// Copyright (c) 2004-2010 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:

//

#include "hciloggerbtsnoop.h"

static const TInt KSnoopLogFileHeaderSize = 16; // bytes

static const TInt KSnoopLogRecordHeaderSize = 24; // bytes

static const TUint KSnoopLogVersion = 1;

static const TInt KHCILoggerFileCloseTime = 5000000; // 5 seconds

_LIT8(KSnoopLogBlankDescriptor, "");

_LIT8(KSnoopLogFileHeaderFormat, "btsnoop\0%M%M");

_LIT8(KSnoopLogRecordHeaderFormat, "%M%M%M%M%M%M");

#ifdef __WINS__

_LIT(KSnoopLogFileH1,		"\\shared\\hcilogger\\hcilog_H1.log");

_LIT(KSnoopLogFileH4,		"\\shared\\hcilogger\\hcilog_H4.log");

_LIT(KSnoopLogFileBCSP,		"\\shared\\hcilogger\\hcilog_Bcsp.log");

_LIT(KSnoopLogFileH5,		"\\shared\\hcilogger\\hcilog_H5.log");

_LIT(KSnoopLogFileDefault,	"\\shared\\hcilogger\\hcilog_unknown.log");

#else

_LIT(KSnoopLogFileH1,		"e:\\shared\\hcilogger\\hcilog_H1.log");

_LIT(KSnoopLogFileH4,		"e:\\shared\\hcilogger\\hcilog_H4.log");

_LIT(KSnoopLogFileBCSP,		"e:\\shared\\hcilogger\\hcilog_Bcsp.log");

_LIT(KSnoopLogFileH5,		"e:\\shared\\hcilogger\\hcilog_H5.log");

_LIT(KSnoopLogFileDefault,	"e:\\shared\\hcilogger\\hcilog_unknown.log");

#endif	//__WINS__

#ifndef EKA2

GLDEF_C TInt E32Dll(TDllReason)

#else

GLDEF_C TInt E32Dll()

#endif

	{

	return KErrNone;

	}

CHCILoggerBtSnoop* CHCILoggerBtSnoop::NewLC()

	{

	CHCILoggerBtSnoop* self = new (ELeave) CHCILoggerBtSnoop;

	CleanupStack::PushL(self);

	self->ConstructL();

	return self;

	}

CHCILoggerBtSnoop::CHCILoggerBtSnoop()

	{

	}

void CHCILoggerBtSnoop::ConstructL()

	{

	iFileCloseTimer = CHCILoggerFileCloseTimer::NewL(iLogFile);

	for (TInt i = 0; i <= TInt(KHCILoggerControllerToHost | KHCILoggerCommandOrEvent); i++)

		{

		CHCILoggerBufferedFrame* temp = new(ELeave) CHCILoggerBufferedFrame;

		CleanupStack::PushL(temp);

		iBuffers.AppendL(temp); // array now "owns" temp

		CleanupStack::Pop(temp);

		}

	}

void CHCILoggerBtSnoop::DoInitialise(TInt aType)

	{

	iDatalinkType = aType;

	OpenFile(); // if it fails, just ignore it - try later when writing

	}

CHCILoggerBtSnoop::~CHCILoggerBtSnoop()

	{

	iBuffers.ResetAndDestroy();

	iLogFile.Close();

	iFs.Close();

	delete iFileCloseTimer;

	}

void CHCILoggerBtSnoop::LogFrame(TUint aFrameFlags, const TDesC8& aDesc)

	{

	TInt packetFlags = aFrameFlags & (KHCILoggerControllerToHost | KHCILoggerCommandOrEvent);

	CHCILoggerBufferedFrame* buffer = iBuffers[packetFlags];

	if (aFrameFlags & KHCILoggerFrameFragmented)

		{

		buffer->BufferData(aDesc);

		return;

		}

	TBtSnoopPacketRecord record;

	record.iOriginalLength = aDesc.Length();

	record.iIncludedLength = record.iOriginalLength;

	record.iPacketFlags = aFrameFlags;

	record.iCumulativeDrops = iCumulativeDrops;

	iCurrentTime.HomeTime();

	record.iTimestampMicroseconds = iCurrentTime.Int64();

	// if the file is not open, try to open it

	if (!iLogFile.SubSessionHandle())

		{

		if (OpenFile() != KErrNone)

			{

			return;

			}

		}

	record.iOriginalLength += buffer->OriginalLength();

	TDesC8& des = buffer->Buffer();

	if (buffer->OriginalLength() > des.Length())

		{ // some data lost

		record.iIncludedLength = des.Length();

		FileWriteRecord(record, des); 

		}

	else

		{ // no data lost

		record.iIncludedLength = record.iOriginalLength;

		FileWriteRecord(record, des, aDesc);

		}

	buffer->Reset();

	}

TInt CHCILoggerBtSnoop::OpenFile()

	{

	TPtrC fileName;

	switch (iDatalinkType)

		{

	case KHCILoggerDatalinkTypeH1:

		fileName.Set(KSnoopLogFileH1);

		break;

	case KHCILoggerDatalinkTypeH4:

		fileName.Set(KSnoopLogFileH4);

		break;

	case KHCILoggerDatalinkTypeBCSP:

		fileName.Set(KSnoopLogFileBCSP);

		break;

	case KHCILoggerDatalinkTypeH5:

		fileName.Set(KSnoopLogFileH5);

		break;

	default:

		fileName.Set(KSnoopLogFileDefault);

		break;

		};

	TInt err = KErrNone;

	if (!iFs.Handle())

	    {

        err = iFs.Connect();

        if (err)

            {

            return err;

            }

	    }

	err = iLogFile.Open(iFs, fileName, EFileWrite | EFileShareAny);

	if (err == KErrNotFound)

		{ // if it doesn't already exist, create it

		//Note that the potential KErrPathNotFound error is deliberately not handled, 

		//since the shared\hcilogger directory not being present is used to indicate 

		//that logging is not desired.

		err = iLogFile.Create(iFs, fileName, EFileWrite | EFileShareAny);

		}

	TInt size = 0;

	if (err == KErrNone)

		{

		err = iLogFile.Size(size);

		}

	if (err == KErrNone)

		{

		if (size < KSnoopLogFileHeaderSize)

			{

			err = FileWriteHeader(); // write will automatically start at pos 0,

			}						 // hence overwriting the file

		else

			{ // want to append the data to the current file

			TInt writePos = KSnoopLogFileHeaderSize; // KSnoopLogFileHeaderSize is const, so can't pass in Seek()

			iLogFile.Seek(ESeekEnd, writePos);

			}

		}

	if (err)

		{

		iLogFile.Close(); // just in case

		}

	return err;

	}

TInt CHCILoggerBtSnoop::FileWriteHeader()

	{

	TBuf8<KSnoopLogFileHeaderSize> buf;

	buf.Format(KSnoopLogFileHeaderFormat, KSnoopLogVersion, iDatalinkType);

	TInt err = iLogFile.Write(buf);

	iFileCloseTimer->ResetTimer();

	return err;

	}

void CHCILoggerBtSnoop::FileWriteRecord(const TBtSnoopPacketRecord& aRecord, const TDesC8& aBufferedData, const TDesC8& aNewData)

	{

	TBuf8<KSnoopLogRecordHeaderSize> buf;

	buf.Format(KSnoopLogRecordHeaderFormat, aRecord.iOriginalLength,

											aRecord.iIncludedLength,

											aRecord.iPacketFlags,

											aRecord.iCumulativeDrops,

											I64HIGH(aRecord.iTimestampMicroseconds),

											I64LOW(aRecord.iTimestampMicroseconds));

	// if these fail, just ignore them

	iLogFile.Write(buf);	// header

	iLogFile.Write(aBufferedData);	// data

	iLogFile.Write(aNewData);	// data

	iFileCloseTimer->ResetTimer();

	}

void CHCILoggerBtSnoop::FileWriteRecord(const TBtSnoopPacketRecord& aRecord, const TDesC8& aNewData)

	{

	FileWriteRecord(aRecord, KSnoopLogBlankDescriptor, aNewData);

	}

// CHCILoggerFileCloseTimer functions //

CHCILoggerFileCloseTimer* CHCILoggerFileCloseTimer::NewL(RFile& aLogFile)

	{

	CHCILoggerFileCloseTimer* self = new(ELeave) CHCILoggerFileCloseTimer(aLogFile);

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(self);

	return self;

	}

CHCILoggerFileCloseTimer::CHCILoggerFileCloseTimer(RFile& aLogFile)

: CTimer(EPriorityStandard), iLogFile(aLogFile)

	{

	}

void CHCILoggerFileCloseTimer::ConstructL()

	{

	CTimer::ConstructL();

	CActiveScheduler::Add(this);

	}

void CHCILoggerFileCloseTimer::ResetTimer()

	{

	if (IsActive())

		{

		Cancel();

		}

	After(TTimeIntervalMicroSeconds32(KHCILoggerFileCloseTime));

	}

void CHCILoggerFileCloseTimer::RunL()

	{

	iLogFile.Close();

	}

void CHCILoggerFileCloseTimer::DoCancel()

	{

	CTimer::DoCancel();

	}

CHCILoggerFileCloseTimer::~CHCILoggerFileCloseTimer()

	{

	Cancel();

	}

CHCILoggerBufferedFrame::CHCILoggerBufferedFrame()

	{

	iBuffer = HBufC8::New(0);

	}

CHCILoggerBufferedFrame::~CHCILoggerBufferedFrame()

	{

	delete iBuffer;

	}

void CHCILoggerBufferedFrame::BufferData(const TDesC8& aDesc)

	{

	if (iOriginalLength == iBuffer->Length())

		{ // then no allocations have failed so far

		TInt newLength = iOriginalLength + aDesc.Length();

		// add aDesc to buffer

		HBufC8* buf = iBuffer;

		if(buf != NULL)

			{

			if(newLength > buf->Des().MaxLength())

				{

				buf = buf->ReAlloc(newLength);

				}

			if(buf != NULL)

				{ // successful allocation

				buf->Des().Append(aDesc);

				iBuffer = buf;

				}

			// else if it failed, iBuffer stays the same

			}

		}

	iOriginalLength += aDesc.Length(); // add this on anyway

	}

void CHCILoggerBufferedFrame::Reset()

	{

	iBuffer->Des().Zero();

	iOriginalLength = 0;

	}

TInt CHCILoggerBufferedFrame::OriginalLength() const

	{

	return iOriginalLength;

	}

TDesC8& CHCILoggerBufferedFrame::Buffer() const

	{

	return *iBuffer;

	}