Sample Code
Windows Driver Samples/ Windows Filtering Platform Sample/ C++/ sys/ ClassifyFunctions_PendAuthorizationCallouts.cpp/
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All Rights Reserved.//// Module Name:// ClassifyFunctions_PendAuthorizationCallouts.cpp//// Abstract:// This module contains WFP Classify functions for pending and completing authorizations.//// Naming Convention://// <Module><Scenario>// // i.e.//// ClassifyPendAuthorization//// <Module>// Classify - Function is an FWPS_CALLOUT_CLASSIFY_FN.// Perform - Function executes the desired scenario.// Prv - Function is a private helper to this module.// Trigger -// <Scenario>// PendAuthorization - Function demonstates pending authorization requests.//// Author:// Dusty Harper (DHarper)//// Private Functions:// PendAuthorizationWorkItemRoutine(),// PerformPendAuthorization(),// PrvCloneAuthorizedNBLAndInject()// TriggerPendAuthorizationOutOfBand(),//// Public Functions:// ClassifyPendAuthorization(),//// Revision History://// [ Month ][Day] [Year] - [Revision]-[ Comments ]// May 01, 2010 - 1.0 - Creation//////////////////////////////////////////////////////////////////////////////////////////////////////#include "Framework_WFPSamplerCalloutDriver.h" /// .#include "ClassifyFunctions_PendAuthorizationCallouts.tmh" /// $(OBJ_PATH)\$(O)\/** @private_function="PrvCloneAuthorizedNBLAndInject" Purpose: <br> <br> Notes: <br> <br> MSDN_Ref: <br>*/_IRQL_requires_min_(PASSIVE_LEVEL)_IRQL_requires_max_(DISPATCH_LEVEL)_IRQL_requires_same__Check_return__Success_(return == STATUS_SUCCESS)NTSTATUS PrvCloneAuthorizedNBLAndInject(_Inout_ CLASSIFY_DATA** ppClassifyData, _Inout_ INJECTION_DATA** ppInjectionData){#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " ---> PrvCloneAuthorizedNBLAndInject()\n");#endif /// DBG NT_ASSERT(ppClassifyData); NT_ASSERT(ppInjectionData); NT_ASSERT(*ppClassifyData); NT_ASSERT(*ppInjectionData); NTSTATUS status = STATUS_SUCCESS; FWPS_INCOMING_VALUES* pClassifyValues = (FWPS_INCOMING_VALUES*)(*ppClassifyData)->pClassifyValues; FWPS_INCOMING_METADATA_VALUES* pMetadata = (FWPS_INCOMING_METADATA_VALUES*)(*ppClassifyData)->pMetadataValues; UINT32 bytesRetreated = 0; COMPARTMENT_ID compartmentID = UNSPECIFIED_COMPARTMENT_ID; BOOLEAN isInbound = FALSE; NET_BUFFER_LIST* pNetBufferList = 0; PEND_AUTHORIZATION_COMPLETION_DATA* pCompletionData = 0; FWPS_TRANSPORT_SEND_PARAMS* pSendParams = 0; BYTE* pRemoteAddress = 0;#pragma warning(push)#pragma warning(disable: 6014) /// pCompletionData will be freed in completionFn using PendAuthorizationCompletionDataDestroy HLPR_NEW(pCompletionData, PEND_AUTHORIZATION_COMPLETION_DATA, WFPSAMPLER_CALLOUT_DRIVER_TAG); HLPR_BAIL_ON_ALLOC_FAILURE(pCompletionData, status); HLPR_NEW(pSendParams, FWPS_TRANSPORT_SEND_PARAMS, WFPSAMPLER_CALLOUT_DRIVER_TAG); HLPR_BAIL_ON_ALLOC_FAILURE(pSendParams, status);#pragma warning(pop) KeInitializeSpinLock(&(pCompletionData->spinLock)); pCompletionData->performedInline = FALSE; pCompletionData->pClassifyData = *ppClassifyData; pCompletionData->pInjectionData = *ppInjectionData; pCompletionData->pSendParams = pSendParams; /// Responsibility for freeing this memory has been transferred to the pCompletionData *ppClassifyData = 0; *ppInjectionData = 0; pSendParams = 0; if(pCompletionData->pInjectionData->direction == FWP_DIRECTION_INBOUND) isInbound = TRUE; if(FWPS_IS_METADATA_FIELD_PRESENT(pMetadata, FWPS_METADATA_FIELD_COMPARTMENT_ID)) compartmentID = (COMPARTMENT_ID)pMetadata->compartmentId; if(FWPS_IS_METADATA_FIELD_PRESENT(pMetadata, FWPS_METADATA_FIELD_IP_HEADER_SIZE)) bytesRetreated = pMetadata->ipHeaderSize; if(FWPS_IS_METADATA_FIELD_PRESENT(pMetadata, FWPS_METADATA_FIELD_TRANSPORT_HEADER_SIZE)) bytesRetreated += pMetadata->transportHeaderSize; if(pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_RECV_ACCEPT_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_RECV_ACCEPT_V6) { if(isInbound) /// NBL offset is at the start of the transport header ... { if(bytesRetreated) { /// so retreat (size of IP Header) to clone the whole NBL status = NdisRetreatNetBufferDataStart(NET_BUFFER_LIST_FIRST_NB((NET_BUFFER_LIST*)pCompletionData->pClassifyData->pPacket), bytesRetreated, 0, 0); if(status != STATUS_SUCCESS) { DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_ERROR_LEVEL, " !!!! PrvCloneAuthorizedNBLAndInject: NdisRetreatNetBufferDataStart() [status: %#x]\n", status); HLPR_BAIL; } } } } else if(pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_CONNECT_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_CONNECT_V6) { /// NBL offset is at the Transport Header, and no IP Header is present yet bytesRetreated = 0; isInbound = FALSE; } else { status = STATUS_FWP_INCOMPATIBLE_LAYER; HLPR_BAIL; } status = FwpsAllocateCloneNetBufferList((NET_BUFFER_LIST*)(pCompletionData->pClassifyData->pPacket), g_pNDISPoolData->nblPoolHandle, g_pNDISPoolData->nbPoolHandle, 0, &pNetBufferList); if(bytesRetreated) { /// Advance the NBL offset so we are back at the expected position in the NET_BUFFER_LIST NdisAdvanceNetBufferDataStart(NET_BUFFER_LIST_FIRST_NB((NET_BUFFER_LIST*)pCompletionData->pClassifyData->pPacket), bytesRetreated, FALSE, 0); } if(status != STATUS_SUCCESS) { DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_ERROR_LEVEL, " !!!! PrvCloneAuthorizedNBLAndInject : FwpsAllocateCloneNetBufferList() [status: %#x]\n", status); HLPR_BAIL; } if(isInbound) { FWP_VALUE* pInterfaceIndex = KrnlHlprFwpValueGetFromFwpsIncomingValues(pClassifyValues, &FWPM_CONDITION_INTERFACE_INDEX); FWP_VALUE* pSubInterfaceIndex = KrnlHlprFwpValueGetFromFwpsIncomingValues(pClassifyValues, &FWPM_CONDITION_SUB_INTERFACE_INDEX); IF_INDEX interfaceIndex = 0; IF_INDEX subInterfaceIndex = 0; if(pInterfaceIndex && pInterfaceIndex->type == FWP_UINT32) interfaceIndex = (IF_INDEX)pInterfaceIndex->uint32; if(pSubInterfaceIndex && pSubInterfaceIndex->type == FWP_UINT32) subInterfaceIndex = (IF_INDEX)pSubInterfaceIndex->uint32; status = FwpsInjectTransportReceiveAsync(pCompletionData->pInjectionData->injectionHandle, pCompletionData->pInjectionData->injectionContext, 0, 0, pCompletionData->pInjectionData->addressFamily, compartmentID, interfaceIndex, subInterfaceIndex, pNetBufferList, CompletePendAuthorization, pCompletionData); } else { UINT64 endpointHandle = 0; FWP_VALUE* pAddressValue = 0; if(FWPS_IS_METADATA_FIELD_PRESENT(pMetadata, FWPS_METADATA_FIELD_TRANSPORT_ENDPOINT_HANDLE)) endpointHandle = pMetadata->transportEndpointHandle; pAddressValue = KrnlHlprFwpValueGetFromFwpsIncomingValues(pClassifyValues, &FWPM_CONDITION_IP_REMOTE_ADDRESS); if(pAddressValue) { if(pCompletionData->pInjectionData->addressFamily == AF_INET) { UINT32 tempAddress = htonl(pAddressValue->uint32);#pragma warning(push)#pragma warning(disable: 6014) /// pRemoteAddress will be freed in completionFn using PendAuthorizationCompletionDataDestroy HLPR_NEW_ARRAY(pRemoteAddress, BYTE, IPV4_ADDRESS_SIZE, WFPSAMPLER_CALLOUT_DRIVER_TAG); HLPR_BAIL_ON_ALLOC_FAILURE(pRemoteAddress, status);#pragma warning(pop) RtlCopyMemory(pRemoteAddress, &tempAddress, IPV4_ADDRESS_SIZE); } else {#pragma warning(push)#pragma warning(disable: 6014) /// pRemoteAddress will be freed in completionFn using PendAuthorizationCompletionDataDestroy HLPR_NEW_ARRAY(pRemoteAddress, BYTE, IPV6_ADDRESS_SIZE, WFPSAMPLER_CALLOUT_DRIVER_TAG); HLPR_BAIL_ON_ALLOC_FAILURE(pRemoteAddress, status);#pragma warning(pop) RtlCopyMemory(pRemoteAddress, pAddressValue->byteArray16->byteArray16, IPV6_ADDRESS_SIZE); if(FWPS_IS_METADATA_FIELD_PRESENT(pMetadata, FWPS_METADATA_FIELD_REMOTE_SCOPE_ID)) pCompletionData->pSendParams->remoteScopeId = pMetadata->remoteScopeId; } pCompletionData->pSendParams->remoteAddress = pRemoteAddress; } pCompletionData->refCount = KrnlHlprNBLGetRequiredRefCount(pNetBufferList); status = FwpsInjectTransportSendAsync(pCompletionData->pInjectionData->injectionHandle, pCompletionData->pInjectionData->injectionContext, endpointHandle, 0, pCompletionData->pSendParams, pCompletionData->pInjectionData->addressFamily, compartmentID, pNetBufferList, CompletePendAuthorization, pCompletionData); } HLPR_BAIL_LABEL: if(status != STATUS_SUCCESS) { if(pNetBufferList) { FwpsFreeCloneNetBufferList(pNetBufferList, 0); pNetBufferList = 0; } if(pCompletionData) PendAuthorizationCompletionDataDestroy(&pCompletionData, TRUE); }#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " <--- PrvCloneAuthorizedNBLAndInject() [status: %#x]\n", status);#endif /// DBG return status;}/** @private_function="PerformPendAuthorization" Purpose: <br> <br> Notes: <br> <br> MSDN_Ref: <br>*/_IRQL_requires_min_(PASSIVE_LEVEL)_IRQL_requires_max_(DISPATCH_LEVEL)_IRQL_requires_same__Success_(return == STATUS_SUCCESS)NTSTATUS PerformPendAuthorization(_Inout_ CLASSIFY_DATA** ppClassifyData, _Inout_ PEND_DATA** ppPendData, _Inout_ INJECTION_DATA** ppInjectionData){#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " ---> PerformPendAuthorization()\n");#endif /// DBG NT_ASSERT(ppClassifyData); NT_ASSERT(ppPendData); NT_ASSERT(ppInjectionData); NT_ASSERT(*ppClassifyData); NT_ASSERT(*ppPendData); NTSTATUS status = STATUS_SUCCESS; NET_BUFFER_LIST* pNBL = (*ppPendData)->pNBL; UINT32 finalAction = (*ppPendData)->pPendAuthorizationData->finalAction; UINT32 delay = (*ppPendData)->pPendAuthorizationData->delay; BOOLEAN reInjected = FALSE; if(delay && KeGetCurrentIrql() < DISPATCH_LEVEL) KrnlHlprWorkItemSleep(delay);#pragma warning(push)#pragma warning(disable: 6001) /// *ppPendData initialized prior to call to this function /// Completes the Pend KrnlHlprPendDataDestroy(ppPendData);#pragma warning(pop) if(pNBL && finalAction == FWP_ACTION_PERMIT) { status = PrvCloneAuthorizedNBLAndInject(ppClassifyData, ppInjectionData); if(status != STATUS_SUCCESS) { DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_ERROR_LEVEL, " !!!! PerformPendAuthorization : PrvCloneAuthorizedNBLAndInject() [status: %#x]\n", status); } else reInjected = TRUE; }#pragma warning(push)#pragma warning(disable: 6001) /// *ppClassifyData initialized prior to call to this function if(!reInjected) KrnlHlprClassifyDataDestroyLocalCopy(ppClassifyData);#pragma warning(pop)#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " <--- PerformPendAuthorization() [status: %#x]\n", status);#endif /// DBG return status;};/** @private_function="PendAuthorizationDeferredProcedureCall" Purpose: Invokes the appropriate private injection routine to perform the injection at DISPATCH_LEVEL. <br> <br> Notes: <br> <br>*/_IRQL_requires_(DISPATCH_LEVEL)_IRQL_requires_same__Function_class_(KDEFERRED_ROUTINE)VOID PendAuthorizationDeferredProcedureCall(_In_ KDPC* pDPC, _In_opt_ PVOID pContext, _In_opt_ PVOID pArg1, _In_opt_ PVOID pArg2){#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " ---> PendAuthorizationDeferredProcedureCall()\n");#endif /// DBG UNREFERENCED_PARAMETER(pDPC); UNREFERENCED_PARAMETER(pContext); UNREFERENCED_PARAMETER(pArg2); NT_ASSERT(pDPC); NT_ASSERT(pArg1); NT_ASSERT(((DPC_DATA*)pArg1)->pClassifyData); NT_ASSERT(((DPC_DATA*)pArg1)->pInjectionData); DPC_DATA* pDPCData = (DPC_DATA*)pArg1; if(pDPCData) { NTSTATUS status = STATUS_SUCCESS; status = PerformPendAuthorization(&(pDPCData->pClassifyData), &(pDPCData->pPendData), (INJECTION_DATA**)&(pDPCData->pContext)); if(status != STATUS_SUCCESS) { if(pDPCData->pClassifyData) KrnlHlprClassifyDataDestroyLocalCopy(&(pDPCData->pClassifyData)); if(pDPCData->pInjectionData) KrnlHlprInjectionDataDestroy(&(pDPCData->pInjectionData)); DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_ERROR_LEVEL, " !!!! PendAuthorizationDeferredProcedureCall() [status: %#x]\n", status); } KrnlHlprDPCDataDestroy(&pDPCData); }#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " <--- PendAuthorizationDeferredProcedureCall()\n");#endif /// DBG return;}/** @private_function="PendAuthorizationWorkItemRoutine" Purpose: <br> <br> Notes: <br> <br> MSDN_Ref: <br>*/_IRQL_requires_(PASSIVE_LEVEL)_IRQL_requires_same__Function_class_(IO_WORKITEM_ROUTINE)VOID PendAuthorizationWorkItemRoutine(_In_ PDEVICE_OBJECT pDeviceObject, _In_opt_ PVOID pContext){#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " ---> PendAuthorizationWorkItemRoutine()\n");#endif /// DBG UNREFERENCED_PARAMETER(pDeviceObject); NT_ASSERT(pContext); NT_ASSERT(((WORKITEM_DATA*)pContext)->pClassifyData); NT_ASSERT(((WORKITEM_DATA*)pContext)->pInjectionData); WORKITEM_DATA* pWorkItemData = (WORKITEM_DATA*)pContext; if(pWorkItemData) { NTSTATUS status = STATUS_SUCCESS; status = PerformPendAuthorization(&(pWorkItemData->pClassifyData), &(pWorkItemData->pPendData), (INJECTION_DATA**)&(pWorkItemData->pContext)); if(status != STATUS_SUCCESS) { if(pWorkItemData->pClassifyData) KrnlHlprClassifyDataDestroyLocalCopy(&(pWorkItemData->pClassifyData)); if(pWorkItemData->pInjectionData) KrnlHlprInjectionDataDestroy(&(pWorkItemData->pInjectionData)); DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_ERROR_LEVEL, " !!!! PendAuthorizationWorkItemRoutine() [status: %#x]\n", status); } KrnlHlprWorkItemDataDestroy(&pWorkItemData); }#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " <--- PendAuthorizationWorkItemRoutine()\n");#endif /// DBG return;}/** @private_function="TriggerPendAuthorizationOutOfBand" Purpose: <br> <br> Notes: <br> <br> MSDN_Ref: <br>*/_IRQL_requires_min_(PASSIVE_LEVEL)_IRQL_requires_max_(DISPATCH_LEVEL)_IRQL_requires_same__Success_(return == STATUS_SUCCESS)NTSTATUS TriggerPendAuthorizationOutOfBand(_In_ const FWPS_INCOMING_VALUES* pClassifyValues, _In_ const FWPS_INCOMING_METADATA_VALUES* pMetadata, _Inout_opt_ VOID* pLayerData, _In_opt_ const VOID* pClassifyContext, _In_ const FWPS_FILTER* pFilter, _In_ UINT64 flowContext, _In_ FWPS_CLASSIFY_OUT* pClassifyOut, _Inout_opt_ INJECTION_DATA* pInjectionData, _Inout_ PEND_DATA* pPendData, _In_ PC_PEND_AUTHORIZATION_DATA* pPCData){#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " ---> TriggerPendAuthorizationOutOfBand()\n");#endif /// DBG NT_ASSERT(pClassifyValues); NT_ASSERT(pMetadata); NT_ASSERT(pFilter); NT_ASSERT(pClassifyOut); NT_ASSERT(pPendData); NT_ASSERT(pPCData); NTSTATUS status = STATUS_SUCCESS; CLASSIFY_DATA* pClassifyData = 0;#pragma warning(push)#pragma warning(disable: 6014) /// pInjectionData will be freed in completionFn using PendAuthorizationCompletionDataDestroy status = KrnlHlprClassifyDataCreateLocalCopy(&pClassifyData, pClassifyValues, pMetadata, pLayerData, pClassifyContext, pFilter, flowContext, pClassifyOut); HLPR_BAIL_ON_FAILURE(status);#pragma warning(pop) if(pPCData->useWorkItems || pPCData->delay) { /// introducing the delay requires PASSIVE_LEVEL, so force use of a Work Item status = KrnlHlprWorkItemQueue(g_pWDMDevice, PendAuthorizationWorkItemRoutine, pClassifyData, pPendData, (VOID*)pInjectionData); } else { if(pPCData->useThreadedDPC) status = KrnlHlprThreadedDPCQueue(PendAuthorizationDeferredProcedureCall, pClassifyData, pPendData, pInjectionData); else status = KrnlHlprDPCQueue(PendAuthorizationDeferredProcedureCall, pClassifyData, pPendData, pInjectionData); } HLPR_BAIL_ON_FAILURE(status); pClassifyOut->actionType = FWP_ACTION_BLOCK; HLPR_BAIL_LABEL: if(status != STATUS_SUCCESS) { if(pClassifyData) KrnlHlprClassifyDataDestroyLocalCopy(&pClassifyData); }#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " <--- TriggerPendAuthorizationOutOfBand() [status: %#x]\n", status);#endif /// DBG return status;}#if(NTDDI_VERSION >= NTDDI_WIN7)/** @classify_function="ClassifyPendAuthorization" Purpose: Classify Function which will pend an authorization request, and send the request for further processing to a worker thread. On a reauthorization the final decided action is returned as the actionType. <br> <br> Notes: Applies to the following layers: <br> FWPM_LAYER_ALE_RESOURCE_ASSIGNMENT_V4 <br> FWPM_LAYER_ALE_RESOURCE_ASSIGNMENT_V6 <br> FWPM_LAYER_ALE_AUTH_LISTEN_V4 <br> FWPM_LAYER_ALE_AUTH_LISTEN_V6 <br> FWPM_LAYER_ALE_AUTH_RECV_ACCEPT_V4 <br> FWPM_LAYER_ALE_AUTH_RECV_ACCEPT_V6 <br> FWPM_LAYER_ALE_AUTH_CONNECT_V4 <br> FWPM_LAYER_ALE_AUTH_CONNECT_V6 <br> <br>*/_IRQL_requires_min_(PASSIVE_LEVEL)_IRQL_requires_max_(DISPATCH_LEVEL)_IRQL_requires_same_VOID ClassifyPendAuthorization(_In_ const FWPS_INCOMING_VALUES* pClassifyValues, _In_ const FWPS_INCOMING_METADATA_VALUES* pMetadata, _Inout_opt_ VOID* pNetBufferList, _In_opt_ const VOID* pClassifyContext, _In_ const FWPS_FILTER* pFilter, _In_ UINT64 flowContext, _Inout_ FWPS_CLASSIFY_OUT* pClassifyOut){#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " ---> ClassifyPendAuthorization()\n");#endif /// DBG NT_ASSERT(pClassifyValues); NT_ASSERT(pMetadata); NT_ASSERT(pFilter); NT_ASSERT(pClassifyOut); NT_ASSERT(pClassifyValues->layerId == FWPS_LAYER_ALE_RESOURCE_ASSIGNMENT_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_RESOURCE_ASSIGNMENT_V6 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_LISTEN_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_LISTEN_V6 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_RECV_ACCEPT_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_RECV_ACCEPT_V6 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_CONNECT_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_CONNECT_V6); NT_ASSERT(pFilter->providerContext); NT_ASSERT(pFilter->providerContext->type == FWPM_GENERAL_CONTEXT); NT_ASSERT(pFilter->providerContext->dataBuffer); NT_ASSERT(pFilter->providerContext->dataBuffer->size == sizeof(PC_PEND_AUTHORIZATION_DATA)); NT_ASSERT(pFilter->providerContext->dataBuffer->data); NTSTATUS status = STATUS_SUCCESS; PC_PEND_AUTHORIZATION_DATA* pPendAuthorizationData = (PC_PEND_AUTHORIZATION_DATA*)pFilter->providerContext->dataBuffer->data; /// RESOURCE_ASSIGNTMENT & AUTH_LISTEN will Reauthorize after the completion of the pend. /// AUTH_CONNECT's completeOperation will trigger a Reauthorization if(KrnlHlprFwpsIncomingValueConditionFlagsAreSet(pClassifyValues, FWP_CONDITION_FLAG_IS_REAUTHORIZE)) { if(pClassifyOut->rights & FWPS_RIGHT_ACTION_WRITE) pClassifyOut->actionType = pPendAuthorizationData->finalAction; } else { BOOLEAN actionSet = FALSE; if(pClassifyOut->rights & FWPS_RIGHT_ACTION_WRITE) { INJECTION_DATA* pInjectionData = 0; PEND_DATA* pPendData = 0;#pragma warning(push)#pragma warning(disable: 6014) /// pInjectionData will be freed in completionFn using PendAuthorizationCompletionDataDestroy if(pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_RECV_ACCEPT_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_RECV_ACCEPT_V6 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_CONNECT_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_CONNECT_V6) { status = KrnlHlprInjectionDataCreate(&pInjectionData, pClassifyValues, pMetadata, (NET_BUFFER_LIST*)pNetBufferList); HLPR_BAIL_ON_FAILURE(status); }#pragma warning(pop) /// AUTH_RECV_ACCEPT's injection will be indicative of PERMIT if(pInjectionData && pInjectionData->injectionState == FWPS_PACKET_INJECTED_BY_SELF) { pClassifyOut->actionType = pPendAuthorizationData->finalAction; actionSet = TRUE; } else {#pragma warning(push)#pragma warning(disable: 6014) /// pPendData will be freed in completionFn using PendAuthorizationCompletionDataDestroy status = KrnlHlprPendDataCreate(&pPendData, pMetadata, (NET_BUFFER_LIST*)pNetBufferList, pFilter); HLPR_BAIL_ON_FAILURE(status);#pragma warning(pop) status = TriggerPendAuthorizationOutOfBand(pClassifyValues, pMetadata, pNetBufferList, pClassifyContext, pFilter, flowContext, pClassifyOut, pInjectionData, pPendData, pPendAuthorizationData); } HLPR_BAIL_LABEL: if(status != STATUS_SUCCESS) { DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_ERROR_LEVEL, " !!!! ClassifyPendAuthorization() [status: %#x]\n", status); if(pInjectionData) KrnlHlprInjectionDataDestroy(&pInjectionData); if(pPendData) KrnlHlprPendDataDestroy(&pPendData); } if(!actionSet) { pClassifyOut->actionType = FWP_ACTION_BLOCK; pClassifyOut->flags |= FWPS_CLASSIFY_OUT_FLAG_ABSORB; } } }#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " <--- ClassifyPendAuthorization()\n");#endif /// DBG return;}#else/** @classify_function="ClassifyPendAuthorization" Purpose: Classify Function which will pend an authorization request, and send the request for further processing to a worker thread. On a reauthorization the final decided action is returned as the actionType. <br> <br> Notes: Applies to the following layers: <br> FWPM_LAYER_ALE_RESOURCE_ASSIGNMENT_V4 <br> FWPM_LAYER_ALE_RESOURCE_ASSIGNMENT_V6 <br> FWPM_LAYER_ALE_AUTH_LISTEN_V4 <br> FWPM_LAYER_ALE_AUTH_LISTEN_V6 <br> FWPM_LAYER_ALE_AUTH_RECV_ACCEPT_V4 <br> FWPM_LAYER_ALE_AUTH_RECV_ACCEPT_V6 <br> FWPM_LAYER_ALE_AUTH_CONNECT_V4 <br> FWPM_LAYER_ALE_AUTH_CONNECT_V6 <br> <br>*/_IRQL_requires_min_(PASSIVE_LEVEL)_IRQL_requires_max_(DISPATCH_LEVEL)_IRQL_requires_same_VOID ClassifyPendAuthorization(_In_ const FWPS_INCOMING_VALUES* pClassifyValues, _In_ const FWPS_INCOMING_METADATA_VALUES* pMetadata, _Inout_opt_ VOID* pNetBufferList, _In_ const FWPS_FILTER* pFilter, _In_ UINT64 flowContext, _Inout_ FWPS_CLASSIFY_OUT* pClassifyOut){#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " ---> ClassifyPendAuthorization()\n");#endif /// DBG NT_ASSERT(pClassifyValues); NT_ASSERT(pMetadata); NT_ASSERT(pFilter); NT_ASSERT(pClassifyOut); NT_ASSERT(pClassifyValues->layerId == FWPS_LAYER_ALE_RESOURCE_ASSIGNMENT_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_RESOURCE_ASSIGNMENT_V6 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_LISTEN_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_LISTEN_V6 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_RECV_ACCEPT_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_RECV_ACCEPT_V6 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_CONNECT_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_CONNECT_V6); NT_ASSERT(pFilter->providerContext); NT_ASSERT(pFilter->providerContext->type == FWPM_GENERAL_CONTEXT); NT_ASSERT(pFilter->providerContext->dataBuffer); NT_ASSERT(pFilter->providerContext->dataBuffer->size == sizeof(PC_PEND_AUTHORIZATION_DATA)); NT_ASSERT(pFilter->providerContext->dataBuffer->data); NTSTATUS status = STATUS_SUCCESS; PC_PEND_AUTHORIZATION_DATA* pPendAuthorizationData = (PC_PEND_AUTHORIZATION_DATA*)pFilter->providerContext->dataBuffer->data; /// RESOURCE_ASSIGNTMENT & AUTH_LISTEN will Reauthorize after the completion of the pend. /// AUTH_CONNECT's completeOperation will trigger a Reauthorization if(KrnlHlprFwpsIncomingValueConditionFlagsAreSet(pClassifyValues, FWP_CONDITION_FLAG_IS_REAUTHORIZE)) { if(pClassifyOut->rights & FWPS_RIGHT_ACTION_WRITE) pClassifyOut->actionType = pPendAuthorizationData->finalAction; } else { BOOLEAN actionSet = FALSE; if(pClassifyOut->rights & FWPS_RIGHT_ACTION_WRITE) { INJECTION_DATA* pInjectionData = 0; PEND_DATA* pPendData = 0;#pragma warning(push)#pragma warning(disable: 6014) /// pInjectionData will be freed in completionFn using PendAuthorizationCompletionDataDestroy if(pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_RECV_ACCEPT_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_RECV_ACCEPT_V6 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_CONNECT_V4 || pClassifyValues->layerId == FWPS_LAYER_ALE_AUTH_CONNECT_V6) { status = KrnlHlprInjectionDataCreate(&pInjectionData, pClassifyValues, pMetadata, (NET_BUFFER_LIST*)pNetBufferList); HLPR_BAIL_ON_FAILURE(status); }#pragma warning(pop) /// AUTH_RECV_ACCEPT's injection will be indicative of PERMIT if(pInjectionData && pInjectionData->injectionState == FWPS_PACKET_INJECTED_BY_SELF) { pClassifyOut->actionType = pPendAuthorizationData->finalAction; actionSet = TRUE; } else {#pragma warning(push)#pragma warning(disable: 6014) /// pInjectionData will be freed in completionFn using PendAuthorizationCompletionDataDestroy status = KrnlHlprPendDataCreate(&pPendData, pMetadata, (NET_BUFFER_LIST*)pNetBufferList, pFilter); HLPR_BAIL_ON_FAILURE(status);#pragma warning(pop) status = TriggerPendAuthorizationOutOfBand(pClassifyValues, pMetadata, pNetBufferList, 0, pFilter, flowContext, pClassifyOut, pInjectionData, pPendData, pPendAuthorizationData); } HLPR_BAIL_LABEL: if(status != STATUS_SUCCESS) { DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_ERROR_LEVEL, " !!!! ClassifyPendAuthorization() [status: %#x]\n", status); if(pInjectionData) KrnlHlprInjectionDataDestroy(&pInjectionData); if(pPendData) KrnlHlprPendDataDestroy(&pPendData); } if(!actionSet) { pClassifyOut->actionType = FWP_ACTION_BLOCK; pClassifyOut->flags |= FWPS_CLASSIFY_OUT_FLAG_ABSORB; } } }#if DBG DbgPrintEx(DPFLTR_IHVNETWORK_ID, DPFLTR_INFO_LEVEL, " <--- ClassifyPendAuthorization()\n");#endif /// DBG return;}#endif // (NTDDI_VERSION >= NTDDI_WIN7) |
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