 // -----------------------------------------------------------------------------
       
   194 // CSIPImplementation::TimeOut
       
   195 // Do everything before calling iObserver.TimedOut() as application may delete
       
   196 // CSIP withing the callback.
       
   197 // -----------------------------------------------------------------------------
       
   198 //
       
   199 void CSIPImplementation::TimeOut(TUint32 aRequestId)
       
   200     {
       
   201     __TEST_INVARIANT;
       
   202 
       
   203     CPendingTransaction* ta = NULL;
       
   204     for (TInt i = 0; i < iPendingServerTransactions.Count(); i++)
       
   205         {
       
   206         ta = iPendingServerTransactions[i];
       
   207         __SIP_ASSERT_RETURN(ta && ta->Transaction(), KErrNotFound);
       
   208 
       
   209         if (ta->Transaction()->RequestId() == aRequestId)
       
   210             {
       
   211 			CSIPServerTransaction* timeOutedTa = ta->Transaction();
       
   212 			timeOutedTa->Detach(*this);
       
   213 			iPendingServerTransactions.Remove(i);
       
   214 			delete ta;
       
   215 			iObserver.TimedOut(*timeOutedTa);
       
   216 			return;
       
   217             }
       
   218         }
       
   219     __TEST_INVARIANT;
       
   220     }
       
   221 
       
   222 // -----------------------------------------------------------------------------
       
   223 // CSIPImplementation::ChallengeReceivedL
       
   224 // -----------------------------------------------------------------------------
       
   225 //
       
   226 void CSIPImplementation::ChallengeReceivedL(
       
   227     TUint32 aRequestId,
       
   228     CSIPResponseElements* aResponse,
       
   229     MSIPHttpDigestChallengeObserver2& aObserver)
       
   230     {
       
   231     __SIP_ASSERT_LEAVE(aResponse != NULL, KErrArgument);
       
   232 
       
   233 	CSIPClientTransaction* ta(NULL);
       
   234     for (TInt i = 0; i < iConnections.Count(); ++i)
       
   235         {
       
   236         ta = iConnections[i]->Implementation().FindClientTransaction(aRequestId);
       
   237         if (ta)
       
   238             {
       
   239 			// Transaction matches aRequestId, so it hasn't yet got response
       
   240             ta->SetResponseElements(aResponse);
       
   241             aObserver.ChallengeReceived(*ta);
       
   242             return;
       
   243             }
       
   244         }
       
   245 
       
   246 	// If dialog's trusted user is a non-refreshed registration and INVITE is
       
   247 	// challenged, INVITE transaction is not found, as ChallengeReceivedL() is
       
   248 	// called in registration's SIP client instance (dialog has another SIP
       
   249 	// client instance). Ignore the challenge, so it gets passed to dialog's
       
   250 	// SIP client.
       
   251 
       
   252 	// Only one CSIPHttpDigest instance can exist in iDigests
       
   253 	if (iDigests.Count() > 0)
       
   254 		{
       
   255 		ta = CreateTransactionL(aRequestId, aResponse, NULL);
       
   256 		IgnoreChallenges(*ta, *iDigests[0]);
       
   257 		delete ta;
       
   258 		}
       
   259 	else
       
   260 		{
       
   261 		delete aResponse;
       
   262 		}
       
   263     }
       
   264 
       
   265 // -----------------------------------------------------------------------------
       
   266 // CSIPImplementation::ChallengeReceivedInRefreshL
       
   267 // Profile sets credentials synchronously. If application sets them
       
   268 // asynchronously, update code to handle many simultaneous challenges.
       
   269 // E.g. dialog's trusted user is registration, both REGISTER and INVITE are
       
   270 // challenged at the same time with different realms.
       
   271 // -----------------------------------------------------------------------------
       
   272 //
       
   273 void CSIPImplementation::ChallengeReceivedInRefreshL(
       
   274     TUint32 aRefreshId,
       
   275     TUint32 aRequestId,
       
   276     CSIPResponseElements* aResponse,
       
   277     MSIPHttpDigestChallengeObserver2& aObserver)
       
   278     {
       
   279     __SIP_ASSERT_LEAVE(aResponse != NULL, KErrArgument);
       
   280     
       
   281     CSIPRefresh* refresh(NULL);
       
   282     for (TInt i = 0; i < iConnections.Count(); i++)
       
   283         {
       
   284         refresh = iConnections[i]->Implementation().FindRefresh(aRequestId,
       
   285         														aRefreshId);
       
   286         if (refresh)
       
   287             {
       
   288 		    refresh->SetRefreshIdIfEmpty(aRefreshId);
       
   289 	        refresh->UpdateRefreshState(aResponse->StatusCode());
       
   290 	        CSIPClientTransaction* ta = refresh->Transaction();
       
   291 			if (ta)
       
   292 				{
       
   293 				ta->SetResponseElements(aResponse);
       
   294                 aObserver.ChallengeReceived(*refresh);
       
   295 				}
       
   296 			else
       
   297 				{
       
   298 				ta = CreateTransactionL(aRequestId, aResponse, refresh);
       
   299                 aObserver.ChallengeReceived(*refresh);
       
   300 
       
   301 				// INVITE transaction doesn't point to refresh. Manually unlink
       
   302 				// transaction and refresh, instead of letting destructor do it
       
   303                 refresh->RemoveTransaction();
       
   304                 if (ta->Refresh())
       
   305                 	{
       
   306     				ta->RemoveRefresh();
       
   307                 	}
       
   308                 delete ta;
       
   309 				}
       
   310             return;
       
   311             }
       
   312         }
       
   313 	delete aResponse;
       
   314     }
       
   315 
       
   316 // -----------------------------------------------------------------------------
       
   317 // CSIPImplementation::SupportedSecurityMechanismsL
       
   318 // -----------------------------------------------------------------------------
       
   319 //
       
   320 CDesC8Array* CSIPImplementation::SupportedSecurityMechanismsL() const
       
   321     {
       
   322     __TEST_INVARIANT;
       
   323     return iSIPClient->SupportedSecurityMechanismsL();
       
   324     }
       
   325 
       
   326 // -----------------------------------------------------------------------------
       
   327 // CSIPImplementation::IsSigCompSupportedL
       
   328 // -----------------------------------------------------------------------------
       
   329 //
       
   330 TBool CSIPImplementation::IsSigCompSupportedL() const
       
   331     {
       
   332     __TEST_INVARIANT;
       
   333     return iSIPClient->IsSigCompSupportedL();
       
   334     }
       
   335 
       
   336 // -----------------------------------------------------------------------------
       
   337 // CSIPImplementation::NegotiatedSecurityMechanismL
       
   338 // -----------------------------------------------------------------------------
       
   339 //
       
   340 HBufC8*
       
   341 CSIPImplementation::NegotiatedSecurityMechanismL(const TDesC8& aHop) const
       
   342 	{
       
   343 	__TEST_INVARIANT;
       
   344     return iSIPClient->NegotiatedSecurityMechanismL(aHop);
       
   345 	}
       
   346 
       
   347 // -----------------------------------------------------------------------------
       
   348 // CSIPImplementation::Connection
       
   349 // -----------------------------------------------------------------------------
       
   350 //
       
   351 CSIPConnection* CSIPImplementation::Connection(TUint32 aIapId) const
       
   352     {
       
   353     __TEST_INVARIANT;
       
   354 
       
   355     for (TInt i = 0; i < iConnections.Count(); i++)
       
   356         {
       
   357         if (iConnections[i]->IapId() == aIapId)
       
   358             {
       
   359             return iConnections[i];
       
   360             }
       
   361         }
       
   362     return NULL;
       
   363 	}
       
   364 
       
   365 // -----------------------------------------------------------------------------
       
   366 // CSIPImplementation::SetSecurityHandlingL
       
   367 // -----------------------------------------------------------------------------
       
   368 //
       
   369 void CSIPImplementation::SetSecurityHandlingL(TBool aEnabled)
       
   370     {
       
   371     __TEST_INVARIANT;
       
   372     iSIPClient->SetSecurityHandlingL(aEnabled);
       
   373     iSecurityHandlingEnabled = aEnabled;
       
   374     }
       
   375 
       
   376 // -----------------------------------------------------------------------------
       
   377 // CSIPImplementation::IsSecurityHandlingEnabled
       
   378 // -----------------------------------------------------------------------------
       
   379 //
       
   380 TBool CSIPImplementation::IsSecurityHandlingEnabled() const
       
   381     {
       
   382     __TEST_INVARIANT;
       
   383     return iSecurityHandlingEnabled;
       
   384     }
       
   385 
       
   386 // -----------------------------------------------------------------------------
       
   387 // CSIPImplementation::CreateTransactionL
       
   388 // It doesn't matter what MTransactionAssociation is given to NewL.
       
   389 // -----------------------------------------------------------------------------
       
   390 //
       
   391 CSIPClientTransaction*
       
   392 CSIPImplementation::CreateTransactionL(TUint32 aRequestId,
       
   393 									   CSIPResponseElements* aResponse,
       
   394 									   CSIPRefresh* aRefresh)
       
   395 	{
       
   396 	__SIP_ASSERT_LEAVE(aResponse && aResponse->CSeqHeader(), KErrNotFound);
       
   397 
       
   398 	CSIPClientTransaction* ta(NULL);
       
   399 	RStringF method = aResponse->CSeqHeader()->Method();
       
   400 	if (method == SIPStrings::StringF(SipStrConsts::EInvite))
       
   401 		{
       
   402 		ta = CSIPInviteClientTransaction::NewL(*this);
       
   403 		if (aRefresh)
       
   404 			{
       
   405 			// Links refresh to INVITE transaction, but not the other way
       
   406 			aRefresh->AddTransaction(*ta);
       
   407 			}
       
   408 		}
       
   409 	else
       
   410 		{
       
   411 		ta = CSIPClientTransaction::NewL(method, *this, aRefresh);
       
   412 		}
       
   413     ta->SetRequestId(aRequestId);
       
   414     ta->SetResponseElements(aResponse);
       
   415     return ta;
       
   416 	}
       
   417 
       
   418 // -----------------------------------------------------------------------------
       
   419 // CSIPImplementation::IgnoreChallenges
       
   420 // -----------------------------------------------------------------------------
       
   421 //
       
   422 void
       
   423 CSIPImplementation::IgnoreChallenges( const CSIPClientTransaction& aTransaction,
       
   424         					   		  CSIPHttpDigest& aDigest )
       
   425 	{
       
   426 	const CSIPResponseElements* resp = aTransaction.ResponseElements();
       
   427 	if ( resp )
       
   428 		{
       
   429     	const RPointerArray<CSIPHeaderBase>& headers =
       
   430     		resp->MessageElements().UserHeaders();
       
   431 
       
   432 		RStringF wwwAuth =
       
   433 			SIPStrings::StringF(SipStrConsts::EWWWAuthenticateHeader);
       
   434 		RStringF proxyAuth =
       
   435 			SIPStrings::StringF(SipStrConsts::EProxyAuthenticateHeader);
       
   436 		RStringF realm = SIPStrings::StringF(SipStrConsts::ERealm);
       
   437 
       
   438 	    for (TInt i = 0; i < headers.Count(); ++i)
       
   439 	        {
       
   440 	        const CSIPHeaderBase* header = headers[i];
       
   441 	        if (header->Name() == wwwAuth || header->Name() == proxyAuth)
       
   442 	        	{
       
   443 	            const CSIPAuthHeaderBase* auth =
       
   444 	                static_cast<const CSIPAuthHeaderBase*>(header);
       
   445 	            aDigest.IgnoreChallenge(aTransaction,
       
   446 	            						auth->DesParamValue(realm));
       
   447 	            }
       
   448 	        }
       
   449 		}
       
   450 	}
       
   451         					   
       
   452 // -----------------------------------------------------------------------------
       
   453 // CSIPImplementation::SIPClient
       
   454 // -----------------------------------------------------------------------------
       
   455 //
       
   456 CSIPClient& CSIPImplementation::SIPClient()
       
   457     {
       
   458     __TEST_INVARIANT;
       
   459     return *iSIPClient;
       
   460     }
       
   461 
       
   462 // -----------------------------------------------------------------------------
       
   463 // CSIPImplementation::AddConnectionL
       
   464 // CSIPClient checks if a connection for the IAP-id already exists. No need to
       
   465 // do it here.
       
   466 //
       
   467 // Associate server transactions with the same IAP-id (aIapId), to aConnection.
       
   468 // Start search from the end of array, so if an item is removed, it doesn't
       
   469 // affect the position of items that haven't yet been checked.
       
   470 // -----------------------------------------------------------------------------
       
   471 //
       
   472 void CSIPImplementation::AddConnectionL(
       
   473 							CSIPConnectionImplementation& aConnImplementation,
       
   474 							TUint32 aIapId)
       
   475 	{
       
   476 	__TEST_INVARIANT;
       
   477 
       
   478 	CSIPConnection& conn = aConnImplementation.SIPConnectionL();    
       
   479     iConnections.AppendL(&conn);
       
   480 
       
   481     CPendingTransaction* ta(NULL);
       
   482     for (TInt i = iPendingServerTransactions.Count(); i > 0; i--)
       
   483         {
       
   484         ta = iPendingServerTransactions[i - 1];
       
   485         __SIP_ASSERT_LEAVE(ta, KErrNotFound);
       
   486 
       
   487         if (ta->IapId() == aIapId)
       
   488             {            
       
   489             ta->Transaction()->ReAssociateL(aConnImplementation);
       
   490             }
       
   491         }
       
   492     __TEST_INVARIANT;
       
   493     }
       
   494 
       
   495 // -----------------------------------------------------------------------------
       
   496 // CSIPImplementation::RemoveConnection
       
   497 // -----------------------------------------------------------------------------
       
   498 //
       
   499 void CSIPImplementation::RemoveConnection(const CSIPConnection& aConnection)
       
   500     {
       
   501     __TEST_INVARIANT;
       
   502 
       
   503     TInt pos = iConnections.Find(&aConnection);
       
   504     if (pos != KErrNotFound)
       
   505         {
       
   506         iConnections.Remove(pos);
       
   507         }
       
   508     __TEST_INVARIANT;
       
   509     }
       
   510 
       
   511 // -----------------------------------------------------------------------------
       
   512 // CSIPImplementation::RemoveConnection
       
   513 // -----------------------------------------------------------------------------
       
   514 //
       
   515 void CSIPImplementation::AddDigestL(CSIPHttpDigest& aDigest)
       
   516 	{
       
   517 	__TEST_INVARIANT;
       
   518 
       
   519     iDigests.AppendL(&aDigest);
       
   520 	}
       
   521 
       
   522 // -----------------------------------------------------------------------------
       
   523 // CSIPImplementation::RemoveDigest
       
   524 // -----------------------------------------------------------------------------
       
   525 //
       
   526 void CSIPImplementation::RemoveDigest(const CSIPHttpDigest& aDigest)
       
   527 	{
       
   528 	__TEST_INVARIANT;
       
   529 
       
   530 	TInt pos = iDigests.Find(&aDigest);
       
   531     if (pos != KErrNotFound)
       
   532         {
       
   533         iDigests.Remove(pos);
       
   534         }
       
   535     __TEST_INVARIANT;
       
   536     }
       
   537 
       
   538 // -----------------------------------------------------------------------------
       
   539 // CSIPImplementation::ClientConnectionL
       
   540 // CSIPImplementation doesn't know which CSIPClientConnection to return since
       
   541 // no IAP-id is passed as parameter.
       
   542 // -----------------------------------------------------------------------------
       
   543 //
       
   544 CSIPClientConnection& CSIPImplementation::ClientConnectionL()
       
   545     {
       
   546     __TEST_INVARIANT;
       
   547 
       
   548     User::Leave(KErrUnknown);    
       
   549     return *(CSIPClientConnection*)1;
       
   550     }
       
   551 
       
   552 // -----------------------------------------------------------------------------
       
   553 // CSIPImplementation::ClientConnection
       
   554 // CSIPImplementation doesn't know which CSIPClientConnection to return since
       
   555 // no IAP-id is passed as parameter.
       
   556 // -----------------------------------------------------------------------------
       
   557 //
       
   558 CSIPClientConnection* CSIPImplementation::ClientConnection()
       
   559     {
       
   560     __TEST_INVARIANT;
       
   561     return NULL;
       
   562     }
       
   563 
       
   564 // -----------------------------------------------------------------------------
       
   565 // CSIPImplementation::SIPConnectionL
       
   566 // CSIPImplementation doesn't know which CSIPConnection to return since no
       
   567 // IAP-id is passed as parameter.
       
   568 // -----------------------------------------------------------------------------
       
   569 //
       
   570 CSIPConnection& CSIPImplementation::SIPConnectionL()
       
   571     {
       
   572     __TEST_INVARIANT;
       
   573 
       
   574     User::Leave(KErrUnknown);
       
   575     return *(CSIPConnection*)1;
       
   576     }
       
   577 
       
   578 // -----------------------------------------------------------------------------
       
   579 // CSIPImplementation::AddTransactionL
       
   580 // -----------------------------------------------------------------------------
       
   581 //
       
   582 void CSIPImplementation::AddTransactionL(CSIPTransactionBase& /*aTransaction*/)
       
   583     {
       
   584     // No action    
       
   585     }
       
   586 
       
   587 // -----------------------------------------------------------------------------
       
   588 // CSIPImplementation::RemoveTransaction
       
   589 // -----------------------------------------------------------------------------
       
   590 //
       
   591 void
       
   592 CSIPImplementation::RemoveTransaction(const CSIPTransactionBase& aTransaction)
       
   593     {
       
   594     __TEST_INVARIANT;
       
   595 
       
   596     CPendingTransaction* ta(NULL);
       
   597     for (TInt i = 0; i < iPendingServerTransactions.Count(); i++)
       
   598         {
       
   599         ta = iPendingServerTransactions[i];
       
   600         __SIP_ASSERT_RETURN(ta && ta->Transaction(), KErrNotFound);
       
   601 
       
   602         if (ta->Transaction() == &aTransaction)
       
   603             {
       
   604             iPendingServerTransactions.Remove(i);
       
   605             delete ta;
       
   606             return;
       
   607             }
       
   608         }
       
   609     __TEST_INVARIANT;
       
   610     }
       
   611 
       
   612 // -----------------------------------------------------------------------------
       
   613 // CSIPImplementation::InitialRegisterState
       
   614 // -----------------------------------------------------------------------------
       
   615 //
       
   616 CRegistrationState* CSIPImplementation::InitialRegisterState()
       
   617     {
       
   618     __TEST_INVARIANT;
       
   619     return iUnregistered;
       
   620     }
       
   621 
       
   622 // -----------------------------------------------------------------------------
       
   623 // CSIPImplementation::InitialDialogState
       
   624 // -----------------------------------------------------------------------------
       
   625 //
       
   626 CDialogState* CSIPImplementation::InitialDialogState()
       
   627     {
       
   628     __TEST_INVARIANT;
       
   629     return iDialogTrying;
       
   630     }
       
   631 
       
   632 // -----------------------------------------------------------------------------
       
   633 // CSIPImplementation::__DbgTestInvariant
       
   634 // -----------------------------------------------------------------------------
       
   635 //
       
   636 
       
   637 
       
   638 void CSIPImplementation::__DbgTestInvariant() const
       
   639 	{
       
   640 	if (!iSIPClient ||
       
   641 		!iUnregistered || !iRegistering || !iRegistered || !iUnregistering ||
       
   642 		!iDialogTrying || !iDialogEarly || !iDialogConfirmed ||
       
   643 		!iDialogTerminated)
       
   644 		{		
       
   645 		User::Invariant();
       
   646 		}
       
   647 	}