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////////////////////////////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2014 Microsoft Corporation. All Rights Reserved.
//
// Module Name:
// CompletionFunctions_PendAuthorizationCallouts.cpp
//
// Abstract:
// This module contains WFP Completion functions for pended authorizations that inject data
// back into the data path.
//
// Naming Convention:
//
// <Module><Scenario>
//
// i.e.
// CompleteBasicPacketInjection
//
// <Module>
// Complete - Function is an FWPS_INJECT_COMPLETE function.
// <Scenario>
// PendAuthorization - Function demonstrates the clone / block / inject
// model for pended items.
//
// <Object><Action>
//
// i.e.
// PendAuthorizationCompletionDataDestroy
//
// <Object>
// {
// PendAuthorizationCompletionData - pertains to PEND_AUTHORIZATION_COMPLETION_DATA.
// }
// <Action>
// Destroy - Cleans up and frees all memory in the object.
//
// Private Functions:
// PendAuthorizationCompletionDataDestroy(),
//
// Public Functions:
// CompletePendAuthorization(),
//
// 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 and
// enhance traces.
//
////////////////////////////////////////////////////////////////////////////////////////////////////
#include "Framework_WFPSamplerCalloutDriver.h" /// .
#include "CompletionFunctions_PendAuthorizationCallouts.tmh" /// $(OBJ_PATH)\$(O)\
/**
@private_function="PendAuthorizationCompletionDataDestroy"
Purpose: <br>
<br>
Notes: <br>
<br>
MSDN_Ref: <br>
*/
_At_(*ppCompletionData, _Pre_ _Notnull_)
_At_(*ppCompletionData, _Post_ _Null_ __drv_freesMem(Pool))
_IRQL_requires_min_(PASSIVE_LEVEL)
_IRQL_requires_max_(DISPATCH_LEVEL)
_IRQL_requires_same_
_Success_(*ppCompletionData == 0)
VOID PendAuthorizationCompletionDataDestroy(_Inout_ PEND_AUTHORIZATION_COMPLETION_DATA** ppCompletionData,
_In_ BOOLEAN override) /* FALSE */
{
#if DBG
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" ---> PendAuthorizationCompletionDataDestroy()\n");
#endif /// DBG
NT_ASSERT(ppCompletionData);
NT_ASSERT(*ppCompletionData);
PEND_AUTHORIZATION_COMPLETION_DATA* pCompletionData = *ppCompletionData;
KIRQL originalIRQL = PASSIVE_LEVEL;
KeAcquireSpinLock(&(pCompletionData->spinLock),
&originalIRQL);
pCompletionData->refCount--;
if(pCompletionData->pClassifyData)
{
if(!(pCompletionData->performedInline))
KrnlHlprClassifyDataDestroyLocalCopy(&(pCompletionData->pClassifyData));
else
{
HLPR_DELETE(pCompletionData->pClassifyData,
WFPSAMPLER_CALLOUT_DRIVER_TAG);
}
}
if(pCompletionData->pInjectionData)
KrnlHlprInjectionDataDestroy(&(pCompletionData->pInjectionData));
if(pCompletionData->pSendParams)
{
HLPR_DELETE_ARRAY(pCompletionData->pSendParams->remoteAddress,
WFPSAMPLER_CALLOUT_DRIVER_TAG);
HLPR_DELETE(pCompletionData->pSendParams,
WFPSAMPLER_CALLOUT_DRIVER_TAG);
}
KeReleaseSpinLock(&(pCompletionData->spinLock),
originalIRQL);
if(pCompletionData->refCount == 0 ||
override)
{
HLPR_DELETE(*ppCompletionData,
WFPSAMPLER_CALLOUT_DRIVER_TAG);
}
#if DBG
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" <--- PendAuthorizationCompletionDataDestroy()\n");
#endif /// DBG
return;
}
/**
@completion_function="CompletePendAuthorization"
Purpose: <br>
<br>
Notes: <br>
<br>
MSDN_Ref: HTTP://MSDN.Microsoft.com/En-Us/Library/Windows/Hardware/FF545018.aspx <br>
*/
_IRQL_requires_min_(PASSIVE_LEVEL)
_IRQL_requires_max_(DISPATCH_LEVEL)
_IRQL_requires_same_
VOID NTAPI CompletePendAuthorization(_In_ VOID* pContext,
_Inout_ NET_BUFFER_LIST* pNetBufferList,
_In_ BOOLEAN dispatchLevel)
{
NT_ASSERT(pContext);
NT_ASSERT(((PEND_AUTHORIZATION_COMPLETION_DATA*)pContext)->pClassifyData);
NT_ASSERT(((PEND_AUTHORIZATION_COMPLETION_DATA*)pContext)->pClassifyData->pClassifyValues);
NT_ASSERT(((PEND_AUTHORIZATION_COMPLETION_DATA*)pContext)->pClassifyData->pClassifyOut);
NT_ASSERT(((PEND_AUTHORIZATION_COMPLETION_DATA*)pContext)->pClassifyData->pFilter);
NT_ASSERT(pNetBufferList);
NT_ASSERT(NT_SUCCESS(pNetBufferList->Status));
UNREFERENCED_PARAMETER(dispatchLevel);
NTSTATUS status = pNetBufferList->Status;
PEND_AUTHORIZATION_COMPLETION_DATA* pCompletionData = (PEND_AUTHORIZATION_COMPLETION_DATA*)pContext;
UINT32 layerID = pCompletionData->pClassifyData->pClassifyValues->layerId;
UINT64 filterID = pCompletionData->pClassifyData->pFilter->filterId;
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" ---> CompletePendAuthorization() [Layer: %s][FilterID: %#I64x][NBL->Status: %#x]",
KrnlHlprFwpsLayerIDToString(layerID),
filterID,
status);
if(status != STATUS_SUCCESS)
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_ERROR_LEVEL,
" !!!! CompletePendAuthorization() [status: %#x]\n",
status);
FwpsFreeCloneNetBufferList(pNetBufferList,
0);
PendAuthorizationCompletionDataDestroy(&pCompletionData);
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" <--- CompletePendAuthorization() [Layer: %s][FilterID: %#I64x][NBL->Status: %#x]",
KrnlHlprFwpsLayerIDToString(layerID),
filterID,
status);
return;
}
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