/*

* Copyright (c) 2007 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:  Localcand state implementation.

*

*/

#include <sdpdocument.h>

#include "nspstatelocalcand.h"

#include "nspevents.h"

#include "nspsession.h"

#include "nspactionset.h"

#include "nspsessiondata.h"

#include "nspcontentparser.h"

#include "nspdefs.h"

static void CondAddMismatchL( CNSPSession& aSession,

		CSdpDocument& aOffer, CSdpDocument& aAnswer )

	{

	if ( aSession.Data().SubState() == CNSPSessionData::ESubMismatch ||

	     aSession.Data().SubState() == CNSPSessionData::ESubAll )

		{

		aSession.Parser().AddMismatchL( aOffer, aAnswer );

		}

	}

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

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

// CNSPStateLocalCand::CNSPStateLocalCand

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

//

CNSPStateLocalCand::CNSPStateLocalCand()

    {

    }

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

// CNSPStateLocalCand::NewL

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

//

CNSPStateLocalCand* CNSPStateLocalCand::NewL()

    {

    CNSPStateLocalCand* self = CNSPStateLocalCand::NewLC();

    CleanupStack::Pop( self );

    return self;

    }

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

// CNSPStateLocalCand::NewLC

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

//

CNSPStateLocalCand* CNSPStateLocalCand::NewLC()

    {

    CNSPStateLocalCand* self = new ( ELeave ) CNSPStateLocalCand;

    CleanupStack::PushL( self );

    return self;

    }

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

// CNSPStateLocalCand::~CNSPStateLocalCand

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

//

CNSPStateLocalCand::~CNSPStateLocalCand()

    {

    }

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

// CNSPStateLocalCand::DoAcceptL

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

//

TBool CNSPStateLocalCand::DoAcceptL( TNSPStateMachineEvent& aEvent )

    {

    User::LeaveIfError(

            TNSPStateMachineEvent::ENat == aEvent.Request() ||

            TNSPStateMachineEvent::EUpdate == aEvent.Request() ||

            TNSPStateMachineEvent::EReservationStatus == aEvent.Request() ||

            TNSPStateMachineEvent::ECloseSession == aEvent.Request() ?

                    KErrNone : KErrArgument );

    return ETrue;

    }

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

// CNSPStateLocalCand::DoStateEntryL

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

//

void CNSPStateLocalCand::DoStateEntryL( TNSPStateMachineEvent& aEvent )

    {

    aEvent.Session().Actions().LoadPluginL();

    aEvent.Session().Actions().FetchL();

    }

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

// CNSPStateLocalCand::DoReverse

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

//

void CNSPStateLocalCand::DoReverse( TNSPStateMachineEvent& /*aEvent*/ )

    {

    }

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

// CNSPStateLocalCand::DoApplyL

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

//

void CNSPStateLocalCand::DoApplyL( TNSPStateMachineEvent& aEvent )

    {

    switch( aEvent.Request() )

        {

        case TNSPStateMachineEvent::ENat:

            {

            ControlMediaL( aEvent );

            break;

            }

        case TNSPStateMachineEvent::EUpdate:

            {

            ApplyUpdateL( aEvent );

            break;

            }

        case TNSPStateMachineEvent::EReservationStatus:

            {

            aEvent.Status() = KNatAsync;

            break;

            }

        case TNSPStateMachineEvent::ECloseSession:

            {

            aEvent.Status() = KNatReady;

            break;

            }

        default:

            {

            User::Leave( KErrArgument );

            }

        }

    }

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

// CNSPStateLocalCand::DoExitL

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

//

void CNSPStateLocalCand::DoExitL( TNSPStateMachineEvent& aEvent )

    {

    CNSPSession& session = aEvent.Session();

    switch( aEvent.Request() )

        {

        case TNSPStateMachineEvent::ENat:

            {

            if ( ANSWERER( session.Role() ) )

            	{

            	aEvent.Answer() = session.Data().ReleaseAnswer();

            	aEvent.CallbackType() = TEventReturnStatus::EAnswerReady;

            	}

            break;

            }

        default:

            {

            User::Leave( KErrArgument );

            }

        }

    }

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

// CNSPStateLocalCand::ControlMediaL

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

//

void CNSPStateLocalCand::ControlMediaL( TNSPStateMachineEvent& aEvent ) const

    {

    TNSPStateMachineMediaEvent& event = MEDIAEVENT( aEvent );

    TNatReturnStatus status = event.Session().Actions().ControlMediaL(

    		event.StreamId(), event.Event(), event.Status(), event.Data() );

    if ( NSP_TRIGGER( status ) )

    	{

    	ApplyNatL( event );

    	}

    else

    	{

        event.Status() = status;

    	}

    }

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

// CNSPStateLocalCand::ApplyNatL

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

//

void CNSPStateLocalCand::ApplyNatL( TNSPStateMachineEvent& aEvent ) const

    {

    CNSPSession& session = aEvent.Session();

    CSdpDocument& offer = session.Data().Offer();

    TNSPStateIndex nextstate = KStateIndexNegotiating;

    TNatReturnStatus status = KNatReady;

    if ( OFFERER( session.Role() ) )

        {

        session.Actions().FirstRoundL( offer );

        }

    else if ( ANSWERER( session.Role() ) )

        {

        CSdpDocument& answer = session.Data().Answer();

        session.Actions().FirstRoundL( answer );

        CondAddMismatchL( session, offer, answer );

        session.Actions().SetInboundCredentialsL();

        session.Actions().GetCredentialsL( offer );

        session.Actions().GetCandidatesL( offer );

        nextstate = ( session.Data().UseIce() ?

                KStateIndexResolving : KStateIndexActivating );

        status = KNatAsync;

        }

    else

        {

        User::Leave( KErrArgument );

        }

    aEvent.NextState() = nextstate;

    aEvent.Status() = status;

    }

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

// CNSPStateLocalCand::ApplyUpdateL

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

//

void CNSPStateLocalCand::ApplyUpdateL( TNSPStateMachineEvent& aEvent ) const

    {

    CNSPSession& session = aEvent.Session();

    CSdpDocument* offer = aEvent.Offer();

    if ( KNatAsync == session.Actions().GetCandidatesL( *offer ) )

        {

        session.Actions().UpdateL();

        }

    aEvent.Status() = KNatAsync;

    }

// end of file