datacommsserver/esockserver/ssock/ss_flowrequest.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 09:22:25 +0200
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Revision: 200951 Kit: 200951
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// Copyright (c) 1997-2009 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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//
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#include <comms-infras/ss_log.h>
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#include <ss_std.h>
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#include <ss_glob.h>
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#include "SS_conn.H"
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#include "ss_subconn.h"
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#include <comms-infras/ss_subconnflow.h>
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#include <comms-infras/ss_roles.h>
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#include <comms-infras/ss_tiermanagerutils.h>
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#include "ss_flowrequest.h"
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#include <comms-infras/ss_esockstates.h>
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#include "ss_flowrequeststates.h"
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#include <comms-infras/ss_tiermanager.h>
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#include <comms-infras/ss_corepractivities.h>
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#include <cs_subconparams.h>
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#include <comms-infras/ss_nodemessages_serviceprovider.h>
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#include <elements/nm_messages_child.h>
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#include "ss_internal_activities.h"
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#ifdef _DEBUG
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// Panic category for "absolutely impossible!" vanilla ASSERT()-type panics from this module
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// (if it could happen through user error then you should give it an explicit, documented, category + code)
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_LIT(KSpecAssert_ESockSSockFlwRq, "ESockSSockFlwRq");
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#endif
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using namespace ESock;
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using namespace NetStateMachine;
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using namespace FlowRequestStates;
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using namespace FlowRequestActivities;
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using namespace Messages;
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using namespace MeshMachine;
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namespace FlowRequestDestroyActivity
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{
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DECLARE_DEFINE_CUSTOM_NODEACTIVITY(ECFActivityDestroy, FlowRequestDestroy, TEChild::TDestroy, FlowRequestActivities::CFlowRequestDestroyActivity::New)
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	FIRST_NODEACTIVITY_ENTRY(MeshMachine::TAwaitingDestroy, MeshMachine::TNoTag)
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	THROUGH_NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TRemoveRequestor, MeshMachine::TNoTag)
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	//TCFSubConnFlowRequest adds subconnection as a control provider so remove if necessary
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	THROUGH_NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TSendClientLeavingAndRemoveControlProvider, MeshMachine::TNoTag)
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	THROUGH_NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TLeaveServiceProvidersOrSetIdle, MeshMachine::TNoTag)
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	//TDestroyAwaitingLeaveCompleteLoop loops back to its own triple if more SPs
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	NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TSetIdleIfNoServiceProviders, MeshMachine::TAwaitingLeaveComplete, CoreActivities::CDestroyActivity::TNoTagOrNoTagBackwards)
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	LAST_NODEACTIVITY_ENTRY(KNoTag, CoreStates::TAbortAllActivities)
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NODEACTIVITY_END()
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}
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namespace ImplicitFlowActivity
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{
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DECLARE_DEFINE_CUSTOM_NODEACTIVITY(ECFActivityImplicitFlow, ImplicitFlow, TCFInternalEsock::TFlowRequest, FlowRequestActivities::CFlowRequestActivity::NewL)
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	FIRST_NODEACTIVITY_ENTRY(FlowRequestStates::TAwaitingImplicitFlowRequest, MeshMachine::TNoTag)
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	THROUGH_NODEACTIVITY_ENTRY(KNoTag, CFlowRequestActivity::TStoreFlowParams, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TRequestCSRCreation, CoreNetStates::TAwaitingCSRCreated, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TSelectMetaPlane, CoreNetStates::TAwaitingBindTo, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TSendControlClientJoinRequest, CoreStates::TAwaitingJoinComplete, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, CoreActivities::ABindingActivity::TSendBindToCompleteAndRequestCommsBinder, CoreNetStates::TAwaitingBinderResponse,MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TJoinReceivedSCpr, CoreStates::TAwaitingJoinComplete, MeshMachine::TNoTag)
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	THROUGH_NODEACTIVITY_ENTRY(KNoTag, CoreActivities::ABindingActivity::TSendBindToComplete, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TRequestCommsBinderFromSCpr, CoreNetStates::TAwaitingBinderResponse, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TSendBindTo, CoreNetStates::TAwaitingBindToComplete, MeshMachine::TNoTag)
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	THROUGH_NODEACTIVITY_ENTRY(KNoTag, CoreActivities::ABindingActivity::TSendBindToComplete, MeshMachine::TNoTag)
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	//Cleanup
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	THROUGH_NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TRemoveRequestor, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TLeaveServiceProvidersOrSetIdle, MeshMachine::TAwaitingLeaveComplete, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TSetIdleIfNoServiceProviders, MeshMachine::TAwaitingLeaveComplete, CoreActivities::CDestroyActivity::TNoTagOrNoTagBackwards)
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	LAST_NODEACTIVITY_ENTRY(KNoTag, MeshMachine::TDoNothing)
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NODEACTIVITY_END()
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}
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namespace ConnectionFlowActivity
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{
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DECLARE_DEFINE_CUSTOM_NODEACTIVITY(ECFActivityConnectionFlow, ConnectionFlow, TCFInternalEsock::TFlowRequest, FlowRequestActivities::CFlowRequestActivity::NewL)
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	FIRST_NODEACTIVITY_ENTRY(FlowRequestStates::TAwaitingConnFlowRequest, MeshMachine::TNoTag)
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	THROUGH_NODEACTIVITY_ENTRY(KNoTag, CFlowRequestActivity::TStoreFlowParams, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TJoinCpr, CoreStates::TAwaitingJoinComplete, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TRequestCommsBinder, CoreNetStates::TAwaitingBinderResponse, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TJoinReceivedSCpr, CoreStates::TAwaitingJoinComplete, MeshMachine::TNoTag)
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	THROUGH_NODEACTIVITY_ENTRY(KNoTag, CoreActivities::ABindingActivity::TSendBindToComplete, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TRequestCommsBinderFromSCpr, CoreNetStates::TAwaitingBinderResponse, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TSendBindTo, CoreNetStates::TAwaitingBindToComplete,MeshMachine::TNoTag)
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	THROUGH_NODEACTIVITY_ENTRY(KNoTag, CoreActivities::ABindingActivity::TSendBindToComplete, MeshMachine::TNoTag)
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	//Cleanup
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	THROUGH_NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TRemoveRequestor, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TLeaveServiceProvidersOrSetIdle, MeshMachine::TAwaitingLeaveComplete, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TSetIdleIfNoServiceProviders, MeshMachine::TAwaitingLeaveComplete, CoreActivities::CDestroyActivity::TNoTagOrNoTagBackwards)
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	LAST_NODEACTIVITY_ENTRY(KNoTag, MeshMachine::TDoNothing)
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NODEACTIVITY_END()
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}
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   105
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namespace SubConnectionFlowActivity
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{
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DECLARE_DEFINE_CUSTOM_NODEACTIVITY(ECFActivitySubConnectionFlow, SubConnectionFlow, TCFInternalEsock::TFlowRequest, FlowRequestActivities::CFlowRequestActivity::NewL)
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	FIRST_NODEACTIVITY_ENTRY(FlowRequestStates::TAwaitingSubConnFlowRequest, MeshMachine::TNoTag)
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   110
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	// Send TNoBearer to CSubConnection and wait for TBindTo?
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	THROUGH_NODEACTIVITY_ENTRY(KNoTag, CFlowRequestActivity::TStoreFlowParams, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TJoinSubConnection, CoreStates::TAwaitingJoinComplete, MeshMachine::TNoTag)
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	NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TSendNoBearer, MeshMachine::TAcceptErrorState<CoreNetStates::TAwaitingBindTo>, MeshMachine::TNoTagOrErrorTag)
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   115
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        // NoBearer Succeeded
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        // Forward TBindTo to the socket itself. After all it is the one to do the binding
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        NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TForwardBindToMsgToOriginator, CoreNetStates::TAwaitingBindToComplete, MeshMachine::TNoTag)
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        THROUGH_NODEACTIVITY_ENTRY(KNoTag, MeshMachine::TClearError, MeshMachine::TNoTag) // The socket will error the client. Allow the BindToComplete to finish naturally.
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        THROUGH_NODEACTIVITY_ENTRY(KNoTag, CoreActivities::ABindingActivity::TSendBindToComplete, MeshMachine::TNoTag)
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   121
    
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        // Cleanup
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        THROUGH_NODEACTIVITY_ENTRY(KNoTag, FlowRequestStates::TRemoveRequestor, MeshMachine::TNoTag)
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        NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TLeaveServiceProvidersOrSetIdle, MeshMachine::TAwaitingLeaveComplete, MeshMachine::TNoTag)
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        NODEACTIVITY_ENTRY(KNoTag, CoreNetStates::TSetIdleIfNoServiceProviders, MeshMachine::TAwaitingLeaveComplete, CoreActivities::CDestroyActivity::TNoTagOrNoTagBackwards)
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        LAST_NODEACTIVITY_ENTRY(KNoTag, MeshMachine::TDoNothing)
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   127
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	// There was an error from the NoBearer request so lets clean up
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	NODEACTIVITY_ENTRY(KErrorTag, FlowRequestStates::TLeaveSubConnection, MeshMachine::TAwaitingLeaveComplete, MeshMachine::TNoTag)
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	LAST_NODEACTIVITY_ENTRY(KNoTag, MeshMachine::TRaiseAndClearActivityError)
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NODEACTIVITY_END()
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}
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   133
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namespace FlowRequestActivities
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{
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DECLARE_DEFINE_ACTIVITY_MAP(flowRequestActivities)
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    ACTIVITY_MAP_ENTRY(CoreErrorActivity, CoreError)
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	ACTIVITY_MAP_ENTRY(ImplicitFlowActivity, ImplicitFlow)
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	ACTIVITY_MAP_ENTRY(ConnectionFlowActivity, ConnectionFlow)
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	ACTIVITY_MAP_ENTRY(SubConnectionFlowActivity, SubConnectionFlow)
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	ACTIVITY_MAP_ENTRY(FlowRequestDestroyActivity, FlowRequestDestroy)
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ACTIVITY_MAP_END()
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}
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CFlowRequest::CFlowRequest(TSubSessionUniqueId aSubSessionUniqueId)
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:   ACFMMNodeIdBase(FlowRequestActivities::flowRequestActivities::Self()),
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	ASubSessionPlatsecApiExt(aSubSessionUniqueId),
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	TIfStaticFetcherNearestInHierarchy(this)
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	{
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	LOG_NODE_CREATE(KESockFlowTag, CFlowRequest);
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	}
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   152
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CFlowRequest::~CFlowRequest()
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	{
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	// We own the flow parameters sent to us and need to close them but
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	// it is possible for the pointer to be null if the CFlowRequest
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	// is created then destroyed before it is started.  This will happen
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	// if e.g., it is popped and destroyed from the cleanup stack due to
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	// the allocation of a second object by the flow requests's creator
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	// causing a leave due to OOM before the flow request could be
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	// started.
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	iFlowParameters.Close();
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	LOG_NODE_DESTROY(KESockFlowTag, CFlowRequest);
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	__ASSERT_DEBUG(iClients.Count()==0, User::Panic(KSpecAssert_ESockSSockFlwRq, 1)); //Please fix your node.
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	}
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   166
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void CFlowRequest::Received(TNodeContextBase& aContext)
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    {
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    TNodeSignal::TMessageId noPeerIds[] = {
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    	TCFInternalEsock::TFlowRequest::Id(),
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    	TNodeSignal::TMessageId()
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    	};
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    MeshMachine::AMMNodeBase::Received(noPeerIds, aContext);
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	MeshMachine::AMMNodeBase::PostReceived(aContext);
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	}
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   176
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CFlowRequest* CFlowRequest::NewL(TSubSessionUniqueId aSubSessionUniqueId)
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	{
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	CFlowRequest* request = new(ELeave) CFlowRequest(aSubSessionUniqueId);
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   180
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	CleanupStack::PushL(request);
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	request->ConstructL();
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	CleanupStack::Pop();
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   184
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	return request;
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	}
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   187
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void CFlowRequest::ReceivedL(const TRuntimeCtxId& aSender, const TNodeId& aRecipient, TSignatureBase& aMessage)
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    {
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    // TODO: TCFMessage::TConnectionGoingDown - If this message is received
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    // a new flow request needs to be sent on behalf of the socket, and
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    // this one needs to cleanup/destroy itself. This is for the race condition
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    // where either the idle timer triggers and begin stopping the connection,
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    // or the connection is lost (both resulting in TConnectionGoingDown) while
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    // the flow request is in progress.
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    if (aMessage.IsMessage<TCFMessage::TStateChange>() ||
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        aMessage.IsMessage<TCFControlClient::TGoneDown>() )
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   198
        {
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        // Note of caution: As a control client of providers the CFlowRequest
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        // could be bombarded with messages that we have no interest in.
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        // TStateChange is one, but there could be others. Due to the nature
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        // of the mesh machine if we don't handle them it will forward them
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        // to the CSocket which only expects a limited set of messages from
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        // the CFlowRequest. The CSocket wont like the messages and its not
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        // great for performance to forward them unnecessarily so try to kill
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        // them off here.
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        aMessage.ClearMessageId();
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        return;
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        }
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	TNodeContext<CFlowRequest> ctx(*this, aMessage, aSender, aRecipient);
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    CFlowRequest::Received(ctx);
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    User::LeaveIfError(ctx.iReturn);
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	}
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void CFlowRequest::ReturnInterfacePtrL(MPlatsecApiExt*& aInterface)
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	{
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	aInterface = this;
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	}
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CImplicitFlowRequest::CImplicitFlowRequest(TSubSessionUniqueId aSubSessionUniqueId, const TNodeId& aTierManagerFC, TUid aTierId)
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:	CFlowRequest(aSubSessionUniqueId),
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	iTierManagerFC(aTierManagerFC),
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	iTierId(aTierId)
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	{
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	__ASSERT_DEBUG(!iTierManagerFC.IsNull() && iTierId.iUid!=0, User::Panic(KSpecAssert_ESockSSockFlwRq, 2));
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	LOG_NODE_CREATE(KESockFlowTag, CImplicitFlowRequest);
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	}
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CImplicitFlowRequest::~CImplicitFlowRequest()
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	{
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	LOG_NODE_DESTROY(KESockFlowTag, CImplicitFlowRequest);
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	if (!iCSR.IsNull())
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		{
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		RNodeInterface::OpenPostMessageClose(Id(), iCSR, TEChild::TDestroy().CRef());
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		iCSR.SetNull();
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		}
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	}
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CImplicitFlowRequest* CImplicitFlowRequest::NewL(TSubSessionUniqueId aSubSessionUniqueId, const TNodeId& aTierManagerFC, TUid aTierId)
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	{
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	CImplicitFlowRequest* request = new(ELeave) CImplicitFlowRequest(aSubSessionUniqueId, aTierManagerFC, aTierId);
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	CleanupStack::PushL(request);
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	request->ConstructL();
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	CleanupStack::Pop();
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	return request;
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	}
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//
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//TCFFlowRequestBase
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TCFFlowRequestBase::TCFFlowRequestBase(TSubSessionUniqueId aSubSessionUniqueId)
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:	iSubSessionUniqueId(aSubSessionUniqueId), iFlowParams()
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	{
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	}
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//
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//TCFImplicitFlowRequest
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void TCFImplicitFlowRequest::StartL(const TNodeId& aSender, const Messages::ANode& aItf)
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	{
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	TUid tierId = TierManagerUtils::MapTierIdsForLegacyImplicitFlowsL(
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		TUid::Uid(iFlowParams.iAddrFamily),
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		iFlowParams.iProtocol
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		);
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	CImplicitFlowRequest* req = CImplicitFlowRequest::NewL(iSubSessionUniqueId, aItf.NodeId(),tierId);
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	CleanupStack::PushL(req);
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	req->AddClientL(aSender, TClientType(TCFClientType::ECtrl));
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	TCFInternalEsock::TFlowRequest msg(iFlowParams);
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	req->ReceivedL(aSender, req->Id(), msg); //trigger the activity
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	CleanupStack::Pop(req);
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	}
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void TCFImplicitFlowRequest::DispatchL(const TRuntimeCtxId& aSender, const TRuntimeCtxId& aRecipient)
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	{
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	const TNodeId& nodeId = address_cast<const TNodeId>(aRecipient);  //This message type operates on nodes
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	__ASSERT_DEBUG(nodeId==SockManGlobals::Get()->GetPlaneFC(TCFPlayerRole(TCFPlayerRole::ETierMgrPlane)), User::Panic(KSpecAssert_ESockSSockFlwRq, 3)); //Implicit socket -> Must be dispatched on the TMF container!
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	StartL(address_cast<TNodeId>(aSender), nodeId.Node());
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	}
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//
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//TCFConnFlowRequest
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void TCFConnFlowRequest::StartL(const TNodeId& aSender)
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	{
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	__ASSERT_DEBUG(iSession, User::Panic(KSpecAssert_ESockSSockFlwRq, 4));
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    CConnection* cn = iSession->CConnectionFromHandle(iHandle);
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    User::LeaveIfError(cn? KErrNone : KErrBadHandle);
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	RNodeInterface* cnsp = cn->ServiceProvider();
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	User::LeaveIfError(cnsp? KErrNone : KErrNotReady);
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	CFlowRequest* req = CFlowRequest::NewL(iSubSessionUniqueId);
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	CleanupStack::PushL(req);
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	req->AddClientL(aSender, TClientType(TCFClientType::ECtrl));
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	req->AddClientL(cnsp->RecipientId(), TClientType(TCFClientType::EServProvider, TCFClientType::EActive));
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	TCFInternalEsock::TFlowRequest msg(iFlowParams); //Message to triger flow activity
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	req->ReceivedL(aSender, req->Id(), msg);
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	CleanupStack::Pop(req);
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	}
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void TCFConnFlowRequest::DispatchL(const TRuntimeCtxId& aSender, const TRuntimeCtxId& aRecipient)
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	{
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	const TNodeId& nodeId = address_cast<const TNodeId>(aRecipient);  //This message type operates on nodes
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	__ASSERT_DEBUG(nodeId==SockManGlobals::Get()->GetPlaneFC(TCFPlayerRole(TCFPlayerRole::EConnPlane)), User::Panic(KSpecAssert_ESockSSockFlwRq, 5)); //Should be dispatched on the Connection Plane container!
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	StartL(address_cast<TNodeId>(aSender));
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	}
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//
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//TCFSubConnFlowRequest
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void TCFSubConnFlowRequest::StartL(const TNodeId& aSender)
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	{
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	__ASSERT_DEBUG(iSession, User::Panic(KSpecAssert_ESockSSockFlwRq, 6));
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    CSubConnection* scn = iSession->CSubConnectionFromHandle(iHandle);
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    User::LeaveIfError(scn ? KErrNone : KErrBadHandle);
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	CFlowRequest* req = CFlowRequest::NewL(iSubSessionUniqueId);
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	CleanupStack::PushL(req);
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	req->AddClientL(aSender, TClientType(TCFClientType::ECtrl));
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	// Formerly, the top level SCPR would have been set as the service provider to the flow request
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	// Instead we will apply the subconnection itself as the control provider so that we can instead drive it with TNoBearer
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	req->AddClientL(scn->Id(), TClientType(TCFClientType::ECtrlProvider, TCFClientType::EDefault));
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	TCFInternalEsock::TFlowRequest msg(iFlowParams); //Message to triger flow activity
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	req->ReceivedL(aSender, req->Id(), msg);
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	CleanupStack::Pop(req);
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	}
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void TCFSubConnFlowRequest::DispatchL( const TRuntimeCtxId& aSender, const TRuntimeCtxId& aRecipient)
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	{
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	const TNodeId& nodeId = address_cast<const TNodeId>(aRecipient);  //This message type operates on nodes
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	__ASSERT_DEBUG(nodeId==SockManGlobals::Get()->GetPlaneFC(TCFPlayerRole(TCFPlayerRole::ESubConnPlane)), User::Panic(KSpecAssert_ESockSSockFlwRq, 7)); //Should be dispatched on the SubConnection Plane container!
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	StartL(address_cast<TNodeId>(aSender));
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	}
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