telephonyprotocols/rawipnif/inc/RawIPFlow.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:41:59 +0200
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// Copyright (c) 2006-2009 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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// Defines the CRawIPFlow class, which provides a central point for the Flow
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// to communicate with NifMan and the BCA controller. This class creates an
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// interface to the IPv4 binder when it is required.
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// 
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//
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/**
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 @file
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*/
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#ifndef RAWIPFLOW_H
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#define RAWIPFLOW_H
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#include <comms-infras/nifif.h>
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#include <networking/packetlogger.h>
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#include <in_sock.h>
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#include <comms-infras/ss_flowbinders.h>
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#include <comms-infras/ss_subconnflow.h>
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#include "BinderBase.h"
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#include "BcaIoController.h"
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#include "MControllerObserver.h"
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#include "bttlog.h"
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#include <comms-infras/linkmessages.h>		// for TLinkMessageId
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class CBttLogger;
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class CPacketLogger;
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class TRawIpAgentProvision;
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class CBCAProvision;
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class CRawIPFlow : public ESock::CSubConnectionFlowBase, public ESock::MFlowBinderControl,
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				   public MControllerObserver
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	{
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	friend class CRawIPFlowFactory;
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public:
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    //-=========================================================
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    // Methods for handling incoming SCPR messages
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    //-=========================================================
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    void StartFlowL();
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	void StopFlow(TInt aError);
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	void SubConnectionGoingDown();
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	void SubConnectionError(TInt aError);
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	void Destroy();
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	void Notification(TInt aNotificationId);
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	//-=========================================================
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	// CSubConnectionProviderBase methods
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	//-=========================================================
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	MFlowBinderControl* DoGetBinderControlL();
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	//-=========================================================
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	// Messages::ANode methods
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	//-=========================================================
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	virtual void ReceivedL(const Messages::TRuntimeCtxId& aSender, const Messages::TNodeId& aRecipient, Messages::TSignatureBase& aMessage);
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	//-=========================================================
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	// MFlowBinderControl methods
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	//-=========================================================
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	virtual ESock::MLowerControl* GetControlL(const TDesC8& aProtocol);
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	virtual ESock::MLowerDataSender* BindL(const TDesC8& aProtocol, ESock::MUpperDataReceiver* aReceiver, ESock::MUpperControl* aControl);
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	virtual void Unbind(ESock::MUpperDataReceiver* aReceiver, ESock::MUpperControl* aControl);
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	virtual CSubConnectionFlowBase* Flow(); //returns its own flow
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    //-=========================================================
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    // Custom methods
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    //-=========================================================
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    // provide compatability for classes using old CNifIfLink style API and PPP Internal Stop() calls
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    void Stop(TInt aReason, MNifIfNotify::TAction aAction);
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    // call from Binder - MLowerDataSender
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	ESock::MLowerDataSender::TSendResult Send(RMBufChain& aPdu, TUint aProtocol);
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	// Used to be :Pure virtuals inherited from MContextSmObserver
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	CBcaIoController* GetBcaController();
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	void UpdateContextState(RPacketContext::TContextStatus aState,	TInt aError);
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public: // Pure virtuals inherited from MRawIPNifObserverBase
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	virtual void InitialiseL(TInitialisationState aState, TInt aError);
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	virtual void ShutDown(TInitialisationState aState, TInt aError);
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	virtual CBinderBase* GetBinder();
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public: // Pure virtuals inherited from MControllerObserver
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	// Data going upstack
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	virtual void Process(RMBufChain& aPdu, TUint16 aProtocolCode);
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	// Flow Control unblocked
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	virtual void ResumeSending();
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public:
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	// Notify that link is Up/Down
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	void LinkLayerUp();
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	void LinkLayerDown(TInt aError);
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public:	// Send data to CBcaIoController
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	TInt SendPacket(RMBufChain& aPdu, TAny* /*aSource=0*/,
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		TUint16 /*aType=KIp4FrameType*/);
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public:	// Context status retrieval.
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	inline RPacketContext::TContextStatus GetContextStatus();
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protected:
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	CRawIPFlow(ESock::CSubConnectionFlowFactoryBase& aFactory, const Messages::TNodeId& aSubConnId, ESock::CProtocolIntfBase* aProtocolIntf, CBttLogger* aTheLogger);
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	void ConstructL();
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	virtual ~CRawIPFlow();
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    class TBinderControlProxy : public ESock::MFlowBinderControl
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        {
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        public:
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    	virtual ESock::MLowerControl* GetControlL(const TDesC8& aProtocol);
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    	virtual ESock::MLowerDataSender* BindL(const TDesC8& aProtocol, ESock::MUpperDataReceiver* aReceiver, ESock::MUpperControl* aControl);
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    	virtual void Unbind(ESock::MUpperDataReceiver* aReceiver, ESock::MUpperControl* aControl);
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    	virtual CSubConnectionFlowBase* Flow(); //returns its own flow
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    	CRawIPFlow& RawIPFlow()
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        	{
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        	ASSERT(iFlow);
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        	return *iFlow;
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        	}
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        TBinderControlProxy(CRawIPFlow& aFlow)
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        :iFlow(&aFlow)
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            {
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            }
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        CRawIPFlow* iFlow;
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        };
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    TBinderControlProxy* iBinderControl;
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private:
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	void ProvisionConfig(const ESock::RMetaExtensionContainerC& aConfigData);
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	void DynamicProvisionConfigL();
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	// Utility functions
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	void PostProgressMessage(TInt aStage, TInt aError);
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    void SendDataClientIdleIfNoClients();
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private:// Unowned
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	/** networking packet logger for debugging packets */
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	__PACKETLOG_DECLARATION_MEMBER;
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	CBttLogger* iTheLogger;
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	// Upstack bound protocol reference
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	CProtocolBase* iProtocol;
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	// The protocol to use (IPv4).Note: This is not owned by this class.
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	CBinderBase* iBinder;
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	const CBCAProvision* iProvision;						// pointer to BCA provisioning structure in AccessPointConfig
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	const CRawIpAgentConfig* iAgentProvision;				// pointer to Agent provisioning structure in AccessPointConfig
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	TInt iProvisionError;						// error code saved during processing of ProvisionConfig message
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private:// Owned
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	TInt iInitError;
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	RPacketContext::TContextStatus iContextStatus;
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	CBcaIoController* iBcaController;
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	TBool iStarting:1;
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	TBool iStarted:1;
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	TBool iStopping:1;
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	TBool iBlocked:1;
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	};
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inline RPacketContext::TContextStatus CRawIPFlow::GetContextStatus()
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/**
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 * Returns Context status
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 *
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 * @return iContextStatus The context status
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 */
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	{
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	return iContextStatus;
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	}
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#endif // RAWIPFlow_H