// Copyright (c) 2004-2009 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:

//

/**

 @file

 @internalComponent

*/

#include <bluetooth/logger.h>

#include <es_mbuf.h>

#include "CBnepLink.h"

#include "CSocketReader.h"

#ifdef __FLOG_ACTIVE

_LIT8(KLogComponent, LOG_COMPONENT_PAN_BNEP);

#endif

// Class CSocketReader 

CSocketReader::CSocketReader (RInternalSocket& aSocket, CBnepLink& aOwner)

    : CActive(KSocketReaderPriority), iSocket(aSocket), iBnepLink(aOwner)

    {

    LOG_FUNC

    CActiveScheduler::Add(this); 

    }

/**

Cancels any pending reads.

@internalComponent

*/

CSocketReader::~CSocketReader()

    {

    LOG_FUNC

    iRecvMsg.Free();

    Cancel();

    }

/**

Does not create the socket reader's buffer, as this initialised 

as a side effect of the RInternalSocket::Read(), 

which has a hardcoded buffer size for Bluetooth - Maintainer BEWARE!!!!!.

@internalComponent

*/

void CSocketReader::ConstructL ()

    {

    LOG_FUNC

    }

/**

Cancel a read.

@internalComponent

*/

void CSocketReader::DoCancel ()

    {

    LOG_FUNC

    iSocket.CancelRead(); 

    }

/**

Create a socket reader.

@internalComponent

*/

CSocketReader* CSocketReader::NewL (RInternalSocket& aSocket, CBnepLink& aOwner)

    {

    LOG_STATIC_FUNC

    CSocketReader* self = new(ELeave) CSocketReader(aSocket, aOwner);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self; 

    }

/**

Queue a read.

@internalComponent

*/

void CSocketReader::Read ()

    {

    LOG_FUNC

    LOG1(_L8("Reader 0x%08x -- queueing read"), this);

    if (!IsActive())

        {

        // Ensure that the MBufChain that we are receiving into is available

        // by free-ing any data currently in it.

        iRecvMsg.Free();

        // As RMBufChain is essentially a pointer, the data returned must be consumed

        // later either by re-assigning or by free-ing it.  This is a bit unlike a

        // real RSocket, where the descriptor is simply overwritten.

        iSocket.Read(iRecvMsg, iStatus);

        SetActive(); 

        }

    else

        {

        LOG(_L8("Read queued but reader already active.  Discarding"));

        }

    }

/**

Read complete.

Pass the received data up to the BNEP link, and signal disconnections.

This method effectively triggers a long sequence of synchronous calls 

into BNEP that culminate either in the completion of packet processing 

or an asynchronous hiatus while waiting for the agent to respond to a 

request.

@internalComponent

*/

void CSocketReader::RunL ()

    {

    LOG_FUNC

    // Save iStatus value to allow us to queue a new read prior to finishing processing

    // this one

    TInt err = iStatus.Int();

    LOG2(_L8("Length %d error %d"),iRecvMsg.Length(), err);

    if (iRecvMsg.Length())	// send any data up

        {

        // This is what kicks off the long processing 

        // sequence that may culminate in a write.

        // Note that this call may cause calls back down to CSocketReader

        iBnepLink.ReadComplete(iRecvMsg);

        LOG1(_L8("After ReadComplete Length %d"),iRecvMsg.Length());

        }

    if (err != KErrNone)	// if the connection has failed for some reason

        {

        LOG(_L8("Attempting a remote device disconnect"));

        // Cancel any new read queued

        Cancel();

        iBnepLink.RemoteDeviceDisconnect(err); // then notify the upper layer of the disconnect

        }

    }