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////////////////////////////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2014 Microsoft Corporation. All Rights Reserved.
//
// Module Name:
// CompletionFunctions_BasicStreamInjectionCallouts.cpp
//
// Abstract:
// This module contains WFP Completion functions for injecting packets back into the stream
// using the clone / block / inject method.
//
// Naming Convention:
//
// <Module><Scenario>
//
// i.e.
// CompleteBasicStreamInjection
//
// <Module>
// Complete - Function is an FWPS_INJECT_COMPLETE function.
// <Scenario>
// BasicStreamInjection - Function demonstrates the clone / block / inject
// model.
//
// <Object><Action>
//
// i.e.
// BasicPacketInjectionsCompletionDataDestroy
//
// <Object>
// {
// BasicStreamInjectionCompletionData - pertains to BASIC_STREAM_INJECTION_COMPLETION_DATA.
// }
// <Action>
// Destroy - Cleans up and frees all memory in the object.
//
// Private Functions:
// BasicStreamInjectionCompletionDataDestroy(),
//
// Public Functions:
// CompleteBasicStreamInjection(),
//
// 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 "CompletionFunctions_BasicStreamInjectionCallouts.tmh" /// $(OBJ_PATH)\$(O)\
_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 BasicStreamInjectionCompletionDataDestroy(_Inout_ BASIC_STREAM_INJECTION_COMPLETION_DATA** ppCompletionData,
_In_ BOOLEAN override) /* FALSE */
{
#if DBG
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" ---> BasicStreamInjectionCompletionDataDestroy()\n");
#endif /// DBG
NT_ASSERT(ppCompletionData);
NT_ASSERT(*ppCompletionData);
BASIC_STREAM_INJECTION_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));
KeReleaseSpinLock(&(pCompletionData->spinLock),
originalIRQL);
/// Stream indicated each individual NBL from a chain, so wait until the last NBL is indicated
/// before removing the completionData.
if(pCompletionData->refCount == 0 ||
override)
{
HLPR_DELETE(*ppCompletionData,
WFPSAMPLER_CALLOUT_DRIVER_TAG);
}
#if DBG
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" <--- BasicStreamInjectionCompletionDataDestroy()\n");
#endif /// DBG
return;
}
_IRQL_requires_min_(PASSIVE_LEVEL)
_IRQL_requires_max_(DISPATCH_LEVEL)
_IRQL_requires_same_
VOID NTAPI CompleteBasicStreamInjection(_In_ VOID* pContext,
_Inout_ NET_BUFFER_LIST* pNetBufferList,
_In_ BOOLEAN dispatchLevel)
{
#if DBG
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" ---> CompleteBasicStreamInjection()\n");
#endif /// DBG
UNREFERENCED_PARAMETER(dispatchLevel);
NT_ASSERT(pContext);
NT_ASSERT(pNetBufferList);
NT_ASSERT(NT_SUCCESS(pNetBufferList->Status) ||
pNetBufferList->Status == STATUS_CONNECTION_ABORTED);
if(pNetBufferList->Status != STATUS_SUCCESS)
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_ERROR_LEVEL,
" !!!! CompleteBasicStreamInjection() [status: %#x]\n",
pNetBufferList->Status);
FwpsFreeCloneNetBufferList(pNetBufferList,
0);
BasicStreamInjectionCompletionDataDestroy((BASIC_STREAM_INJECTION_COMPLETION_DATA**)&pContext);
#if DBG
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" <--- CompleteBasicStreamInjection()\n");
#endif /// DBG
return;
}
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