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////////////////////////////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2014 Microsoft Corporation. All Rights Reserved.
//
// Module Name:
// SubscriptionFunctions_BFEState.cpp
//
// Abstract:
// This module contains WFP callback functions for changes in the BFE state.
//
// Naming Convention:
//
// <Module><Scenario>
//
// i.e.
//
// SubscriptionBFEStateChangeCallback
//
// <Module>
// Subscription - Function pertains to a subscription.
// <Scenario>
// BFEStateChangeCallback - Function demonstates use of the BFE service state change
// callback.
//
// Author:
// Dusty Harper (DHarper)
//
// Revision History:
//
// [ Month ][Day] [Year] - [Revision]-[ Comments ]
// May 01, 2010 - 1.0 - Creation
// December 13, 2013 - 1.1 - Enhance function declaration for IntelliSense
//
////////////////////////////////////////////////////////////////////////////////////////////////////
#include "Framework_WFPSamplerCalloutDriver.h" /// .
#include "SubscriptionFunctions_BFEState.tmh" /// $(OBJ_PATH)\$(O)\
/**
@notify_function="SubscriptionBFEStateChangeCallback"
Purpose: Callback, invoked on BFE service state change, which will get or release a handle
to the engine. <br>
<br>
Notes: <br>
<br>
MSDN_Ref: HTTP://MSDN.Microsoft.com/En-US/Library/Windows/Hardware/FF550062.aspx <br>
*/
_IRQL_requires_(PASSIVE_LEVEL)
_IRQL_requires_same_
VOID CALLBACK SubscriptionBFEStateChangeCallback(_Inout_ VOID* pContext,
_In_ FWPM_SERVICE_STATE bfeState)
{
#if DBG
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" ---> SubscriptionBFEStateChangeCallback()\n");
#endif /// DBG
NT_ASSERT(pContext);
NTSTATUS status = STATUS_SUCCESS;
WFPSAMPLER_DEVICE_DATA* pDeviceData = (WFPSAMPLER_DEVICE_DATA*)pContext;
switch(bfeState)
{
case FWPM_SERVICE_RUNNING:
{
if(pDeviceData->pEngineHandle == 0)
{
status = KrnlHlprFwpmSessionCreateEngineHandle(&(pDeviceData->pEngineHandle));
HLPR_BAIL_ON_FAILURE(status);
}
break;
}
case FWPM_SERVICE_STOP_PENDING:
{
KrnlHlprFwpmSessionDestroyEngineHandle(&(pDeviceData->pEngineHandle));
break;
}
}
HLPR_BAIL_LABEL:
#if DBG
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" <--- SubscriptionBFEStateChangeCallback() [status: %#x]\n",
status);
#endif /// DBG
return;
}
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