bluetooth/btstack/avdtp/avdtpSEPCache.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 15 Jan 2010 08:13:17 +0200
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// Copyright (c) 2003-2009 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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// Implements the avdtp SEP cache
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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 <bluetooth/logger.h>
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#include <bluetoothav.h>
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#include "avdtpSEPCache.h"
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#include "gavdpinterface.h"
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#include "avdtpSignallingMessages.h"
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#include "avdtputil.h"
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#ifdef __FLOG_ACTIVE
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_LIT8(KLogComponent, LOG_COMPONENT_AVDTP);
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#endif
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CRemoteSEP* CRemoteSEP::NewL(const TBTDevAddr& aAddr, const TAvdtpSEPInfo& aInfo)
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	{
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	LOG_STATIC_FUNC
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	CRemoteSEP* s = new (ELeave) CRemoteSEP(aAddr, aInfo);
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	CleanupStack::PushL(s);
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	s->ConstructL();
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	CleanupStack::Pop(s);
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	return s;
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	}
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CRemoteSEP::CRemoteSEP(const TBTDevAddr& aAddr, const TAvdtpSEPInfo& aInfo)
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: iRemoteDev(aAddr), iInfo(aInfo)
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	{
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	LOG_FUNC
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	// age already set to zero
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	 // only store remote sep details in the cache
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	__ASSERT_DEBUG(!aInfo.SEID().IsLocal(), Panic(EAvdtpSEIDHasWrongDomain));
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	}
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CRemoteSEP::~CRemoteSEP()
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	{
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	LOG_FUNC
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	delete iCapabilitiesBuf;
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	}
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void CRemoteSEP::ConstructL()
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	{
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	LOG_FUNC
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	}
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void CRemoteSEP::UpdateInfo(const TAvdtpSEPInfo& aInfo)
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	{
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	iInfo = aInfo;
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	}
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TBool CRemoteSEP::HasCapability(TAvdtpServiceCategory aCat)
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	{
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	LOG_FUNC
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	TBool ret = EFalse;
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	if (iCapabilitiesBuf)
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		{
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		CCapabilityPresentVisitor* presVisitor = new CCapabilityPresentVisitor(aCat);
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		if (presVisitor)
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			{
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			TPtr8 ptr = iCapabilitiesBuf->Des();
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			presVisitor->Process(ptr);
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			ret = presVisitor->IsPresent();
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			delete presVisitor;
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			}
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		}
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	return ret;
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	}
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/*
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Returns a pointer descriptor to SEP capability *in the protocol domain*
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It is upto a client to get this parsed as needed
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Motivation - to push more easilythrough ESOCK AND save unneccasry parsing
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*/
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TPtrC8 CRemoteSEP::GetCapabilityL(TAvdtpServiceCategory aCat)
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	{
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	LOG_FUNC
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	// use visitor to extract relevant bit
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	CCapabilityExtractorVisitor* extractor = new (ELeave) CCapabilityExtractorVisitor(aCat);
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	TPtr8 ptr = iCapabilitiesBuf->Des();
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	extractor->Process(ptr);
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	TPtrC8 cap = extractor->GetCapability();
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	delete extractor;
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	return cap;
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	}
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void CRemoteSEP::SetCapabilities(HBufC8* aCapsAsProtocol)
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	{
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	LOG_FUNC
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	delete iCapabilitiesBuf;
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	iCapabilitiesBuf = aCapsAsProtocol; // takes ownership
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   115
	
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	// set a visitor on it now to summarise caps
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	CCapabilitySummaryVisitor* summariser = new CCapabilitySummaryVisitor;
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	if (summariser)
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		{
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		TPtr8 des = iCapabilitiesBuf->Des();
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		summariser->Process(des);
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		iKnownCaps = summariser->CapabilitiesPresent();
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		delete summariser;
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		}
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	}
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CRemoteSEPCache* CRemoteSEPCache::NewL()
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	{
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	LOG_STATIC_FUNC
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	CRemoteSEPCache* s = new (ELeave) CRemoteSEPCache();
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	return s;	
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	}
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   133
	
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/**
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Modifies SEP if already exists
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*/
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TInt CRemoteSEPCache::AddSEP(const TBTDevAddr& aAddr, const TAvdtpSEPInfo& aInfo)
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	{
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	LOG_FUNC
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	TInt err = KErrNone;
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   141
	
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	CRemoteSEP* sep = FindSEP(aAddr, aInfo.SEID());
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	if (!sep)
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		{
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		TRAP(err, sep = CRemoteSEP::NewL(aAddr, aInfo));
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		if (!err)
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			{
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			err = iRemoteSEPs.Append(sep);
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			if (err)
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	        	{
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	       	    delete sep;
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	        	}
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			}
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		}
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	else
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		{
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		// modify the one there
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		sep->UpdateInfo(aInfo);
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		}
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	return err;
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	}
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   162
	
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TPtrC8 CRemoteSEPCache::GetCapabilityL(const TBTDevAddr& aAddr, TSEID aSEID, TAvdtpServiceCategory aCat)
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	{
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	LOG_FUNC
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	CRemoteSEP* sep = FindSEP(aAddr, aSEID);
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   167
	
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	if (sep)
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		{
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		return sep->GetCapabilityL(aCat);
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		}
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   172
		
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	User::Leave(KErrNotFound);
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	return KNullDesC8();// never reached
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	}
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TAvdtpServiceCategories CRemoteSEPCache::GetCapabilitiesL(const TBTDevAddr& aAddr, TSEID aSEID) const
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	{
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	LOG_FUNC
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	CRemoteSEP* sep = FindSEP(aAddr, aSEID);
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   182
	
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	if (sep)
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		{
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		return sep->GetCapabilities();
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		}
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   187
		
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	User::Leave(KErrNotFound);
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	return TAvdtpServiceCategories();
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	}
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   191
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   192
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TBool CRemoteSEPCache::HasCapability(const TBTDevAddr& aAddr, TSEID aSEID, TAvdtpServiceCategory aCat)
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	{
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	LOG_FUNC
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	CRemoteSEP* sep = FindSEP(aAddr, aSEID);
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   197
	
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	if (sep)
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		{
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		return sep->HasCapability(aCat);
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		}
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parents:
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   202
		
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	return EFalse; // unknown => false
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	}
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   205
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   206
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void CRemoteSEPCache::SetCapabilities(const TBTDevAddr& aAddr, TSEID aSEID, HBufC8* aCapabilitiesAsProtocol)
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   209
/**
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Sets capabilites from the RMBufChain passed in on the relevant CRemoteSEP in our
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cache.
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@return a bitmask of the service categories we saw.
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*/
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   215
	{
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	LOG_FUNC
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	CRemoteSEP* sep = FindSEP(aAddr, aSEID);
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parents:
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   218
	
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   219
	if (sep)
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   220
		{
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		sep->SetCapabilities(aCapabilitiesAsProtocol);
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		}
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   223
	else
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   224
		{
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   225
		// would be nice to cache this, but if we don't know the SEP at this point
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		// the user hadn't done a Discover - which is ok for them, but for us we don't know if the
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		// SEP is in use or Audio/Video etc....We keep the capabilities as the stack finds
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		// them useful later
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		TAvdtpSEPInfo info;
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		info.SetSEID(aSEID);
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		if (AddSEP(aAddr, info)==KErrNone)
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			{
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			SetCapabilities(aAddr, aSEID, aCapabilitiesAsProtocol);
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			}
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		}
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	}
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CRemoteSEPCache::~CRemoteSEPCache()
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	{
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	LOG_FUNC
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	iRemoteSEPs.ResetAndDestroy();
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	}
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TBool CRemoteSEPCache::Exists(const TBTDevAddr& aAddr, TSEID aSEID) const
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	{
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	LOG_FUNC
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	return (FindSEP(aAddr, aSEID)!=NULL);
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	}
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CRemoteSEP* CRemoteSEPCache::FindSEP(const TBTDevAddr& aAddr, TSEID aSEID) const
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	{
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	LOG_FUNC
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	__ASSERT_DEBUG(!aSEID.IsLocal(), Panic(EAvdtpSEIDHasWrongDomain));
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	for (TInt i=0; i<iRemoteSEPs.Count(); i++)
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		{
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		CRemoteSEP& sep = *iRemoteSEPs[i];
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		if (sep.iInfo.SEID() == aSEID && sep.iRemoteDev == aAddr)
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			{
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			return iRemoteSEPs[i]; // does not transfer ownership
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			}
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		}
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	return NULL;
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	}
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void CRemoteSEPCache::InvalidateSEPs(const TBTDevAddr& aAddr)
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	{
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	LOG_FUNC
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	// typically called when signalling channel has gone down
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	// in future we could age the seps and save doing a GetCaps, but this does
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	// risk the use of invalid capabilities (but would still be compliant with GAVDP)	
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	CRemoteSEP* sep = NULL;
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	for (TInt i=0; i<iRemoteSEPs.Count(); i++)
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		{
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		sep = iRemoteSEPs[i];
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		if (sep->iRemoteDev == aAddr)
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			{
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			iRemoteSEPs.Remove(i);
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			delete sep;
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			sep = NULL;
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			}
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		}
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	}
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