/*

* Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

*      Implementation of class CConnection.   

*      

*

*/

// INCLUDE FILES

#include "Connection.h"

#include "CodPanic.h"

#include "CodUtil.h"

#include "CodError.h"

#include "CodLogger.h"

#include <CommDbConnPref.h>

#include <cdblen.h>

#include <es_enum.h>

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

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

// CConnection::NewL()

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

//

CConnection* CConnection::NewL()

    {

    CConnection* conn = new (ELeave) CConnection();

    CleanupStack::PushL( conn );

    conn->ConstructL();

    CleanupStack::Pop( conn );

    return conn;

    }

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

// CConnection::~CConnection()

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

//

CConnection::~CConnection()

    {

    Cancel();

    DoClose();

    }

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

// CConnection::ConnectL()

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

//

void CConnection::ConnectL( TUint32 aIap, TRequestStatus* aStatus )

    {

    CLOG(( EConn, 2, _L("-> CConnection::ConnectL iap(%d)"), aIap ));

    // Misuse asserts.

    __ASSERT_ALWAYS( aStatus, CodPanic( ECodInvalidArguments ) );

    // Internal asserts.

    __ASSERT_DEBUG( !iParentStatus, CodPanic( ECodInternal ) );

    iStatus = KErrCodCannotConnect;

    if ( iState == EConnected )

        {

        // Already connected; do nothing.

        CLOG(( EConn, 4, _L("  already connected") ));

        iStatus = KErrNone;

        }

    else if ( iState == EInit )

        {

        // Not connected. Create connection.

        CLOG(( EConn, 4, _L("  starting connection") ));

        // Make this part atomic by pushing closes on the stack.

        User::LeaveIfError( iSockServ.Connect() );

        CleanupClosePushL<RSocketServ>( iSockServ );

        User::LeaveIfError( iConn.Open( iSockServ ) );

        CleanupClosePushL<RConnection>( iConn );

        iConnPref.SetDirection( ECommDbConnectionDirectionOutgoing );

        if ( aIap )

            {

            // Use specified IAP.

            iConnPref.SetIapId( aIap );

            iConnPref.SetDialogPreference( ECommDbDialogPrefDoNotPrompt );

            }

        else

            {

            // aIap == 0 -> user select.

            iConnPref.SetDialogPreference( ECommDbDialogPrefPrompt );

            }

        iState = EConnecting;

        SetActive();

        CleanupStack::Pop( 2 ); // closing iConn and iSockServ

        // End of atomic part.

        }

    else

        {

        // Not expecting this to be called in other states.

        CLOG(( EConn, 0, _L("CConnection::ConnectL: unexpected state (%d)"), \

                                                                    iState ));

        __ASSERT_ALWAYS( EFalse, CodPanic( ECodInternal ) );

        }

    iParentStatus = aStatus;

    *iParentStatus = KRequestPending;

    if ( !IsActive() )

        {

        // Unless we have an outstanding connect request (iConn.Start),

        // we are done.

        Done();

        }

    CLOG(( EConn, 2, _L("<- CConnection::ConnectL") ));

    }

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

// CConnection::AttachL()

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

//

void CConnection::AttachL( TUint32 aIap )

    {

    CLOG(( EConn, 2, _L("-> CConnection::AttachL iap(%d)"), aIap ));

    iStatus = KErrCodCannotConnect;

    if ( iState == EConnected )

        {

        // Already connected; do nothing.

        CLOG(( EConn, 4, _L("  already connected") ));

        iStatus = KErrNone;

        }

    else if ( iState == EInit )

        {

        // Not connected. Create connection, or attach to existing.

        CLOG(( EConn, 4, _L("  not connected") ));

        if ( aIap )

            {

            // Make this part atomic by pushing closes on the stack.

            User::LeaveIfError( iSockServ.Connect() );

            CleanupClosePushL<RSocketServ>( iSockServ );

            User::LeaveIfError( iConn.Open( iSockServ ) );

            CleanupClosePushL<RConnection>( iConn );

            TConnectionInfoBuf connInfo;

            TUint count;

            User::LeaveIfError( iConn.EnumerateConnections( count ) );

            CLOG(( EConn, 4, _L("  %d existing connections"), count ));

            TUint i;

            for ( i = count; i; i-- )

                {

                // Note: GetConnectionInfo expects 1-based index.

                User::LeaveIfError( iConn.GetConnectionInfo( i, connInfo ) );

                CLOG(( EConn, 4, _L("  conn(%d) iap(%d)"), \

                                                i, connInfo().iIapId ));

                if ( connInfo().iIapId == aIap )

                    {

                    CLOG(( EConn, 4, _L("  attach"), i, count ));

                    User::LeaveIfError( iConn.Attach

                        ( connInfo, RConnection::EAttachTypeNormal ) );

                    iState = EConnected;

                    iStatus = KErrNone;

                    break;

                    }

                }

            CleanupStack::Pop( 2 ); // closing iConn and iSockServ

            // End of atomic part.

            }

        if ( iState == EInit )

            {

            CLOG(( EConn, 4, _L("  ended unconnected") ));

            iConn.Close();

            iSockServ.Close();

            }

        }

    else

        {

        // Not expecting this to be called in other states.

        CLOG(( EConn, 0, _L("CConnection::AttachL: unexpected state (%d)"), \

                                                                    iState ));

        __ASSERT_ALWAYS( EFalse, CodPanic( ECodInternal ) );

        }

    User::LeaveIfError( iStatus.Int() );

    CLOG(( EConn, 2, _L("<- CConnection::AttachL") ));

    }

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

// CConnection::Close()

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

//

void CConnection::Close()

    {

    CLOG(( EConn, 2, _L("-> CConnection::Close") ));

    Cancel();

    DoClose();

    CLOG(( EConn, 2, _L("<- CConnection::Close") ));

    }

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

// CConnection::IsConnected()

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

//

TBool CConnection::IsConnected( TUint32& aIap )

    {

    TBool connected( EFalse );

    if( iState == EConnected )

        {

        TBuf<KCommsDbSvrMaxColumnNameLength * 2 + 1> iapId;

        _LIT( KFormatIapId, "%S\\%S" );

        TPtrC iap( IAP );

        TPtrC id( COMMDB_ID );

        iapId.Format( KFormatIapId, &iap, &id );

        TInt err = iConn.GetIntSetting( iapId, aIap );

        connected = err ? EFalse : ETrue;

        }

    return connected;

    }

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

// CConnection::CConnection()

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

//

CConnection::CConnection()

: CActive( CActive::EPriorityStandard ),

  iState( EInit )

    {

    CActiveScheduler::Add( this );

    }

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

// CConnection::ConstructL()

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

//

void CConnection::ConstructL()

    {

    if ( !CodUtil::ApCountL() )

        {

        // It's futile to try making a connection without an AP, so leave if

        // we don't have any.

        User::Leave( KErrCodNoAccessPoint );

        }

    }

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

// CConnection::DoCancel()

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

//

void CConnection::DoCancel()

    {

    CLOG(( EConn, 2, _L("-> CConnection::DoCancel") ));

    __ASSERT_DEBUG( iState == EConnecting, CodPanic( ECodInternal ) );

    // RConnection has no cancel method matching the async RConnection::Start.

    // The only way to cancel is to close the RConnection.

    // (Our request will complete with KErrCancel, as expected.)

    DoClose();

    Done();

    CLOG(( EConn, 2, _L("<- CConnection::DoCancel") ));

    }

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

// CConnection::RunL()

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

//

void CConnection::RunL()

    {

    CLOG(( EConn, 2, _L("-> CConnection::RunL iStatus(%d)"), \

        iStatus.Int() ));

    __ASSERT_DEBUG( iState == EConnecting, CodPanic( ECodInternal ) );

    User::LeaveIfError( iStatus.Int() );    // Handle errors in RunError().

    iState = EConnected;

    Done();

    CLOG(( EConn, 2, _L("<- CConnection::RunL") ));

    }

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

// CConnection::RunError()

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

//

TInt CConnection::RunError( TInt LOG_ONLY( aError ) )

    {

    CLOG(( EConn, 2, _L("-> CConnection::RunError aError(%d)"), aError ));

    __ASSERT_DEBUG( iState == EConnecting, CodPanic( ECodInternal ) );

    DoClose();

    Done();

    CLOG(( EConn, 2, _L("<- CConnection::RunError") ));

    return KErrNone;

    }

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

// CConnection::DoClose()

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

//

void CConnection::DoClose()

    {

    CLOG(( EConn, 2, _L("CConnection::DoClose") ));

    iConn.Close();

    iSockServ.Close();

    iState = EInit;

    }

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

// CConnection::Done()

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

//

void CConnection::Done()

    {

    CLOG(( EConn, 2, _L("CConnection::Done iStatus(%d)"), iStatus.Int() ));

    __ASSERT_DEBUG( iParentStatus, CodPanic( ECodInternal ) );

    User::RequestComplete( iParentStatus, iStatus.Int() );

    iParentStatus = NULL;

    }