multimediacommsengine/mmcesrv/mmceserver/src/mcenatstatecreateanswer.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:04:58 +0200
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permissions -rw-r--r--
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/*
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* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  
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*
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*/
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#include "mcenatstatecreateanswer.h"
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#include "mcenatsipsession.h"
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#include "mcenatactions.h"
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#include "mcenatevents.h"
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#include "mceactionset.h"
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#include "mceclientserver.h"
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#include "mcesrvlogs.h"
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#include "nspplugin.h"
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// -----------------------------------------------------------------------------
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// CMceNatStateCreateAnswer::CMceNatStateCreateAnswer
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// -----------------------------------------------------------------------------
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//
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CMceNatStateCreateAnswer::CMceNatStateCreateAnswer()
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	{
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	}
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// -----------------------------------------------------------------------------
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// CMceNatStateCreateAnswer::~CMceNatStateCreateAnswer
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// -----------------------------------------------------------------------------
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//
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CMceNatStateCreateAnswer::~CMceNatStateCreateAnswer()
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	{
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	}
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// -----------------------------------------------------------------------------
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// CMceNatStateCreateAnswer::Accept
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// -----------------------------------------------------------------------------
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//
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TBool CMceNatStateCreateAnswer::Accept( TMceNatStateTransitionEvent& aEvent )
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    {
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    if ( EMceNatAnswer == aEvent.NatCode() ||
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         ( EMceNatHandleSIP == aEvent.NatCode() &&
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           EMceInvite == aEvent.Code() )||
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         EMceNatError == aEvent.NatCode() ||
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         EMceNatICMPError == aEvent.NatCode() )
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        {
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        return ETrue;
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        }
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    else
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        {
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        return EFalse;
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        }
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    }
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// -----------------------------------------------------------------------------
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// CMceNatStateCreateAnswer::EntryL
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// -----------------------------------------------------------------------------
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//
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void CMceNatStateCreateAnswer::EntryL( TMceNatStateTransitionEvent& aEvent )
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	{
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	MCESRV_DEBUG( "*** CMceNatStateCreateAnswer::EntryL, Entry" );
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    aEvent.Session().Actions().EncodeL();
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    TMceReturnStatus status = aEvent.NatActions().ResolveL();
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    if ( KMceReady == status )
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	    {
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	    CMceSipSession& session = aEvent.Session();
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        aEvent.NatCode() = ( KMceReady == aEvent.ParamStatus() ?
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                EMceNatSync : aEvent.NatCode() );
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        aEvent.NatActions().SetOffered( KMceNatPrevOfferSdp );
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        session.Actions().DecodeL(); 
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        aEvent.NatActions().UpdateRemoteAddressL();
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        CSdpDocument* previous = session.Offer();
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        aEvent.NatActions().SetOffered( KMceNatOfferSdp );
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        aEvent.NatActions().SdpCleanup( previous, session.Offer() );
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	    aEvent.NatActions().StateChangedL( aEvent, KMceNatStateConnected );
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	    }
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    else
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        {
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        aEvent.ParamStatus() = status;
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        }
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	MCESRV_DEBUG( "*** CMceNatStateCreateAnswer::EntryL, Exit" );
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	}
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// -----------------------------------------------------------------------------
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// CMceNatStateCreateAnswer::ExitL
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// -----------------------------------------------------------------------------
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//
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void CMceNatStateCreateAnswer::ExitL( TMceNatStateTransitionEvent& aEvent )
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	{
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	MCESRV_DEBUG( "*** CMceNatStateCreateAnswer::ExitL, Entry" );
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	switch ( aEvent.NatCode() )
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	    {
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	    case EMceNatError:
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	    case EMceNatICMPError:
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	        {
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	        ExitErrorL( aEvent );
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	        break;
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	        }
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	    case EMceNatHandleSIP:
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	        {
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	        ExitHandleInviteL( aEvent );
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	        break;
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	        }
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	    default:
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	        {
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	        ExitDefaultL( aEvent );
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	        break;
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	        }
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	    }
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	MCESRV_DEBUG( "*** CMceNatStateCreateAnswer::ExitL, Exit" );	
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	}
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// -----------------------------------------------------------------------------
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// CMceNatStateCreateAnswer::ExitErrorL
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// -----------------------------------------------------------------------------
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//
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void CMceNatStateCreateAnswer::ExitErrorL( TMceNatStateTransitionEvent& aEvent )
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    {
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    TMceStateIndex sipState = aEvent.Session().CurrentState().Id();
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   141
          
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    if ( aEvent.ParamStatus() > KMceNatNonFatalErrorLimit )
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        {
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        aEvent.Session().Actions().ClientErrorOccured( aEvent.ParamStatus() );
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        }
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   146
    
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   147
    
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    if (( aEvent.NatCode() == EMceNatICMPError && 
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    		KMceStateEstablished == sipState ) || 
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    		aEvent.NatCode() == EMceNatError )  
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    	{
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    	aEvent.NatActions().Continue();
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    	User::Leave( aEvent.ParamStatus() );		
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    	}
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   155
       
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    }
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   157
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// -----------------------------------------------------------------------------
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// CMceNatStateCreateAnswer::ExitHandleInviteL
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// -----------------------------------------------------------------------------
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//
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void CMceNatStateCreateAnswer::ExitHandleInviteL( TMceNatStateTransitionEvent& aEvent )
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    {
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    CMceSipSession& session = aEvent.Session();
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    if ( MceSip::HasContent( session.Request() ) )
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        {
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        // Incoming INVITE contained new SDP, which can contain new candidates,
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        // hence it is given to NAT FW - without state update.
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        User::LeaveIfError( session.Actions().CreateSDP( session.Request() ) );
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        aEvent.NatActions().UpdateL();
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   172
        }
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   173
    
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    // Not consumed, done by SIP state machine
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    aEvent.NatActions().Continue();
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    }
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   177
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// -----------------------------------------------------------------------------
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// CMceNatStateCreateAnswer::ExitDefaultL
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// -----------------------------------------------------------------------------
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//
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void CMceNatStateCreateAnswer::ExitDefaultL( TMceNatStateTransitionEvent& aEvent )
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    {
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   184
	
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	// Check if plugin has flag setup if yes signall that at the session level.
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	TInt status = aEvent.NatActions().GetResourceReservationStatus();
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   187
	
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   188
	if ( status == CNSPPlugin::ENSPResourcesNotReserved )
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   189
		{
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		aEvent.NatActions().SetNeedtoReceive();	
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   191
		}
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   192
	
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   193
    User::LeaveIfNull( aEvent.Document() );
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   194
    CMceSipSession& session = aEvent.Session();
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   195
    
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   196
    CSdpDocument* previous = session.Offer();
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   197
    aEvent.Session().SetOffer( aEvent.Document() );
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   198
    aEvent.NatActions().SetOffered( KMceNatOfferSdp );
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   199
    aEvent.NatActions().SdpCleanup( previous, session.Offer() );
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   200
    
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   201
    aEvent.NatActions().StateChangedL( aEvent, KMceNatStateDecodeOffer );
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   202
    }