13 // Description:

    13 // Description:

    14 //

    14 //

    15 

    15 

    16 #include "SqlBur.h"

    16 #include "SqlBur.h"

    17 #include "SqlAssert.h"

    17 #include "SqlAssert.h"

    19 

    25 

    20 //Extracts and returns 32-bit integer from aNumBuf buffer.

    26 //Extracts and returns 32-bit integer from aNumBuf buffer.

    21 static TUint32 GetNumUint32L(const TDesC& aNumBuf)

    27 static TUint32 GetNumUint32L(const TDesC& aNumBuf)

    22 	{

    28 	{

    23 	TLex lex(aNumBuf);

    29 	TLex lex(aNumBuf);

    24 	lex.SkipSpace();

    30 	lex.SkipSpace();

    25 	TUint32 num = 0xFFFFFFFF;

    31 	TUint32 num = 0xFFFFFFFF;

    27 	return num;

    33 	return num;

    28 	}

    34 	}

    29 

    35 

    30 //Extracts and returns 64-bit integer from aNumBuf buffer.

    36 //Extracts and returns 64-bit integer from aNumBuf buffer.

    31 static TInt64 GetNumInt64L(const TDesC& aNumBuf)

    37 static TInt64 GetNumInt64L(const TDesC& aNumBuf)

    32 	{

    38 	{

    33 	TLex lex(aNumBuf);

    39 	TLex lex(aNumBuf);

    34 	lex.SkipSpace();

    40 	lex.SkipSpace();

    35 	TInt64 num = -1;

    41 	TInt64 num = -1;

    37 	return num;

    43 	return num;

    38 	}

    44 	}

    39 

    45 

    40 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////

    46 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////

    41 

    47 

    55 CSqlBackupClient* CSqlBackupClient::NewLC(MSqlSrvBurInterface *aInterface)

    61 CSqlBackupClient* CSqlBackupClient::NewLC(MSqlSrvBurInterface *aInterface)

    56 	{

    62 	{

    57 	CSqlBackupClient *self=(CSqlBackupClient *)new(ELeave) CSqlBackupClient(aInterface);

    63 	CSqlBackupClient *self=(CSqlBackupClient *)new(ELeave) CSqlBackupClient(aInterface);

    58 	CleanupStack::PushL(self);

    64 	CleanupStack::PushL(self);

    59 	self->ConstructL();

    65 	self->ConstructL();

    60 	return self;

    67 	return self;

    61 	}

    68 	}

    62 

    69 

    63 /** Standard two phase construction

    70 /** Standard two phase construction

    64 	@return an instance of the backup client

    71 	@return an instance of the backup client

    84 

    91 

    85 /** Usual tidy up

    92 /** Usual tidy up

    86 */

    93 */

    87 CSqlBackupClient::~CSqlBackupClient()

    94 CSqlBackupClient::~CSqlBackupClient()

    88 	{

    95 	{

    89 	// cancel outstanding requests

    98 	// cancel outstanding requests

    90 	Cancel();

    99 	Cancel();

    91 	

   100 	

    92 	// release the pub/sub property

   101 	// release the pub/sub property

    93 	iBurProperty.Close();

   102 	iBurProperty.Close();

   128 

   137 

   129 /** Not implemented

   138 /** Not implemented

   130 	@return a flag indicating whether we actioned the error

   139 	@return a flag indicating whether we actioned the error

   131 	@param the error unused

   140 	@param the error unused

   132 */

   141 */

   135 	// just satisfy it that we did something!

   146 	// just satisfy it that we did something!

   136 	return KErrNone;

   147 	return KErrNone;

   137 	}

   148 	}

   138 

   149 

   139 /**	Kick off the BUR client

   150 /**	Kick off the BUR client

   147 

   158 

   148 /** Resubscribe and wait for events

   159 /** Resubscribe and wait for events

   149 */	

   160 */	

   150 void CSqlBackupClient::NotifyChange()

   161 void CSqlBackupClient::NotifyChange()

   151 	{

   162 	{

   152 	iBurProperty.Subscribe(iStatus);

   164 	iBurProperty.Subscribe(iStatus);

   153 	SetActive();

   165 	SetActive();

   154 	}

   166 	}

   155 

   167 

   156 /** Something happened. Find out what.

   168 /** Something happened. Find out what.

   159 	This is for performance reasons

   171 	This is for performance reasons

   160 	@leave if ConfirmReadyForBURL leaves

   172 	@leave if ConfirmReadyForBURL leaves

   161 */

   173 */

   162 void CSqlBackupClient::TestBurStatusL()

   174 void CSqlBackupClient::TestBurStatusL()

   163 	{

   175 	{

   164 	TInt status;

   177 	TInt status;

   166 		{

   180 		{

   167 		status&=KBURPartTypeMask;

   181 		status&=KBURPartTypeMask;

   168 		switch(status)

   187 		switch(status)

   169 			{

   188 			{

   170 			case EBURUnset: // same as EBURNormal

   189 			case EBURUnset: // same as EBURNormal

   171 			case EBURNormal:

   190 			case EBURNormal:

   172 				delete iActiveBackupClient;

   191 				delete iActiveBackupClient;

   182 					iActiveBackupClient=CActiveBackupClient::NewL(this);

   201 					iActiveBackupClient=CActiveBackupClient::NewL(this);

   183 					}

   202 					}

   184 				iActiveBackupClient->ConfirmReadyForBURL(KErrNone);

   203 				iActiveBackupClient->ConfirmReadyForBURL(KErrNone);

   185 				break;

   204 				break;

   186 			default:

   205 			default:

   188 			}

   207 			}

   189 		}

   208 		}

   190 	}

   210 	}

   191 

   211 

   192 /** Called when BUE notifies a BUR event

   212 /** Called when BUE notifies a BUR event

   193 	@leave if TestBurStatusL leaves

   213 	@leave if TestBurStatusL leaves

   194 */

   214 */

   207 	supposed to allow the BUE to optimise its behaviour by know up front

   227 	supposed to allow the BUE to optimise its behaviour by know up front

   208 	the data volume.

   228 	the data volume.

   209 	@return an arbitrary number

   229 	@return an arbitrary number

   210 	@param TDrive unused

   230 	@param TDrive unused

   211 */

   231 */

   214 	// we have no idea at this point - we even don't know who is to be backed up yet

   235 	// we have no idea at this point - we even don't know who is to be backed up yet

   215 	const TUint KArbitraryNumber = 1024;

   236 	const TUint KArbitraryNumber = 1024;

   216 	return KArbitraryNumber;

   238 	return KArbitraryNumber;

   217 	}

   239 	}

   218 

   240 

   219 /** This is the backup state machine

   241 /** This is the backup state machine

   220 	Because the data has to be sent back in sections and the various

   242 	Because the data has to be sent back in sections and the various

   225 	@param TBool set to true when all data has been submitted for backup

   247 	@param TBool set to true when all data has been submitted for backup

   226 	@leave

   248 	@leave

   227 */

   249 */

   228 void CSqlBackupClient::GetBackupDataSectionL(TPtr8& aBuffer, TBool& aFinishedFlag)

   250 void CSqlBackupClient::GetBackupDataSectionL(TPtr8& aBuffer, TBool& aFinishedFlag)

   229 	{

   251 	{

   230 	// don't assume they set it to false

   253 	// don't assume they set it to false

   231 	aFinishedFlag=EFalse;

   254 	aFinishedFlag=EFalse;

   232 	// any files to backup

   255 	// any files to backup

   233 	if(iFileList.Count()==0)

   256 	if(iFileList.Count()==0)

   234 		{

   257 		{

   235 		// nothing to backup - just return the finished flag

   259 		// nothing to backup - just return the finished flag

   236 		aFinishedFlag=ETrue;

   260 		aFinishedFlag=ETrue;

   237 		// clear down the list

   261 		// clear down the list

   238 		iFileList.Reset();

   262 		iFileList.Reset();

   239 		// iFileList closed in dtor

   263 		// iFileList closed in dtor

   240 		return;

   264 		return;

   241 		}

   265 		}

   243 	// run the state machine

   267 	// run the state machine

   244 	for(TInt bufFreeSpace=aBuffer.MaxSize()-aBuffer.Size(); bufFreeSpace>0; bufFreeSpace=aBuffer.MaxSize()-aBuffer.Size())

   268 	for(TInt bufFreeSpace=aBuffer.MaxSize()-aBuffer.Size(); bufFreeSpace>0; bufFreeSpace=aBuffer.MaxSize()-aBuffer.Size())

   245 		{

   269 		{

   246 		switch(iState)

   270 		switch(iState)

   247 			{

   271 			{

   248 			case EBackupNoFileOpen: // open a file for processing

   272 			case EBackupNoFileOpen: // open a file for processing

   249 				{

   273 				{

   250 				if(iFileIndex>=iFileList.Count())

   274 				if(iFileIndex>=iFileList.Count())

   251 					{

   275 					{

   252 					// all files have been processed - send the finished flag

   277 					// all files have been processed - send the finished flag

   253 					aFinishedFlag=ETrue;

   278 					aFinishedFlag=ETrue;

   254 					// clear down the filelist

   279 					// clear down the filelist

   255 					iFileList.Reset();

   280 					iFileList.Reset();

   256 					return;

   281 					return;

   257 					}

   282 					}

   258 				// open the database file to send

   283 				// open the database file to send

   259 				TInt rc=iFile.Open(	iInterface->Fs(), iFileList[iFileIndex].FullName(), EFileRead | EFileShareExclusive);

   284 				TInt rc=iFile.Open(	iInterface->Fs(), iFileList[iFileIndex].FullName(), EFileRead | EFileShareExclusive);

   260 				if(KErrNone!=rc)

   287 				if(KErrNone!=rc)

   261 					{

   288 					{

   262 					// there's nothing we can do if we can't open the file so we just skip it

   289 					// there's nothing we can do if we can't open the file so we just skip it

   263 					++iFileIndex;

   290 					++iFileIndex;

   264 					break;

   291 					break;

   288 					KMagicNum,					// %8x

   315 					KMagicNum,					// %8x

   289 					KBackupHeaderVersion,		// %4x

   316 					KBackupHeaderVersion,		// %4x

   290 					fileSize,					// %16lx

   317 					fileSize,					// %16lx

   291 					fileName.Length(),			// %8x

   318 					fileName.Length(),			// %8x

   292 					&fileName);					// %S

   319 					&fileName);					// %S

   293 				

   321 				

   294 				// we need it to look like an 8bit buffer

   322 				// we need it to look like an 8bit buffer

   295 				TPtr8 hdrPtr8((TUint8*)iBuffer.Ptr(), iBuffer.Size(), iBuffer.Size());

   323 				TPtr8 hdrPtr8((TUint8*)iBuffer.Ptr(), iBuffer.Size(), iBuffer.Size());

   296 							

   324 							

   297 				TInt len = Min(hdrPtr8.Size(), bufFreeSpace);

   325 				TInt len = Min(hdrPtr8.Size(), bufFreeSpace);

   355 					}

   383 					}

   356 				break;

   384 				break;

   357 				}

   385 				}

   358 			case EBackupEndOfFile:

   386 			case EBackupEndOfFile:

   359 				{

   387 				{

   360 				iFile.Close();

   389 				iFile.Close();

   361 				++iFileIndex; // move on to next file

   390 				++iFileIndex; // move on to next file

   362 				iState = EBackupNoFileOpen; // go round again

   391 				iState = EBackupNoFileOpen; // go round again

   363 				break;

   392 				break;

   364 				}

   393 				}

   372 

   401 

   373 /** This is called by BUE when the restore has completed

   402 /** This is called by BUE when the restore has completed

   374 	Nothing to do here except tell the server

   403 	Nothing to do here except tell the server

   375 	@param TDrive the drive that is being restored (unused)

   404 	@param TDrive the drive that is being restored (unused)

   376 */

   405 */

   379 	}

   410 	}

   380 

   411 

   381 /** This is called to let us know that the given SID is to be backed up

   412 /** This is called to let us know that the given SID is to be backed up

   382 	We ask the SQL server for a list of databases that want to be backed

   413 	We ask the SQL server for a list of databases that want to be backed

   383 	up - this is because the backup flag is an internal metadata object

   414 	up - this is because the backup flag is an internal metadata object

   385 	this data is stored.

   416 	this data is stored.

   386 	@param TSecureSid the UID of the application to backup

   417 	@param TSecureSid the UID of the application to backup

   387 	@param TDriveNumber the drive to be backed up (unused)

   418 	@param TDriveNumber the drive to be backed up (unused)

   388 	@leave

   419 	@leave

   389 */

   420 */

   392 	// get the list of database files to back up - this is provided by the SQL server

   425 	// get the list of database files to back up - this is provided by the SQL server

   393 	GetBackupListL(aSid);

   426 	GetBackupListL(aSid);

   394 	// this is the index of the file being processed - point to the beginning

   427 	// this is the index of the file being processed - point to the beginning

   395 	iFileIndex=0;

   428 	iFileIndex=0;

   396 	// the first state of the backup state machine

   429 	// the first state of the backup state machine

   402 /** Called when the BUE wants to start sending data to us

   435 /** Called when the BUE wants to start sending data to us

   403 	@param TSecureId the UID of the application that is to be restored

   436 	@param TSecureId the UID of the application that is to be restored

   404 	@param TDriveNumber the drive to restore (unused)

   437 	@param TDriveNumber the drive to restore (unused)

   405 	@leave

   438 	@leave

   406 */

   439 */

   409 	iBuffer.Zero();

   444 	iBuffer.Zero();

   410 	// this is the first state of the restore state machine

   445 	// this is the first state of the restore state machine

   411 	iState=ERestoreExpectChecksum;

   446 	iState=ERestoreExpectChecksum;

   412 	iAnyData=EFalse; // to keep track in the state machine whether any data was actually sent

   447 	iAnyData=EFalse; // to keep track in the state machine whether any data was actually sent

   413 	// save the sid for notifying the server when the restore is done

   448 	// save the sid for notifying the server when the restore is done

   424 Attention!!! This function won't work properly if aInBuffer parameter contains odd number of bytes!!!

   459 Attention!!! This function won't work properly if aInBuffer parameter contains odd number of bytes!!!

   425 (a legacy problem, if it is a problem at all, because the B&R engine probably sends the data in chunks with even size)

   460 (a legacy problem, if it is a problem at all, because the B&R engine probably sends the data in chunks with even size)

   426 */

   461 */

   427 void CSqlBackupClient::RestoreBaseDataSectionL(TDesC8& aInBuffer, TBool aFinishedFlag)

   462 void CSqlBackupClient::RestoreBaseDataSectionL(TDesC8& aInBuffer, TBool aFinishedFlag)

   428 	{

   463 	{

   429 	// used to walk the buffer

   465 	// used to walk the buffer

   430 	// got a new buffer - because each time this method is called, we have a

   466 	// got a new buffer - because each time this method is called, we have a

   431 	// fresh chunk of data

   467 	// fresh chunk of data

   432 	TInt inBufferPos = 0;

   468 	TInt inBufferPos = 0;

   433 

   469 

   524 					{

   560 					{

   525 					iFileSize = GetNumInt64L(iBuffer);	

   561 					iFileSize = GetNumInt64L(iBuffer);	

   526 					iState = ERestoreExpectFileNameSize;

   562 					iState = ERestoreExpectFileNameSize;

   527 					iBuffer.Zero();

   563 					iBuffer.Zero();

   528 					}

   564 					}

   529 				break;

   566 				break;

   530 				}

   567 				}

   531 			case ERestoreExpectFileNameSize: // the size of the file name to restore

   568 			case ERestoreExpectFileNameSize: // the size of the file name to restore

   532 				{

   569 				{

   533 				const TInt KFileNameLenStrLen = 8;

   570 				const TInt KFileNameLenStrLen = 8;

   541 				break;

   578 				break;

   542 				}

   579 				}

   543 			case ERestoreExpectFileName:  // the name of the file to restore

   580 			case ERestoreExpectFileName:  // the name of the file to restore

   544 				{

   581 				{

   545 				CopyBufData(aInBuffer, inBufferPos, iBuffer, iFileNameSize);

   582 				CopyBufData(aInBuffer, inBufferPos, iBuffer, iFileNameSize);

   546 				if(iBuffer.Length() == iFileNameSize)

   584 				if(iBuffer.Length() == iFileNameSize)

   547 					{

   585 					{

   548 					iState = ERestoreExpectData;

   586 					iState = ERestoreExpectData;

   549 					iBuffer.Append(KRestoreSuffix);

   587 					iBuffer.Append(KRestoreSuffix);

   550 					// now we start writing the data to the target file

   588 					// now we start writing the data to the target file

   551 					// write to a temp - double disk space potentially

   589 					// write to a temp - double disk space potentially

   552 					// once all the temp files are created, then they are renamed to the

   590 					// once all the temp files are created, then they are renamed to the

   553 					// real file names in one fell swoop

   591 					// real file names in one fell swoop

   554 					__SQLLEAVE_IF_ERROR(iFile.Replace(iInterface->Fs(), iBuffer, EFileWrite | EFileShareExclusive));

   592 					__SQLLEAVE_IF_ERROR(iFile.Replace(iInterface->Fs(), iBuffer, EFileWrite | EFileShareExclusive));

   555 					iBuffer.Zero();

   594 					iBuffer.Zero();

   556 					}

   595 					}

   557 				break;

   596 				break;

   558 				}

   597 				}

   559 			case ERestoreExpectData: // now for the data

   598 			case ERestoreExpectData: // now for the data

   572 				{

   611 				{

   573 				// calculate the checksum

   612 				// calculate the checksum

   574 				TUint32 cksum = CheckSumL(iFile) & KMaxTUint32;

   613 				TUint32 cksum = CheckSumL(iFile) & KMaxTUint32;

   575 				

   614 				

   576 				// done with the file now - has to follow checksum cos it

   615 				// done with the file now - has to follow checksum cos it

   579 				iFile.Close();

   619 				iFile.Close();

   580 

   620 

   581                 // validate that the checksum matches

   621                 // validate that the checksum matches

   582                 if(cksum!=iChecksum)

   622                 if(cksum!=iChecksum)

   583                     {

   623                     {

   606 						// first, rename the orig .db as .bak just in case

   646 						// first, rename the orig .db as .bak just in case

   607 						// ok if not found - might have been deleted.

   647 						// ok if not found - might have been deleted.

   608 						//the ".bak" file, if exists, will be deleted first.

   648 						//the ".bak" file, if exists, will be deleted first.

   609 						(void)iInterface->Fs().Delete(bak);

   649 						(void)iInterface->Fs().Delete(bak);

   610 						TInt err=iInterface->Fs().Rename(db,bak);

   650 						TInt err=iInterface->Fs().Rename(db,bak);

   611 						if(err == KErrNone || err == KErrNotFound)

   652 						if(err == KErrNone || err == KErrNotFound)

   612 							{

   653 							{

   613 							// now, rename the .rst as .db

   654 							// now, rename the .rst as .db

   614 							err = iInterface->Fs().Rename(rst,db);

   655 							err = iInterface->Fs().Rename(rst,db);

   615 							}

   656 							}

   618 							//The idea here is to not report the error immediatelly by calling LeaveIfError().

   659 							//The idea here is to not report the error immediatelly by calling LeaveIfError().

   619 							//If we leave here, the next database restore may also fail, for example, if the current database is still open by 

   660 							//If we leave here, the next database restore may also fail, for example, if the current database is still open by 

   620 							//its owner. Then "TInt err=iInterface->Fs().Rename(db,bak);" will fail again.

   661 							//its owner. Then "TInt err=iInterface->Fs().Rename(db,bak);" will fail again.

   621 							err2 = err;

   662 							err2 = err;

   622 							}

   663 							}

   624 						// if we got here, we have a backup of the original database in .db.bak

   664 						// if we got here, we have a backup of the original database in .db.bak

   625 						// and the new database in .db

   665 						// and the new database in .db

   626 						}//end of for(...)

   666 						}//end of for(...)

   627 					__SQLLEAVE_IF_ERROR(err2);

   667 					__SQLLEAVE_IF_ERROR(err2);

   628 					

   668 					

   635 					// we do this here and not part of the earlier loop

   675 					// we do this here and not part of the earlier loop

   636 					// because we want to make sure that we have a coherent set of database

   676 					// because we want to make sure that we have a coherent set of database

   637 					// files that belong together and not bits of old and new

   677 					// files that belong together and not bits of old and new

   638 					__SQLLEAVE_IF_ERROR(iInterface->Fs().GetDir(KBackupFilter,KEntryAttNormal,ESortNone,dir));

   678 					__SQLLEAVE_IF_ERROR(iInterface->Fs().GetDir(KBackupFilter,KEntryAttNormal,ESortNone,dir));

   639 					CleanupStack::PushL(dir);

   679 					CleanupStack::PushL(dir);

   640 					for(TInt a1=0;a1<dir->Count();++a1)

   681 					for(TInt a1=0;a1<dir->Count();++a1)

   641 						{

   682 						{

   642 						TEntry entry=(*dir)[a1];

   683 						TEntry entry=(*dir)[a1];

   643 						TPtrC bak=entry.iName.Des();

   684 						TPtrC bak=entry.iName.Des();

   644 						__SQLLEAVE_IF_ERROR(iInterface->Fs().Delete(bak));

   685 						__SQLLEAVE_IF_ERROR(iInterface->Fs().Delete(bak));

   673 	{

   714 	{

   674 	// backup/restore terminated, try to tidy up! Can't leave, can't Panic!!!!!

   715 	// backup/restore terminated, try to tidy up! Can't leave, can't Panic!!!!!

   675 	// rename all the .bak files to .db

   716 	// rename all the .bak files to .db

   676 	CDir *dir=NULL;

   717 	CDir *dir=NULL;

   677 	TInt rc=iInterface->Fs().GetDir(KBackupFilter,KEntryAttNormal,ESortNone,dir);

   718 	TInt rc=iInterface->Fs().GetDir(KBackupFilter,KEntryAttNormal,ESortNone,dir);

   678 	if(KErrNone!=rc)

   720 	if(KErrNone!=rc)

   679 		{

   721 		{

   680 		// can't get a file list - can't do anything

   722 		// can't get a file list - can't do anything

   681 		return;

   723 		return;

   682 		}

   724 		}

   693 			}

   735 			}

   694         //The function cannot leave or return an error. The only thing which could be done here is to print out something

   736         //The function cannot leave or return an error. The only thing which could be done here is to print out something

   695 		//and continue with the next file.

   737 		//and continue with the next file.

   696 		if(KErrNone != rc)

   738 		if(KErrNone != rc)

   697 		    {

   739 		    {

   699 		    }

   741 		    }

   700 		// backup restored ok

   742 		// backup restored ok

   701 		}

   743 		}

   702 	// cleanup dir

   744 	// cleanup dir

   703 	delete dir;

   745 	delete dir;

   781 	@leave

   823 	@leave

   782 	@param TSecureSid the UID of the data owner

   824 	@param TSecureSid the UID of the data owner

   783 */

   825 */

   784 void CSqlBackupClient::GetBackupListL(TSecureId aSid)

   826 void CSqlBackupClient::GetBackupListL(TSecureId aSid)

   785 	{

   827 	{

   786 	// we own the array - the SQL server just populates it

   829 	// we own the array - the SQL server just populates it

   787 	iInterface->GetBackUpListL(aSid,iFileList);

   830 	iInterface->GetBackUpListL(aSid,iFileList);

   788 	}

   831 	}

   789 

   832 

   790 /** A simple checksumming algorithm to allow a degree

   833 /** A simple checksumming algorithm to allow a degree

   841 //otherwise CopyBufData() will copy as much characters as possible (in which case RestoreBaseDataSectionL() will

   884 //otherwise CopyBufData() will copy as much characters as possible (in which case RestoreBaseDataSectionL() will

   842 //stay in the same state, waiting for more data from the B&R server).

   885 //stay in the same state, waiting for more data from the B&R server).

   843 //

   886 //

   844 void CSqlBackupClient::CopyBufData(const TDesC8& aInBuf, TInt& aInBufReadPos, TDes& aOutBuf, TInt aDataLen)

   887 void CSqlBackupClient::CopyBufData(const TDesC8& aInBuf, TInt& aInBufReadPos, TDes& aOutBuf, TInt aDataLen)

   845 	{

   888 	{

   849 	

   892 	

   850 	TInt needed = (aDataLen - aOutBuf.Length()) << K8to16bitShift;

   893 	TInt needed = (aDataLen - aOutBuf.Length()) << K8to16bitShift;

   851 	TInt available = aInBuf.Size() - aInBufReadPos;

   894 	TInt available = aInBuf.Size() - aInBufReadPos;

   852 	TInt len = Min(needed, available);

   895 	TInt len = Min(needed, available);

   853 	TPtrC8 ptr8 = aInBuf.Mid(aInBufReadPos, len);

   896 	TPtrC8 ptr8 = aInBuf.Mid(aInBufReadPos, len);