mirror of
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8db8073cbb
svn path=/branches/shell-experiments/; revision=63271
241 lines
7 KiB
C
241 lines
7 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Kernel Streaming
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* FILE: drivers/ksfilter/ks/topoology.c
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* PURPOSE: KS Allocator functions
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* PROGRAMMER: Johannes Anderwald
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*/
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#include "precomp.h"
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#define NDEBUG
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#include <debug.h>
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NTSTATUS
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NTAPI
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KspCreateObjectType(
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IN HANDLE ParentHandle,
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IN LPWSTR ObjectType,
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PVOID CreateParameters,
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UINT CreateParametersSize,
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IN ACCESS_MASK DesiredAccess,
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OUT PHANDLE NodeHandle)
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{
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NTSTATUS Status;
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IO_STATUS_BLOCK IoStatusBlock;
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OBJECT_ATTRIBUTES ObjectAttributes;
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UNICODE_STRING Name;
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/* calculate request length */
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Name.Length = 0;
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Name.MaximumLength = (USHORT)(wcslen(ObjectType) * sizeof(WCHAR) + CreateParametersSize + 1 * sizeof(WCHAR));
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Name.MaximumLength += sizeof(WCHAR);
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/* acquire request buffer */
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Name.Buffer = AllocateItem(NonPagedPool, Name.MaximumLength);
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/* check for success */
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if (!Name.Buffer)
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{
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/* insufficient resources */
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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/* build a request which looks like {ObjectClass}\CreateParameters
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* For pins the parent is the reference string used in registration
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* For clocks it is full path for pin\{ClockGuid}\ClockCreateParams
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*/
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RtlAppendUnicodeToString(&Name, ObjectType);
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RtlAppendUnicodeToString(&Name, L"\\");
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/* append create parameters */
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RtlMoveMemory(Name.Buffer + (Name.Length / sizeof(WCHAR)), CreateParameters, CreateParametersSize);
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Name.Length += CreateParametersSize;
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Name.Buffer[Name.Length / 2] = L'\0';
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InitializeObjectAttributes(&ObjectAttributes, &Name, OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE | OBJ_OPENIF, ParentHandle, NULL);
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/* create the instance */
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Status = IoCreateFile(NodeHandle,
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DesiredAccess,
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&ObjectAttributes,
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&IoStatusBlock,
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NULL,
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0,
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0,
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FILE_OPEN,
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0,
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NULL,
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0,
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CreateFileTypeNone,
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NULL,
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IO_NO_PARAMETER_CHECKING | IO_FORCE_ACCESS_CHECK);
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/* free request buffer */
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FreeItem(Name.Buffer);
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return Status;
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}
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/*
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@implemented
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*/
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KSDDKAPI NTSTATUS NTAPI
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KsCreateTopologyNode(
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IN HANDLE ParentHandle,
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IN PKSNODE_CREATE NodeCreate,
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IN ACCESS_MASK DesiredAccess,
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OUT PHANDLE NodeHandle)
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{
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return KspCreateObjectType(ParentHandle,
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KSSTRING_TopologyNode,
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(PVOID)NodeCreate,
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sizeof(KSNODE_CREATE),
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DesiredAccess,
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NodeHandle);
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}
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/*
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@implemented
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*/
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KSDDKAPI
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NTSTATUS
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NTAPI
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KsValidateTopologyNodeCreateRequest(
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IN PIRP Irp,
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IN PKSTOPOLOGY Topology,
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OUT PKSNODE_CREATE* OutNodeCreate)
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{
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PKSNODE_CREATE NodeCreate;
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ULONG Size;
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NTSTATUS Status;
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/* did the caller miss the topology */
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if (!Topology)
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return STATUS_INVALID_PARAMETER;
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/* set create param size */
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Size = sizeof(KSNODE_CREATE);
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/* fetch create parameters */
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Status = KspCopyCreateRequest(Irp,
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KSSTRING_TopologyNode,
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&Size,
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(PVOID*)&NodeCreate);
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if (!NT_SUCCESS(Status))
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return Status;
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if (NodeCreate->CreateFlags != 0 || (NodeCreate->Node >= Topology->TopologyNodesCount && NodeCreate->Node != MAXULONG))
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{
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/* invalid node create */
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FreeItem(NodeCreate);
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return STATUS_UNSUCCESSFUL;
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}
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/* store result */
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*OutNodeCreate = NodeCreate;
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return Status;
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}
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/*
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@implemented
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*/
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KSDDKAPI
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NTSTATUS
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NTAPI
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KsTopologyPropertyHandler(
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IN PIRP Irp,
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IN PKSPROPERTY Property,
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IN OUT PVOID Data,
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IN const KSTOPOLOGY* Topology)
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{
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KSP_NODE * Node;
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PIO_STACK_LOCATION IoStack;
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NTSTATUS Status;
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PKEY_VALUE_PARTIAL_INFORMATION KeyInfo;
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LPGUID Guid;
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IoStack = IoGetCurrentIrpStackLocation(Irp);
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DPRINT("KsTopologyPropertyHandler Irp %p Property %p Data %p Topology %p OutputLength %lu PropertyId %lu\n", Irp, Property, Data, Topology, IoStack->Parameters.DeviceIoControl.OutputBufferLength, Property->Id);
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if (Property->Flags != KSPROPERTY_TYPE_GET)
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{
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Irp->IoStatus.Status = STATUS_NOT_IMPLEMENTED;
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Irp->IoStatus.Information = 0;
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return STATUS_NOT_IMPLEMENTED;
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}
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switch(Property->Id)
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{
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case KSPROPERTY_TOPOLOGY_CATEGORIES:
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return KsHandleSizedListQuery(Irp, Topology->CategoriesCount, sizeof(GUID), Topology->Categories);
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case KSPROPERTY_TOPOLOGY_NODES:
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return KsHandleSizedListQuery(Irp, Topology->TopologyNodesCount, sizeof(GUID), Topology->TopologyNodes);
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case KSPROPERTY_TOPOLOGY_CONNECTIONS:
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return KsHandleSizedListQuery(Irp, Topology->TopologyConnectionsCount, sizeof(KSTOPOLOGY_CONNECTION), Topology->TopologyConnections);
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case KSPROPERTY_TOPOLOGY_NAME:
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Node = (KSP_NODE*)Property;
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/* check for invalid node id */
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if (Node->NodeId >= Topology->TopologyNodesCount)
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{
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/* invalid node id */
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Irp->IoStatus.Information = 0;
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Status = STATUS_INVALID_PARAMETER;
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break;
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}
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/* check if there is a name supplied */
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if (!IsEqualGUIDAligned(&Topology->TopologyNodesNames[Node->NodeId], &GUID_NULL))
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{
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/* node name has been supplied */
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Guid = (LPGUID)&Topology->TopologyNodesNames[Node->NodeId];
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}
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else
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{
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/* fallback to topology node type */
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Guid = (LPGUID)&Topology->TopologyNodes[Node->NodeId];
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}
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/* read topology node name */
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Status = KspReadMediaCategory(Guid, &KeyInfo);
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if (!NT_SUCCESS(Status))
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{
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Irp->IoStatus.Information = 0;
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break;
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}
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/* store result size */
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Irp->IoStatus.Information = KeyInfo->DataLength + sizeof(WCHAR);
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/* check for buffer overflow */
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if (KeyInfo->DataLength + sizeof(WCHAR) > IoStack->Parameters.DeviceIoControl.OutputBufferLength)
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{
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/* buffer too small */
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Status = STATUS_BUFFER_OVERFLOW;
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FreeItem(KeyInfo);
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break;
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}
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/* copy result buffer */
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RtlMoveMemory(Irp->UserBuffer, &KeyInfo->Data, KeyInfo->DataLength);
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/* zero terminate it */
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((LPWSTR)Irp->UserBuffer)[KeyInfo->DataLength / sizeof(WCHAR)] = L'\0';
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/* free key info */
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FreeItem(KeyInfo);
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break;
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default:
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Irp->IoStatus.Information = 0;
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Status = STATUS_NOT_FOUND;
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}
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return Status;
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}
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