// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// Name        : sipimsconnectioncontext.cpp

// Part of     : sip ims connection context

// implementation

// Version     : 1.0

//

// INCLUDE FILES

#include    <in_sock.h>

#include    "sipimsconnectioncontext.h"

#include	"sipmessageelements.h"

#include	"sipregistrationbinding.h"

#include	"sipconnection.h"

#include	"sipclienttransaction.h"

#include	"siprefresh.h"

#include	"sipimsprofilecontext.h"

#include	"sipprofileagent.h"

#include	"sipconcreteprofile.h"

#include	"SipProfileLog.h"

#include	"CSIPProxyResolver.h"

#include 	"sipgendefs.h"

#include    <siperr.h>

#include    <sipresponseelements.h>

#include    <sip.h>

#include    <siphttpdigest.h>

#include    <sipprofile.h>

const TInt KMaxIPAddressLength = 256;

// ============================ MEMBER FUNCTIONS ===============================

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::NewLC

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

CSIPIMSConnectionContext* CSIPIMSConnectionContext::NewLC()

	{

	CSIPIMSConnectionContext* self =

		new (ELeave) CSIPIMSConnectionContext();

	CleanupStack::PushL(self);

	self->ConstructL();

	return self;

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::NewL

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

CSIPIMSConnectionContext* CSIPIMSConnectionContext::NewL()

	{

	CSIPIMSConnectionContext* self = 

		CSIPIMSConnectionContext::NewLC();

	CleanupStack::Pop(self);

	return self;

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::CSIPIMSConnectionContext

// C++ default constructor can NOT contain any code, that

// might leave.

// -----------------------------------------------------------------------------

//

CSIPIMSConnectionContext::CSIPIMSConnectionContext()

 : iPreviousConnectionState(CSIPConnection::EInit)

	{

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::ConstructL

// Symbian 2nd phase constructor can leave.

// -----------------------------------------------------------------------------

//

void CSIPIMSConnectionContext::ConstructL()

    {

    iLocalIP = HBufC8::NewL(KMaxIPAddressLength);

    }

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::~CSIPIMSConnectionContext

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

CSIPIMSConnectionContext::~CSIPIMSConnectionContext()

	{

	iContexts.ResetAndDestroy();

	delete iProxyResolver;

	delete iConnection;

	delete iLocalIP;

	iUsers.Reset();

	iUsers.Close();

    delete iSipHttpDigest;

    delete iSip;

	}	

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::SetConnectionL

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

void CSIPIMSConnectionContext::SetConnectionL(CSIPConnection* aConnection)

	{

	__ASSERT_ALWAYS(aConnection != NULL, User::Leave(KErrArgument));

	if (aConnection->State() == CSIPConnection::EActive)

	    {

	    RefreshLocalIPAddressL(*aConnection);

	    }

	iConnection = aConnection;

	iPreviousConnectionState = iConnection->State();

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::Connection

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

CSIPConnection* CSIPIMSConnectionContext::Connection()

	{

	return iConnection;

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::IsIdle

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

TBool CSIPIMSConnectionContext::IsIdle() const

	{

	return (iContexts.Count()==0);

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::FindContext

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

CSIPIMSProfileContext* 

	CSIPIMSConnectionContext::FindContext(TUint32 aProfileId)

	{

	CSIPIMSProfileContext* context = 0;

	TBool found = EFalse;

	for (TInt i=0; i<iContexts.Count() && !found; i++)

		{

		if (iContexts[i]->Profile() && iContexts[i]->Profile()->Id() == aProfileId)

			{

			context = iContexts[i];

			found = ETrue;

			}

		}

	return context;

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::IsIPSecAlreadyInUseL

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

TBool CSIPIMSConnectionContext::IsIPSecAlreadyInUse(TBool& aRegisterInProgress)

	{

	_LIT8(KSIPIpSec3gpp, "ipsec-3gpp");

	TBool ipSecInUse = EFalse;

	for (TInt i=0; i<iContexts.Count(); i++)

		{

		if (iContexts[i]->Profile() && 

		    iContexts[i]->Profile()->IsSecurityNegotiationEnabled() )

			{

			if (iContexts[i]->Profile()->NegotiatedSecurityMechanism() == KSIPIpSec3gpp)

				{

				ipSecInUse = ETrue;

				}

			if (iContexts[i]->Profile()->Status() == CSIPConcreteProfile::ERegistrationInProgress &&

				!CSIPIMSProfileContext::IsHttpDigestSettingsConfigured(*iContexts[i]->Profile()))

				{

				aRegisterInProgress = ETrue;

				}

			}

		}

	return ipSecInUse;

	}	

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::IsIPSecInUseL

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

TUint32 CSIPIMSConnectionContext::IsIPSecInUse()

	{

	for (TInt i=0; i<iContexts.Count(); i++)

		{

		if ( iContexts[i]->ConfiguredType() == 

									CSIPIMSProfileContext::EIMSReleaseType )

			{

			return iContexts[i]->Profile()->Id();

			}

		}

	return 0;

	}	

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::AddProfileContextL

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

void 

CSIPIMSConnectionContext::AddProfileContextL(CSIPIMSProfileContext* aContext)

	{

	__ASSERT_DEBUG(aContext->Connection().IapId()==iConnection->IapId(),

															 User::Invariant());

	User::LeaveIfError(iContexts.Append(aContext));

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::CleanIdleContexts

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

void CSIPIMSConnectionContext::CleanIdleContexts()

	{

	CSIPIMSProfileContext* context = 0;

	for (TInt i= iContexts.Count()-1; i >= 0;i--)

		{

		if (iContexts[i]->CurrentState() == MSIPProfileContext::EInit &&

		    iContexts[i]->IsIdle())

			{

			PROFILE_DEBUG1(

			    "CSIPIMSConnectionContext::CleanIdleContexts, context removed")

			context = iContexts[i];

			iContexts.Remove(i);

			delete context;

			context = NULL;	

			}

		}

	iContexts.Compress();

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::SetCredentials

// -----------------------------------------------------------------------------

//

TBool CSIPIMSConnectionContext::SetCredentials(

    const CSIPClientTransaction& aTransaction,

    CSIPHttpDigest& aDigest)

    {

	TBool found = EFalse;

	for (TInt i=0; i < iContexts.Count() && !found; i++)

		{

		if (iSipHttpDigest)

		    {

		    found = iContexts[i]->SetCredentials(aTransaction,*iSipHttpDigest);

		    }

		else

		    {

		    found = iContexts[i]->SetCredentials(aTransaction,aDigest);

		    }

		}

    return found;   

    }

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::SetCredentials

// -----------------------------------------------------------------------------

//

TBool CSIPIMSConnectionContext::SetCredentials(

    const CSIPRefresh& aRefresh,

    CSIPHttpDigest& aDigest)

    {

	TBool found = EFalse;

	for (TInt i=0; i < iContexts.Count() && !found; i++)

		{

		if (iSipHttpDigest)

		    {

		    found = iContexts[i]->SetCredentials(aRefresh,*iSipHttpDigest);

		    }

		else

		    {

		    found = iContexts[i]->SetCredentials(aRefresh,aDigest);

		    }

		}

    return found;    

    }

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::ConnectionUser

// -----------------------------------------------------------------------------

//

TBool CSIPIMSConnectionContext::ConnectionUser( CSIPConcreteProfile& aProfile )

    {

    TBool connectionUser( EFalse );

    if ( aProfile.IapId() == iConnection->IapId() )

        {

        connectionUser = ( iUsers.Find( &aProfile ) != KErrNotFound );

        }

    return connectionUser;

    }

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::SetConnectionUserL

// -----------------------------------------------------------------------------

//    

void CSIPIMSConnectionContext::SetConnectionUserL( 

    CSIPConcreteProfile& aProfile )

    {

    __ASSERT_ALWAYS( iConnection, User::Leave( KErrNotReady ) );

    iUsers.AppendL( &aProfile );

    SetConnectionParameters();

    }

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::CreateSipL

// -----------------------------------------------------------------------------

//

CSIP& CSIPIMSConnectionContext::CreateSipL( 

    MSIPObserver& aSipObserver,

    MSIPHttpDigestChallengeObserver2& aSipHttpDigestObserver )

    {

    __ASSERT_ALWAYS( !iSip, User::Leave( KErrAlreadyExists ) );

    __ASSERT_ALWAYS( !iSipHttpDigest, User::Leave( KErrAlreadyExists ) );

	iSip = CSIP::NewL( TUid::Null(), aSipObserver );

	iSipHttpDigest = CSIPHttpDigest::NewL( *iSip, aSipHttpDigestObserver );

    return *iSip;

    }

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::ResolveL

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

void CSIPIMSConnectionContext::ResolveL()

	{

	CleanProxyResolving();

	ResolveProxyL();

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::ResolveProxyL

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

void CSIPIMSConnectionContext::ResolveProxyL()

	{

	PROFILE_DEBUG1("CSIPIMSConnectionContext::ResolveProxyL")

	if (iProxyResolveRequestId == 0)

		{

		if (iProxyResolver == 0)

			{

			iProxyResolver = CSIPProxyResolver::NewL();

			}

		if (iConnection->State() == CSIPConnection::EActive)

			{

			PROFILE_DEBUG1("CSIPIMSConnectionContext::ResolveProxyL, resolving")

			iProxyResolver->ResolveProxyL(

				iProxyResolveRequestId, iConnection->IapId(), *this);

			}

		}

	PROFILE_DEBUG1("CSIPIMSConnectionContext::ResolveProxyL, exit")

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::CleanProxyResolving

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

void CSIPIMSConnectionContext::CleanProxyResolving()

	{

	PROFILE_DEBUG1("CSIPIMSConnectionContext::CleanProxyResolving")

	if(iProxyResolveRequestId)

		{

		iProxyResolver->Cancel(iProxyResolveRequestId);

		iProxyResolveRequestId = 0;

		}

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::PreviousSIPConnectionState

// -----------------------------------------------------------------------------

//	

CSIPConnection::TState 

CSIPIMSConnectionContext::PreviousSIPConnectionState() const

    {

    return iPreviousConnectionState;

    }

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::Contexts

// -----------------------------------------------------------------------------

//    

RPointerArray<CSIPIMSProfileContext>& CSIPIMSConnectionContext::Contexts()

    {

    return iContexts;

    }

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::ConnectionStateChanged

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

void CSIPIMSConnectionContext::ConnectionStateChanged(

	CSIPConnection::TState aState)

	{

	PROFILE_DEBUG1("CSIPIMSConnectionContext::ConnectionStateChanged")

	if (aState == CSIPConnection::EActive)

		{

		PROFILE_DEBUG1("ConnectionStateChanged, Active")

		TRAP_IGNORE(RefreshLocalIPAddressL(*iConnection))

		}

	else if (aState == CSIPConnection::EInactive

			|| aState == CSIPConnection::EUnavailable)

		{

		PROFILE_DEBUG3("ConnectionStateChanged, state: ", aState)

		CleanProxyResolving();

		}

	else

		{

		PROFILE_DEBUG3("ConnectionStateChanged, state: ", aState)

		//makes pclint happy

		}

	CleanIdleContexts();

	for (TInt i=0; i<iContexts.Count(); i++)

		{

		iContexts[i]->ConnectionStateChanged(aState);

		}

	iPreviousConnectionState = aState;

	} 

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::IncomingResponse

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

void CSIPIMSConnectionContext::IncomingResponse (

	CSIPClientTransaction& aTransaction,

	CSIPRegistrationBinding& aRegistration)

	{

	PROFILE_DEBUG1("CSIPIMSConnectionContext::IncomingResponse")

	TBool handled = EFalse;

	CleanIdleContexts();

	for (TInt i=0; i<iContexts.Count() && !handled; i++)

		{

		const CSIPResponseElements* response = aTransaction.ResponseElements();

		if (response)

		    {

    		TBool isErrorResponse = (response->StatusCode() >= 300);

    		TInt contextCountBefore = iContexts.Count();

    		CSIPIMSProfileContext* context = iContexts[i];

    		context->IncomingResponse(aTransaction, aRegistration, handled);

    		TBool contextRemoved = (iContexts.Count() != contextCountBefore);	

    		if (handled && !contextRemoved && isErrorResponse)

    			{

    			if (context->RetryTimerInUse())

    				{

    				context->RetryDeltaTimer(iContexts[i]->RetryAfterTime(), KErrNone);

    				}

    			else

    				{

    				context->RetryRegistration();

    				}

    			}

		    }

		}

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::ErrorOccured

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

void CSIPIMSConnectionContext::ErrorOccured (

	TInt aError,

	CSIPClientTransaction& aTransaction,

	CSIPRegistrationBinding& aRegistration)

	{

	PROFILE_DEBUG3("CSIPIMSConnectionContext::ErrorOccured with transaction", aError)

	TBool handled = EFalse;

	CleanIdleContexts();

	for (TInt i=0; i<iContexts.Count() && !handled; i++)

		{

		iContexts[i]->CSIPProfileContextBase::ErrorOccured(aError,

		                                                   aTransaction,

		                                                   aRegistration,

		                                                   handled);

		if (handled && (iProxyResolveRequestId == 0))

			{

			if ( iContexts[i]->RetryTimerInUse() )

				{

				iContexts[i]->RetryDeltaTimer( iContexts[i]->RetryAfterTime(), aError );

				}

			else

				{

				iContexts[i]->RetryRegistration();

				}

			}

		}

	}

// -----------------------------------------------------------------------------

// CSIPIMSConnectionContext::ErrorOccured