Sample Code
Windows Driver Samples/ Windows Filtering Platform Sample/ C++/ svc/ Scenarios_BasicStreamInjection.cpp/
////////////////////////////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2012 Microsoft Corporation. All Rights Reserved.
//
// Module Name:
// Scenarios_BasicStreamInjection.cpp
//
// Abstract:
// This module contains functions which implements the BASIC_STREAM_INJECTION scenarios.
//
// Naming Convention:
//
// <Scope><Object><Action><Modifier>
// <Scope><Object><Action>
//
// i.e.
//
// <Scope>
// {
// - Function is likely visible to other modules
// Prv - Function is private to this module.
// }
// <Object>
// {
// ScenarioBasicStreamInjection - Function pertains to all of the Basic Stream Injection
// Scenarios
// RPC - Function is and RPC entry point.
// }
// <Action>
// {
// Add - Function adds objects
// Remove - Function removes objects
// Invoke - Function implements the scenario based on parameters
// passed from the commandline interface
// (WFPSampler.exe).
// }
// <Modifier>
// {
// FwpmObjects - Function acts on WFP objects.
// ScenarioBasicStreamInjection - Function pertains to all of the Basic Stream Injection
// Scenarios
// }
//
// Private Functions:
// PrvScenarioBasicStreamInjectionDeleteFwpmObjects(),
// PrvScenarioBasicStreamInjectionAddFwpmObjects(),
// ScenarioBasicStreamInjectionAdd(),
// ScenarioBasicStreamInjectionRemove(),
//
// Public Functions:
// RPCInvokeScenarioBasicStreamInjection(),
//
// Author:
// Dusty Harper (DHarper)
//
// Revision History:
//
// [ Month ][Day] [Year] - [Revision]-[ Comments ]
// May 01, 2010 - 1.0 - Creation
//
////////////////////////////////////////////////////////////////////////////////////////////////////
#include "Framework_WFPSamplerService.h" /// .
/**
@private_function="PrvScenarioBasicStreamInjectionDeleteFwpmObjects"
Purpose: Function that disables the SCENARIO_BASIC_STREAM_INJECTION scenarios. <br>
<br>
Notes: Scenario removes the filters using specified filtering conditions at the specified
layer. Associated callouts and provider contexts are removed as well. <br>
<br>
MSDN_Ref: <br>
*/
_Success_(return == NO_ERROR)
UINT32 PrvScenarioBasicStreamInjectionDeleteFwpmObjects(_In_ const FWPM_FILTER* pFilter)
{
ASSERT(pFilter);
UINT32 status = NO_ERROR;
HANDLE engineHandle = 0;
HANDLE enumHandle = 0;
UINT32 entryCount = 0;
FWPM_FILTER** ppFilters = 0;
FWPM_FILTER_ENUM_TEMPLATE filterEnumTemplate = {0};
FWPM_PROVIDER_CONTEXT_ENUM_TEMPLATE providerContextEnumTemplate = {0};
GUID calloutKey = {0};
calloutKey = WFPSAMPLER_CALLOUT_BASIC_STREAM_INJECTION;
calloutKey.Data4[7] = HlprFwpmLayerGetIDByKey(&(pFilter->layerKey)); /// Uniquely identifies the callout used
providerContextEnumTemplate.providerContextType = FWPM_GENERAL_CONTEXT;
filterEnumTemplate.providerKey = (GUID*)&WFPSAMPLER_PROVIDER;
filterEnumTemplate.layerKey = pFilter->layerKey;
filterEnumTemplate.enumType = FWP_FILTER_ENUM_FULLY_CONTAINED;
filterEnumTemplate.flags = FWP_FILTER_ENUM_FLAG_INCLUDE_BOOTTIME |
FWP_FILTER_ENUM_FLAG_INCLUDE_DISABLED;
filterEnumTemplate.numFilterConditions = pFilter->numFilterConditions;
filterEnumTemplate.filterCondition = pFilter->filterCondition;
filterEnumTemplate.providerContextTemplate = &providerContextEnumTemplate;
filterEnumTemplate.actionMask = FWP_ACTION_FLAG_CALLOUT;
filterEnumTemplate.calloutKey = &calloutKey;
status = HlprFwpmEngineOpen(&engineHandle);
HLPR_BAIL_ON_FAILURE(status);
status = HlprFwpmFilterCreateEnumHandle(engineHandle,
&filterEnumTemplate,
&enumHandle);
HLPR_BAIL_ON_FAILURE(status);
status = HlprFwpmFilterEnum(engineHandle,
enumHandle,
0xFFFFFFFF,
&ppFilters,
&entryCount);
HLPR_BAIL_ON_FAILURE(status);
if(ppFilters)
{
for(UINT32 filterIndex = 0;
filterIndex < entryCount;
filterIndex++)
{
HlprFwpmFilterDeleteByKey(engineHandle,
&(ppFilters[filterIndex]->filterKey));
HlprFwpmCalloutDeleteByKey(engineHandle,
&(ppFilters[filterIndex]->action.calloutKey));
if(ppFilters[filterIndex]->flags & FWPM_FILTER_FLAG_HAS_PROVIDER_CONTEXT)
HlprFwpmProviderContextDeleteByKey(engineHandle,
&(ppFilters[filterIndex]->providerContextKey));
}
FwpmFreeMemory((void**)&ppFilters);
}
HLPR_BAIL_LABEL:
if(engineHandle)
{
if(enumHandle)
HlprFwpmFilterDestroyEnumHandle(engineHandle,
&enumHandle);
HlprFwpmEngineClose(&engineHandle);
}
return status;
}
/**
@private_function="PrvScenarioBasicPacketInjectionAddFwpmObjects"
Purpose: Function that enables the SCENARIO_BASIC_STREAM_INJECTION scenarios. <br>
<br>
Notes: Scenario adds a filter using specified filtering conditions to the specified layer.
This filter is associated with WFPSampler's default sublayer and provider. The
appropriate callout and provider context is then added and associated with the
filter. <br>
<br>
MSDN_Ref: <br>
*/
_Success_(return == NO_ERROR)
UINT32 PrvScenarioBasicStreamInjectionAddFwpmObjects(_In_ const FWPM_FILTER* pFilter,
_In_ const PC_BASIC_STREAM_INJECTION_DATA* pPCBasicStreamInjectionData)
{
ASSERT(pFilter);
ASSERT(pPCBasicStreamInjectionData);
UINT32 status = NO_ERROR;
HANDLE engineHandle = 0;
FWP_BYTE_BLOB byteBlob = {0};
FWPM_PROVIDER_CONTEXT providerContext = {0};
FWPM_CALLOUT callout = {0};
FWPM_FILTER filter = {0};
RtlCopyMemory(&filter,
pFilter,
sizeof(FWPM_FILTER));
status = HlprGUIDPopulate(&(providerContext.providerContextKey));
HLPR_BAIL_ON_FAILURE(status);
providerContext.displayData.name = L"WFPSampler's Basic Stream Injection Provider Context";
providerContext.providerKey = (GUID*)&WFPSAMPLER_PROVIDER;
providerContext.type = FWPM_GENERAL_CONTEXT;
providerContext.dataBuffer = &byteBlob;
providerContext.dataBuffer->size = sizeof(PC_BASIC_STREAM_INJECTION_DATA);
providerContext.dataBuffer->data = (UINT8*)pPCBasicStreamInjectionData;
callout.calloutKey = WFPSAMPLER_CALLOUT_BASIC_STREAM_INJECTION;
callout.calloutKey.Data4[7] = HlprFwpmLayerGetIDByKey(&(filter.layerKey)); /// Uniquely identifies the callout used
callout.displayData.name = L"WFPSampler's Basic Stream Injection Callout";
callout.displayData.description = L"Causes callout invocation which blindly injects stream data back";
callout.flags = FWPM_CALLOUT_FLAG_USES_PROVIDER_CONTEXT;
callout.providerKey = (GUID*)&WFPSAMPLER_PROVIDER;
callout.applicableLayer = filter.layerKey;
status = HlprGUIDPopulate(&(filter.filterKey));
HLPR_BAIL_ON_FAILURE(status);
filter.flags |= FWPM_FILTER_FLAG_HAS_PROVIDER_CONTEXT;
filter.providerKey = (GUID*)&WFPSAMPLER_PROVIDER;
filter.subLayerKey = WFPSAMPLER_SUBLAYER;
filter.weight.type = FWP_UINT8;
filter.weight.uint8 = 0xF;
filter.action.type = FWP_ACTION_CALLOUT_UNKNOWN;
filter.action.calloutKey = callout.calloutKey;
filter.providerContextKey = providerContext.providerContextKey;
if(filter.flags & FWPM_FILTER_FLAG_BOOTTIME ||
filter.flags & FWPM_FILTER_FLAG_PERSISTENT)
{
providerContext.flags |= FWPM_PROVIDER_CONTEXT_FLAG_PERSISTENT;
callout.flags |= FWPM_CALLOUT_FLAG_PERSISTENT;
}
status = HlprFwpmEngineOpen(&engineHandle);
HLPR_BAIL_ON_FAILURE(status);
status = HlprFwpmTransactionBegin(engineHandle);
HLPR_BAIL_ON_FAILURE(status);
status = HlprFwpmProviderContextAdd(engineHandle,
&providerContext);
HLPR_BAIL_ON_FAILURE(status);
status = HlprFwpmCalloutAdd(engineHandle,
&callout);
HLPR_BAIL_ON_FAILURE(status);
status = HlprFwpmFilterAdd(engineHandle,
&filter);
HLPR_BAIL_ON_FAILURE(status);
status = HlprFwpmTransactionCommit(engineHandle);
HLPR_BAIL_ON_FAILURE(status);
HLPR_BAIL_LABEL:
if(engineHandle)
{
if(status != NO_ERROR)
HlprFwpmTransactionAbort(engineHandle);
HlprFwpmEngineClose(&engineHandle);
}
return status;
}
/**
@scenario_function="ScenarioBasicStreamInjectionRemove"
Purpose: Function that removes corresponding objects for a previously added
SCENARIO_BASIC_STREAM_INJECTION. <br>
<br>
Notes: <br>
<br>
MSDN_Ref: <br>
*/
_Success_(return == NO_ERROR)
UINT32 ScenarioBasicStreamInjectionRemove(_In_ const FWPM_FILTER* pFilter)
{
ASSERT(pFilter);
return PrvScenarioBasicStreamInjectionDeleteFwpmObjects(pFilter);
}
/**
@scenario_function="ScenarioBasicStreamInjectionAdd"
Purpose: Scenario which will blindly reinject the classified stream data. <br>
<br>
Notes: Adds a filter which references one of the
WFPSAMPLER_CALLOUT_BASIC_STREAM_INJECTION callouts for the provided layer. <br>
<br>
No data modification is made to the data <br>
<br>
Ideal usage is to implement in the presence of a 3rd party firewall to see how they
coexist with another provider performing stream injection. <br>
<br>
MSDN_Ref: <br>
*/
_Success_(return == NO_ERROR)
UINT32 ScenarioBasicStreamInjectionAdd(_In_ const FWPM_FILTER* pFilter,
_In_ const PC_BASIC_STREAM_INJECTION_DATA* pPCBasicStreamInjectionData)
{
ASSERT(pFilter);
ASSERT(pPCBasicStreamInjectionData);
return PrvScenarioBasicStreamInjectionAddFwpmObjects(pFilter,
pPCBasicStreamInjectionData);
}
/**
@rpc_function="RPCInvokeScenarioBasicStreamInjection"
Purpose: RPC exposed function used to dipatch the scenario routines for
SCENARIO_BASIC_STREAM_INJECTION. <br>
<br>
Notes: <br>
<br>
MSDN_Ref: <br>
*/
/* [fault_status][comm_status] */
error_status_t RPCInvokeScenarioBasicStreamInjection(/* [in] */ handle_t rpcBindingHandle,
/* [in] */ WFPSAMPLER_SCENARIO scenario,
/* [in] */ FWPM_CHANGE_TYPE changeType,
/* [ref][in] */ __RPC__in const FWPM_FILTER0* pFilter,
/* [unique][in] */ __RPC__in_opt const PC_BASIC_STREAM_INJECTION_DATA* pPCBasicStreamInjectionData)
{
UNREFERENCED_PARAMETER(rpcBindingHandle);
UNREFERENCED_PARAMETER(scenario);
ASSERT(pFilter);
ASSERT(scenario == SCENARIO_BASIC_STREAM_INJECTION);
ASSERT(changeType < FWPM_CHANGE_TYPE_MAX);
UINT32 status = NO_ERROR;
if(changeType == FWPM_CHANGE_ADD)
{
if(pPCBasicStreamInjectionData)
status = ScenarioBasicStreamInjectionAdd(pFilter,
pPCBasicStreamInjectionData);
else
{
status = ERROR_INVALID_PARAMETER;
HlprLogError(L"RpcInvokeScenarioBasicStreamInjection() [status: %#x][pPCBasicStreamInjectionData: %#x]",
status,
pPCBasicStreamInjectionData);
}
}
else
status = ScenarioBasicStreamInjectionRemove(pFilter);
return status;
}
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