bluetooth/btstack/eirman/eirmansession.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 15 Jan 2010 08:13:17 +0200
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permissions -rw-r--r--
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// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// EIR Manager server session.
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// 
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//
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/**
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 @file
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 @internalComponent
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*/
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#include "eirmansession.h"
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#include <bluetooth/logger.h>
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#include <bluetooth/eirmanshared.h>
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#include <bttypes.h>
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#include <bluetooth/hci/hciconsts.h>
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#include "eirmanpanics.h"
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#include "eirmanserver.h"
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#ifdef __FLOG_ACTIVE
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_LIT8(KLogComponent, LOG_COMPONENT_EIRMANAGER);
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#endif
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CEirManSession* CEirManSession::NewL(CEirManServer& aServer)
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	{
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	LOG_STATIC_FUNC
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	CEirManSession* self = new(ELeave) CEirManSession(aServer);
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	CleanupStack::PushL(self);
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	self->ConstructL();
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	CleanupStack::Pop(self);
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	return self;
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	}
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CEirManSession::CEirManSession(CEirManServer& aServer)
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	: iEirManServer(aServer)
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	, iEirTag(EEirTagRESERVED)
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	{
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	LOG_FUNC
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	}
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void CEirManSession::ConstructL()
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	{
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	LOG_FUNC
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	iEirManServer.AddSession();
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	}
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CEirManSession::~CEirManSession()
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	{
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	LOG_FUNC
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	// deregister any registered tag that may be registered
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	DeregisterTag();
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	if(!iDataAvailableListenerMessage.IsNull())
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		{
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		// complete any outstanding messages.
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		iDataAvailableListenerMessage.Complete(KErrCancel);
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		}
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	iEirManServer.DropSession();
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	}
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void CEirManSession::ServiceL(const RMessage2& aMessage)
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	{
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	LOG_FUNC
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	LOG1(_L("CEirManSession::ServiceL aMessage.Function() = %d"), aMessage.Function());
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	TBool complete = ETrue;
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	TInt ret = KErrNone;
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	switch (aMessage.Function())
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		{
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	case EEirManRegisterTag:
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		complete = EFalse; // always async.
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		RegisterTag(aMessage);
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		break;
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	case EEirManSpaceAvailableNotification:
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		ret = RegisterSpaceAvailableListener(aMessage, complete);
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		break;
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	case EEirManCancelSpaceAvailableNotification:
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		ret = CancelSpaceAvailableListener();
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		break;
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	case EEirManSetData:
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		ret = SetData(aMessage);
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		break;
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	case EEirManNewData:
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		ret = NewData(aMessage);
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		break;
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	default:
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		aMessage.Panic(KEirManCliPncCat, EEirManPanicInvalidIPC);
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		break;
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		}
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	if (complete)
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		{
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		aMessage.Complete(ret);
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		}
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	}
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void CEirManSession::RegisterTag(const RMessage2& aMessage)
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	{
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	LOG_FUNC
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	TEirTag tag = static_cast<TEirTag>(aMessage.Int0());
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	LOG1(_L("CEirManSession::RegisterTag tag = %d"), tag);
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	if(!(tag >= EEirTagName && tag < EEirTagRESERVED))
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		{
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		__ASSERT_ALWAYS(EFalse, aMessage.Panic(KEirManCliPncCat, EEirManPanicInvalidTag));
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		}
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	else if(iEirTag != EEirTagRESERVED)
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		{
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		LOG1(_L("CEirManSession::RegisterTag ERROR, Tag in use: %d"), iEirTag);
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		aMessage.Complete(KErrInUse);
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		}
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	else
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		{
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		// Register this tag for callbacks
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		if(iEirManServer.EirFeatureState() == EEirFeatureReady)
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			{
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			// Eir is supported
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			TInt result = iEirManServer.EirManager().RegisterTag(tag, *this);
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			if(result == KErrNone)
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				{
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				iEirTag = tag;
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				}
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			aMessage.Complete(result);
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			}
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		else if(iEirManServer.EirFeatureState() == EEirFeaturePending)
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			{
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			// We don't know if eir is supported or not at this moment
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			iPendingEirTag = tag;
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			iRegisterMessage = aMessage;
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			}
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		else
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			{
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			// Eir is not supported
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			aMessage.Complete(KErrNotSupported);
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			}
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		}
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	}
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void CEirManSession::DeregisterTag()
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	{
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	LOG_FUNC
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	LOG1(_L("CEirManSession::DeregisterTag tag = %d"), iEirTag);
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	if(iEirTag != EEirTagRESERVED)
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		{
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		// Deregister this tag for callbacks 
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		iEirManServer.EirManager().DeregisterTag(iEirTag);
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		iEirTag = EEirTagRESERVED;
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		}
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	}
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   167
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// Eir Server has tried to register tag
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void CEirManSession::NotifyEirFeatureState(TInt aResult)
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	{
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	LOG1(_L("Eir Server has been notified feature ready, result: %d"), aResult);
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	if(aResult == KErrNone && !iRegisterMessage.IsNull())
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		{
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		__ASSERT_DEBUG(iEirManServer.EirFeatureState() == EEirFeatureReady, EIR_SESSION_PANIC(EEirSessionEirFeatureNotSupported));
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		TInt result = iEirManServer.EirManager().RegisterTag(iPendingEirTag, *this);
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		if(result == KErrNone)
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			{
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			iEirTag = iPendingEirTag;
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			}
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		iRegisterMessage.Complete(result);
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		}
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	else if(!iRegisterMessage.IsNull())
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		{
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		iRegisterMessage.Complete(aResult);
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		}
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	}
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TInt CEirManSession::RegisterSpaceAvailableListener(const RMessage2& aMessage, TBool& aComplete)
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	{
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	LOG_FUNC
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	if(iDataAvailableListenerMessage.Handle())
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		{
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		LOG(_L("CEirManSession:::RegisterSpaceAvailableListener ERROR IN USE"));
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		return KErrInUse;
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		}
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   197
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	iDataAvailableListenerMessage = aMessage;
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   199
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	aComplete = EFalse;
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   201
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	if(iLastSpaceOffered != 0)
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		{
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		LOG(_L("cached space present, completing immediately"));
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		CompleteSpaceAvailableRequest(iLastSpaceOffered);
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		iLastSpaceOffered = 0;
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		return KErrNone;
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		}
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   209
	
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	LOG(_L("waiting for callback..."));
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	return KErrNone;
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	}
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   213
	
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TInt CEirManSession::NewData(const RMessage2& aMessage)
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	{
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	LOG_FUNC
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	__ASSERT_ALWAYS(iEirTag != EEirTagRESERVED, aMessage.Panic(KEirManCliPncCat, EEirManPanicInvalidTag));
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	TInt requiredLength = static_cast<TInt>(aMessage.Int0());
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	return iEirManServer.EirManager().NewData(iEirTag, requiredLength);
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	}
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   222
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TInt CEirManSession::CancelSpaceAvailableListener()
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	{
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	LOG_FUNC
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	if(!iDataAvailableListenerMessage.Handle())
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		{
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		return KErrNotFound;
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		}
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	iDataAvailableListenerMessage.Complete(KErrCancel);
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	return KErrNone;
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	}
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TInt CEirManSession::SetData(const RMessage2& aMessage)
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	{
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	LOG_FUNC
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	__ASSERT_ALWAYS(iEirTag != EEirTagRESERVED, aMessage.Panic(KEirManCliPncCat, EEirManPanicInvalidTag));
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	TEirDataMode eirDataMode = static_cast<TEirDataMode>(aMessage.Int1());
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	LOG2(_L("Tag: %d EirDataMode: %d"), iEirTag, eirDataMode);
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	// No need to allocate memory with an expensive malloc() call (via HBuf8::NewL or whatever), 
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	// since the EIR contents fit in the stack, and the EIR Manager will cache the data anyway
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	TBuf8<KHCIExtendedInquiryResponseMaxLength> data;
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	TInt err = aMessage.Read(0, data);
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	if(err == KErrNone)
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		{
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		err = iEirManServer.EirManager().SetData(iEirTag, data, eirDataMode);
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		}
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	return err;
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	}
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// Callback from the EIR Manager
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void CEirManSession::MemnEirBlockAvailable(TEirTag aTag, TUint aSpaceForTag)
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	{
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	LOG_FUNC
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	LOG2(_L("CEirManSession::MemnEirBlockAvailable Tag: %d space: %d"), aTag, aSpaceForTag);
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	// Silently discard callbacks not containing our EIR Tag
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	if(aTag != iEirTag)
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		{
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		__ASSERT_DEBUG(EFalse, EIR_SESSION_PANIC(EEirSessionInvalidEirTag));
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		LOG3(_L("CEirManSession::MemnEirBlockAvailable early return: aTag: %d iEirTag: %d space: %d"), aTag, iEirTag, aSpaceForTag);
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		return;
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		}
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	if(iDataAvailableListenerMessage.Handle())
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		{
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		LOG(_L("Listener outstanding, completing request"));
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		// Clear stored value
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		iLastSpaceOffered = 0;
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		CompleteSpaceAvailableRequest(aSpaceForTag);
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		}
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	else
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		{
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		LOG(_L("NO Listener outstanding, storing space"));
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		// Store in case a client registers later. If this happens multiple times, only the last one will be remembered
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		iLastSpaceOffered = aSpaceForTag;
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		}
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	}
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void CEirManSession::CompleteSpaceAvailableRequest(TUint aBytesAvailable)
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	{
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	LOG_FUNC
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	LOG1(_L("CEirManSession::CompleteSpaceAvailableRequest bytes: %d"), aBytesAvailable);
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	// Offer the space to the client
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	TPckg<TUint32> pckg(aBytesAvailable);
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	TInt err = iDataAvailableListenerMessage.Write(0, pckg);
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	iDataAvailableListenerMessage.Complete(err);
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	}
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