/*

* Copyright (c) 2006-2007 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:    Connection multiplexer connection abstraction.

*

*/

#include <commdbconnpref.h>

#include "cncmconnection.h"

#include "cncmtcpsender.h"

#include "cncmudpsender.h"

#include "cncmtcpreceiver.h"

#include "cncmudpreceiver.h"

#include "cncmconnectionobserverhandler.h"

#include "ncmconnectionmultiplexerlogs.h"

#include "mncmmultiplexerconnectionobserver.h"

#include "ncmconnectionmultiplexerassert.h"

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

// CNcmConnection::CNcmConnection

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

//

CNcmConnection::CNcmConnection( TUint aSessionId, TUint aStreamId,

    TUint aConnectionId, const TInetAddr& aLocalAddr,

    MNcmMultiplexerConnectionObserver& aObserver,

    CNcmConnectionObserverHandler& aConnectionObserverHandler,

    TInt aQos, RSocketServ& aSocketServ, RConnection& aConnection,

    TUint aProtocol, TBool aReuseAddress ) :

    CActive( EPriorityStandard ), iSessionId( aSessionId ),

    iStreamId( aStreamId ), iConnectionId( aConnectionId ),

    iLocalAddr( aLocalAddr ), iObserver( aObserver ),

    iConnectionObserverHandler( aConnectionObserverHandler ),

    iIpTOS( aQos ), iProtocol( aProtocol ), iReuseAddress( aReuseAddress ),

    iSocketServ( aSocketServ ), iConnection( aConnection ), 

    iDestinationAddress( KInetAddrNone, 0 ),

    iReceiverState( EStreamingStatePassive ),

    iSenderState( EStreamingStatePassive ),

    iTcpConnectionState( ETcpConnectionUnspecifiedState )

    {

    CActiveScheduler::Add( this );

    }

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

// CNcmConnection::NewL

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

//

CNcmConnection* CNcmConnection::NewL(TUint aSessionId, TUint aStreamId,

    TUint aConnectionId, const TInetAddr& aLocalAddr,

    MNcmMultiplexerConnectionObserver& aObserver,

    CNcmConnectionObserverHandler& aConnectionObserverHandler,TInt aQos,

    RSocketServ& aSocketServ, RConnection& aConnection,

    TUint aProtocol, TBool aReuseAddress )

    {

    __CONNECTIONMULTIPLEXER( "CNcmConnection::NewL" )

    CNcmConnection* self =

        CNcmConnection::NewLC( aSessionId, aStreamId, aConnectionId,

            aLocalAddr, aObserver, aConnectionObserverHandler, aQos,

            aSocketServ, aConnection, aProtocol, aReuseAddress );

    CleanupStack::Pop( self );

    return self;

    }

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

// CNcmConnection::NewLC

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

//

CNcmConnection* CNcmConnection::NewLC( TUint aSessionId, TUint aStreamId,

    TUint aConnectionId, const TInetAddr& aLocalAddr,

    MNcmMultiplexerConnectionObserver& aObserver,

    CNcmConnectionObserverHandler& aConnectionObserverHandler, TInt aQos,

    RSocketServ& aSocketServ, RConnection& aConnection, TUint aProtocol,

    TBool aReuseAddress )

    {

    __CONNECTIONMULTIPLEXER( "CNcmConnection::NewLC" )

    CNcmConnection* self =

        new( ELeave ) CNcmConnection( aSessionId, aStreamId, aConnectionId,

            aLocalAddr, aObserver, aConnectionObserverHandler, aQos,

            aSocketServ, aConnection, aProtocol, aReuseAddress );

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

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

// CNcmConnection::ConstructL

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

//

void CNcmConnection::ConstructL()

    {

    __CONNECTIONMULTIPLEXER( "CNcmConnection::ConstructL" )

    switch( iProtocol )

        {

        case KProtocolInetTcp:

            {

            InitializeTcpL();                                                  

            break;

            }

        case KProtocolInetUdp:

            {

            InitializeUdpL();

            break;

            }

        default:

            {

            __CONNECTIONMULTIPLEXER_ASSERT_L( EFalse, KErrNotSupported );

            }

        }   

    __CONNECTIONMULTIPLEXER_ADDRLOG(

        "CNcmConnection::ConstructL - EXIT - LOCAL ADDRESS: ", iLocalAddr )

    }

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

// CNcmConnection::~CNcmConnection

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

//

CNcmConnection::~CNcmConnection()

    {

    __CONNECTIONMULTIPLEXER( "CNcmConnection::~CNcmConnection" )

    Cancel();

    delete iSender;   

    delete iReceiver;

    iSocket.Close();

    iListenSocket.Close();

    delete iMessage;

    }

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

// CNcmConnection::OpenTcpConnectionL

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

//

void CNcmConnection::OpenTcpConnectionL( TNATFWTcpConnectionSetup aConfig,

    const TInetAddr& aDestAddr )

    {

    __CONNECTIONMULTIPLEXER_ASSERT_L(

        KProtocolInetTcp == iProtocol, KErrArgument );

    __CONNECTIONMULTIPLEXER_ASSERT_L(

        ETcpConnectionUnspecifiedState == iTcpConnectionState, KErrInUse );

    __CONNECTIONMULTIPLEXER_ADDRLOG(

        "CNcmConnection::OpenTcpConnectionL - DEST ADDRESS: ", aDestAddr )

    __CONNECTIONMULTIPLEXER_ADDRLOG(

        "CNcmConnection::OpenTcpConnectionL - LOCAL ADDRESS: ", iLocalAddr )

    iConnSetupConf = aConfig;    

    iDestinationAddress = aDestAddr;

    if ( ETcpSetupActive == aConfig )

        {

        User::LeaveIfError( iSocket.Open( iSocketServ, KAfInet, 

            KSockStream, KProtocolInetTcp, iConnection ) );

        User::LeaveIfError(

            iSocket.SetOpt( KSoIpTOS, KSolInetIp, iIpTOS ) );

        // Listener socket has same local address.                                

        User::LeaveIfError(

            iSocket.SetOpt( KSoReuseAddr, KProtocolInetIp, 1 ) );

        User::LeaveIfError( iSocket.Bind( iLocalAddr ) );

        iSocket.Connect( iDestinationAddress, iStatus );

        }

    else if ( ETcpSetupPassive == aConfig )

        {

        User::LeaveIfError( iSocket.Open( iSocketServ ) );

        if ( !iIsListening )

            {

            User::LeaveIfError( iListenSocket.Listen( 1 ) );

            iIsListening = ETrue;

            }

        iListenSocket.Accept( iSocket, iStatus );   

        }

    else

        {

        __CONNECTIONMULTIPLEXER(

            "CNcmConnection::OpenTcpConnectionL - Default branch" )

        __CONNECTIONMULTIPLEXER_ASSERT_L( EFalse, KErrNotSupported );

        }

    iTcpConnectionState = ETcpConnectionConnectingState;    

    SetActive(); 

    }  

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

// CNcmConnection::CloseTcpConnectionL

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

//

void CNcmConnection::CloseTcpConnectionL()

    {

    __CONNECTIONMULTIPLEXER( "CNcmConnection::CloseTcpConnectionL" )

    __CONNECTIONMULTIPLEXER_ASSERT_L(

        KProtocolInetTcp == iProtocol, KErrArgument );

    __CONNECTIONMULTIPLEXER_ASSERT_L(

        ETcpConnectionUnspecifiedState != iTcpConnectionState, KErrNotReady );

    // Cancel all outstanding operations

    iSender->Cancel();

    iReceiver->Cancel();

    Cancel();

    // Close the socket

    iListenSocket.CancelAll(); 

    iSocket.Close();

    iSenderState = EStreamingStatePassive;

    iReceiverState = EStreamingStatePassive; 

    if (  ETcpConnectionConnectingState == iTcpConnectionState )

        {

        iObserver.ConnectionNotify( iStreamId, iConnectionId,

            EMultiplexerTcpSetupCompleted, KErrCancel );

        }

    iTcpConnectionState = ETcpConnectionUnspecifiedState;    

    }

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

// CNcmConnection::SetReceivingStateL

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

//

void CNcmConnection::SetReceivingStateL(

    TNATFWStreamingState aState )

    {

    switch( aState )

        {

        case EStreamingStateActive:

            this->ActivateReceivingL();

            break;

        case EStreamingStatePassive:           

            this->DeactivateReceivingL();

            break;

        default:

            {

            __CONNECTIONMULTIPLEXER_FAILURE_L( KErrNotSupported );

            }

        }

    }

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

// CNcmConnection::SetSendingStateL

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

//

void CNcmConnection::SetSendingStateL(

    const TInetAddr& aDestAddr, TNATFWStreamingState aState )

    { 

    switch( aState )

        {

        case EStreamingStateActive:

            this->ActivateSendingL( aDestAddr );

            break;

        case EStreamingStatePassive:      

            this->DeactivateSendingL();

            break;

        default:

            __CONNECTIONMULTIPLEXER_FAILURE_L( KErrNotSupported );

        }  

    }

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

// CNcmConnection::CheckSenderValidityToSending

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

//

TBool CNcmConnection::CheckSenderValidityToSending(

    const TInetAddr& aDestinationAddr )

    {

    if ( iIsGenericDestination && KProtocolInetUdp == iProtocol )

        {

        static_cast<CNcmUdpSender*>( iSender )->SetDestination(

                aDestinationAddr );

        }

    TBool validity( EFalse );

    if ( EStreamingStateActive == iSenderState 

        && iDestinationAddress.CmpAddr( aDestinationAddr ) )

        {

        __CONNECTIONMULTIPLEXER(

            "CNcmConnection::CheckSenderValidityToSending TRUE" )

        validity = ETrue;

        }

    else

        {

        __CONNECTIONMULTIPLEXER(

            "CNcmConnection::CheckSenderValidityToSending FALSE" )

        }

    return validity;

    }

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

// CNcmConnection::DestinationAddress

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

//

const TInetAddr& CNcmConnection::DestinationAddress() const

    {

    return iDestinationAddress;

    }

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

// CNcmConnection::CancelMessageSendL

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

//

void CNcmConnection::CancelMessageSendL(

    const MNcmSenderObserver* aSenderObserver )

    {

    iSender->CancelMessageSendL( aSenderObserver );

    }

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

// CNcmConnection::IsGenericDestination

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

//

TBool CNcmConnection::IsGenericDestination() const

    {

    __CONNECTIONMULTIPLEXER_INT1(

        "CNcmConnection::IsGenericDestination", iIsGenericDestination )

    return iIsGenericDestination;

    }

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

// CNcmConnection::SetAcceptedFromAddressL

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

//

void CNcmConnection::SetAcceptedFromAddressL( const TInetAddr& aAddress )

    {

    __CONNECTIONMULTIPLEXER_ADDRLOG(

        "CNcmConnection::SetAcceptedFromAddressL - Entry, aAddress: ", aAddress )           

    __CONNECTIONMULTIPLEXER_ADDRLOG(

        "CNcmConnection::SetAcceptedFromAddressL - Entry, iAcceptedFromAddr: ", iAcceptedFromAddr )

    __CONNECTIONMULTIPLEXER_ASSERT_L(

        KProtocolInetUdp == iProtocol, KErrArgument );

    if ( !IsActive() )

        {       

        iAcceptedFromAddr = aAddress;

        iSender->Cancel();  

        iReceiver->Cancel();

        if ( KAFUnspec != aAddress.Address() )

            {

            iSocket.Connect( iAcceptedFromAddr, iStatus );

            SetActive(); 

            }

        else

            {

            iReuseAddress = ETrue;

            iSocket.Close();

            this->InitializeUdpL();

            if ( iReceiverState == EStreamingStateActive )

                {

                iReceiver->Activate();

                } 

            }        

        }

    else

        {

        __CONNECTIONMULTIPLEXER( "CNcmConnection::SetAcceptedFromAddressL - State not valid" ) 

        }

    __CONNECTIONMULTIPLEXER_ADDRLOG(

        "CNcmConnection::SetAcceptedFromAddressL - Exit, iAcceptedFromAddr: ", iAcceptedFromAddr )

    }

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

// CNcmConnection::Send

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

//

void CNcmConnection::Send( const TDesC8& aMessage,

    const TInetAddr& aDestinationAddress,

    MNcmSenderObserver* aSenderObserver )

    {

    __CONNECTIONMULTIPLEXER( "CNcmConnection::Send" )

    // Notify source observer from message

    this->OutgoingMessageAvailable( aMessage, aSenderObserver,

        aDestinationAddress );

    }

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

// CNcmConnection::SendDirectlyToNetwork

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

//

void CNcmConnection::SendDirectlyToNetwork( const TDesC8& aMessage,

    MNcmSenderObserver* aSenderObserver )

    {

    __CONNECTIONMULTIPLEXER( "CNcmConnection::SendDirectlyToNetwork" )

    if ( EStreamingStateActive != iSenderState )

        {

        iObserver.ConnectionNotify( iStreamId,

                                    iConnectionId, 

                                    EMultiplexerConnectionError,

                                    KErrNotReady );

        }

    else

        {

        iSender->Send( aMessage, aSenderObserver );

        }

    }

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

// CNcmConnection::ConnectionId

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

//

TUint CNcmConnection::ConnectionId() const

    {

    return iConnectionId;

    }

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

// CNcmConnection::LocalAddress

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

//

TInetAddr& CNcmConnection::LocalAddress()

    {

    return iLocalAddr;

    }

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

// From class MNcmSourceObserver

//

// CNcmConnection::OutgoingMessageAvailable

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

//

void CNcmConnection::OutgoingMessageAvailable( const TDesC8& aMessage,

    MNcmSenderObserver* aSenderObserver, const TInetAddr& aDestAddr )

    {

    __CONNECTIONMULTIPLEXER( "CNcmConnection::OutgoingMessageAvailable" )

    TBool consumed( EFalse );

    TInt error( KErrNoMemory );

    // get message

    delete iMessage;

    iMessage = NULL;

    iMessage = aMessage.Alloc();

    if ( iMessage )

        {

        error = KErrNone;

        // see if observing objects need this message

        TRAP( error, consumed = 

            iConnectionObserverHandler.RevealOutgoingMessageL(

            iStreamId, iConnectionId, iMessage, aDestAddr ) )

        }

    if ( KErrNone != error || !iMessage )

        {

        iObserver.ConnectionError( iSessionId,

                                   iStreamId,

                                   iConnectionId,

                                   EMultiplexerConnectionError,

                                   error );        

        }

    else if ( !consumed )

        {

        __CONNECTIONMULTIPLEXER( 

            "CNcmConnection::OutgoingMessageAvailable - lets send message to network" )

        SendDirectlyToNetwork( *iMessage, aSenderObserver );

        }

    else

        {

        __CONNECTIONMULTIPLEXER( 

            "CNcmConnection::OutgoingMessageAvailable - message consumed" )        

        }                           

    }

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

// From class MNcmReceiverSenderObserver

//

// CNcmConnection::MessageAvailable

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

//

void CNcmConnection::MessageAvailable()

    {

    __CONNECTIONMULTIPLEXER_INT1(

        "CNcmConnection::MessageAvailable - connection ID: ", iConnectionId ) 

    TBool consumed( EFalse );

    TInt error( KErrNoMemory );

     // get message

    delete iMessage;

    iMessage = NULL;