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2458 lines
81 KiB
2458 lines
81 KiB
/*++
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Copyright (c) 1996 Microsoft Corporation
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Module Name:
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util.c
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Abstract
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Internal utility functions for the HID class driver.
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Authors:
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Ervin P.
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Environment:
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Kernel mode only
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Revision History:
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--*/
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#include "pch.h"
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, HidpAddDevice)
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#pragma alloc_text(PAGE, HidpDriverUnload)
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#pragma alloc_text(PAGE, HidpGetDeviceDescriptor)
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#pragma alloc_text(PAGE, HidpQueryDeviceCapabilities)
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#pragma alloc_text(PAGE, HidpQueryIdForClientPdo)
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#pragma alloc_text(PAGE, SubstituteBusNames)
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#pragma alloc_text(PAGE, BuildCompatibleID)
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#pragma alloc_text(PAGE, HidpQueryCollectionCapabilities)
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#pragma alloc_text(PAGE, HidpCreateClientPDOs)
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#pragma alloc_text(PAGE, MakeClientPDOName)
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#pragma alloc_text(PAGE, HidpCreateSymbolicLink)
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#pragma alloc_text(PAGE, HidpQueryInterface)
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#endif
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/*
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********************************************************************************
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* HidpCopyInputReportToUser
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********************************************************************************
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*
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* Copy a read report into a user's buffer.
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*
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* Note: ReportData is already "cooked" (already has report-id byte at start of report).
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*
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*/
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NTSTATUS HidpCopyInputReportToUser(
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IN PHIDCLASS_FILE_EXTENSION FileExtension,
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IN PUCHAR ReportData,
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IN OUT PULONG UserBufferLen,
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OUT PUCHAR UserBuffer
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)
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{
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NTSTATUS result = STATUS_DEVICE_DATA_ERROR;
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ULONG reportId;
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PHIDP_REPORT_IDS reportIdentifier;
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FDO_EXTENSION *fdoExtension = FileExtension->fdoExt;
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RUNNING_DISPATCH();
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ASSERT(fdoExtension->deviceDesc.CollectionDescLength > 0);
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reportId = (ULONG)*ReportData;
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reportIdentifier = GetReportIdentifier(fdoExtension, reportId);
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if (reportIdentifier){
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PHIDP_COLLECTION_DESC collectionDesc;
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PHIDCLASS_COLLECTION hidpCollection;
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collectionDesc = GetCollectionDesc(fdoExtension, reportIdentifier->CollectionNumber);
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hidpCollection = GetHidclassCollection(fdoExtension, reportIdentifier->CollectionNumber);
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if (collectionDesc && hidpCollection){
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ULONG reportLength = collectionDesc->InputLength;
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if (*UserBufferLen >= reportLength){
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RtlCopyMemory(UserBuffer, ReportData, reportLength);
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result = STATUS_SUCCESS;
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}
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else {
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result = STATUS_INVALID_BUFFER_SIZE;
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}
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/*
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* Return the actual length of the report (whether we copied or not).
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*/
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*UserBufferLen = reportLength;
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}
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}
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ASSERT((result == STATUS_SUCCESS) || (result == STATUS_INVALID_BUFFER_SIZE));
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return result;
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}
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/*
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********************************************************************************
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* HidpAddDevice
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********************************************************************************
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*
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* Routine Description:
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*
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* This routine is called by configmgr when a new PDO is dected.
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* It creates an Functional Device Object (FDO) and attaches it to the
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* PDO.
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*
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* Arguments:
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*
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* DriverObject - pointer to the minidriver's driver object.
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*
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* PhysicalDeviceObject - pointer to the PDO that the minidriver got in it's
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* AddDevice() routine.
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*
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* Return Value:
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*
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* Standard NT return value.
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*
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*/
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NTSTATUS HidpAddDevice(IN PDRIVER_OBJECT DriverObject, IN PDEVICE_OBJECT PhysicalDeviceObject)
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{
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PHIDCLASS_DRIVER_EXTENSION hidDriverExtension;
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PHIDCLASS_DEVICE_EXTENSION hidClassExtension;
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NTSTATUS status;
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UNICODE_STRING uPdoName;
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PWSTR wPdoName;
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PVOID miniDeviceExtension;
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ULONG totalExtensionSize;
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ULONG thisHidId;
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PDEVICE_OBJECT functionalDeviceObject;
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PAGED_CODE();
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DBG_COMMON_ENTRY()
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DBG_RECORD_DEVOBJ(PhysicalDeviceObject, "minidrvr PDO")
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//
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// Get a pointer to our per-driver extension, make sure it's one of ours.
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//
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hidDriverExtension = RefDriverExt(DriverObject);
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if (hidDriverExtension){
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ASSERT(DriverObject == hidDriverExtension->MinidriverObject);
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//
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// Construct a name for the FDO. The only requirement, really, is
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// that it's unique. For now we'll call them "_HIDx", where 'x' is some
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// unique number.
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//
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/*
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* PDO name has form "\Device\_HIDx".
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*/
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wPdoName = ALLOCATEPOOL(NonPagedPool, sizeof(L"\\Device\\_HID00000000"));
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if (wPdoName){
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//
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// Get the current value of NextHidId and increment it. Since
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// InterlockedIncrement() returns the incremented value, subtract one to
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// get the pre-increment value of NextHidId;
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//
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thisHidId = InterlockedIncrement(&HidpNextHidNumber) - 1;
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StringCbPrintfW(wPdoName,
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sizeof(L"\\Device\\_HID00000000"),
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L"\\Device\\_HID%08x", thisHidId);
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RtlInitUnicodeString(&uPdoName, wPdoName);
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//
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// We've got a counted-string version of the device object name. Calculate
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// the total size of the device extension and create the FDO.
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//
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totalExtensionSize = sizeof(HIDCLASS_DEVICE_EXTENSION) +
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hidDriverExtension->DeviceExtensionSize;
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status = IoCreateDevice( DriverObject, // driver object
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totalExtensionSize, // extension size
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&uPdoName, // name of the FDO
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FILE_DEVICE_UNKNOWN, //
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0, // DeviceCharacteristics
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FALSE, // not exclusive
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&functionalDeviceObject );
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if (NT_SUCCESS(status)){
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DBG_RECORD_DEVOBJ(functionalDeviceObject, "device FDO")
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ObReferenceObject(functionalDeviceObject);
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ASSERT(DriverObject->DeviceObject == functionalDeviceObject);
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ASSERT(functionalDeviceObject->DriverObject == DriverObject);
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//
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// We've created the device object. Fill in the minidriver's extension
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// pointer and attach this FDO to the PDO.
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//
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hidClassExtension = functionalDeviceObject->DeviceExtension;
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RtlZeroMemory(hidClassExtension, totalExtensionSize);
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hidClassExtension->isClientPdo = FALSE;
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//
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// Assign the name of the minidriver's PDO to our FDO.
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//
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hidClassExtension->fdoExt.name = uPdoName;
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//
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// The minidriver extension lives in the device extension and starts
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// immediately after our HIDCLASS_DEVICE_EXTENSION structure. Note
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// that the first structure in the HIDCLASS_DEVICE_EXTENSION is the
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// public HID_DEVICE_EXTENSION structure, which is where the pointer
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// to the minidriver's per-device extension area lives.
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//
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miniDeviceExtension = (PVOID)(hidClassExtension + 1);
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hidClassExtension->hidExt.MiniDeviceExtension = miniDeviceExtension;
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//
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// Get a pointer to the physical device object passed in. This device
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// object should already have the DO_DEVICE_INITIALIZING flag cleared.
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//
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ASSERT( (PhysicalDeviceObject->Flags & DO_DEVICE_INITIALIZING) == 0 );
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//
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// Attach the FDO to the PDO, storing the device object at the top of the
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// stack in our device extension.
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//
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hidClassExtension->hidExt.NextDeviceObject =
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IoAttachDeviceToDeviceStack( functionalDeviceObject,
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PhysicalDeviceObject );
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ASSERT(DriverObject->DeviceObject == functionalDeviceObject);
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ASSERT(functionalDeviceObject->DriverObject == DriverObject);
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//
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// The functional device requires two stack locations: one for the class
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// driver, and one for the minidriver.
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//
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functionalDeviceObject->StackSize++;
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//
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// We'll need a pointer to the physical device object as well for PnP
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// purposes. Note that it's a virtual certainty that NextDeviceObject
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// and PhysicalDeviceObject are identical.
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//
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hidClassExtension->hidExt.PhysicalDeviceObject = PhysicalDeviceObject;
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hidClassExtension->Signature = HID_DEVICE_EXTENSION_SIG;
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hidClassExtension->fdoExt.fdo = functionalDeviceObject;
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hidClassExtension->fdoExt.driverExt = hidDriverExtension;
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hidClassExtension->fdoExt.outstandingRequests = 0;
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hidClassExtension->fdoExt.openCount = 0;
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hidClassExtension->fdoExt.state = DEVICE_STATE_INITIALIZED;
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hidClassExtension->fdoExt.isPresent = TRUE;
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KeInitializeSpinLock(&hidClassExtension->fdoExt.presentSpinLock);
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hidClassExtension->fdoExt.presentReported = TRUE;
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//
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// Selective suspend portion.
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//
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hidClassExtension->fdoExt.idleState = IdleDisabled;
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hidClassExtension->fdoExt.idleTimeoutValue = BAD_POINTER;
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KeInitializeSpinLock(&hidClassExtension->fdoExt.idleNotificationSpinLock);
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KeInitializeEvent(&hidClassExtension->fdoExt.idleDoneEvent, NotificationEvent, TRUE);
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hidClassExtension->fdoExt.idleNotificationRequest = BAD_POINTER;
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hidClassExtension->fdoExt.idleCallbackInfo.IdleCallback = HidpIdleNotificationCallback;
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hidClassExtension->fdoExt.idleCallbackInfo.IdleContext = (PVOID) hidClassExtension;
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hidClassExtension->fdoExt.systemPowerState = PowerSystemWorking;
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hidClassExtension->fdoExt.devicePowerState = PowerDeviceD0;
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hidClassExtension->fdoExt.waitWakeIrp = BAD_POINTER;
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KeInitializeSpinLock(&hidClassExtension->fdoExt.waitWakeSpinLock);
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hidClassExtension->fdoExt.isWaitWakePending = FALSE;
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InitializeListHead(&hidClassExtension->fdoExt.collectionWaitWakeIrpQueue);
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KeInitializeSpinLock(&hidClassExtension->fdoExt.collectionWaitWakeIrpQueueSpinLock);
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InitializeListHead(&hidClassExtension->fdoExt.collectionPowerDelayedIrpQueue);
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KeInitializeSpinLock(&hidClassExtension->fdoExt.collectionPowerDelayedIrpQueueSpinLock);
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hidClassExtension->fdoExt.numPendingPowerDelayedIrps = 0;
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hidClassExtension->fdoExt.BusNumber = thisHidId;
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#if DBG
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InitFdoExtDebugInfo(hidClassExtension);
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#endif
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EnqueueFdoExt(&hidClassExtension->fdoExt);
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/*
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* Indicate that this device object does direct I/O.
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*
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* Set the flag that causes the IO subsystem to decrement the device
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* object's reference count *before* sending down IRP_MJ_CLOSEs. We
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* need this because we delete the device object on the last close.
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*/
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functionalDeviceObject->Flags |= DO_DIRECT_IO;
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/*
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* The DO_POWER_PAGABLE bit of a device object
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* indicates to the kernel that the power-handling
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* code of the corresponding driver is pageable, and
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* so must be called at IRQL 0.
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* As a filter driver, we do not want to change the power
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* behavior of the driver stack in any way; therefore,
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* we copy this bit from the lower device object.
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*/
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functionalDeviceObject->Flags |= (PhysicalDeviceObject->Flags & DO_POWER_PAGABLE);
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/*
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* Must clear the initializing flag after initialization complete.
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*/
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functionalDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
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//
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// Since we have NOT seen a start device, we CANNOT send any non
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// pnp irps to the device yet. We need to do that in the start
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// device requests.
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//
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//
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// Call the minidriver to let it do any extension initialization
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//
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status = hidDriverExtension->AddDevice(DriverObject, functionalDeviceObject);
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if (!NT_SUCCESS(status)) {
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DequeueFdoExt(&hidClassExtension->fdoExt);
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IoDetachDevice(hidClassExtension->hidExt.NextDeviceObject);
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ObDereferenceObject(functionalDeviceObject);
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IoDeleteDevice(functionalDeviceObject);
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ExFreePool( wPdoName );
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}
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}
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else {
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DBGWARN(("IoCreateDevice failed with status: %x", status));
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ExFreePool( wPdoName );
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}
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}
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else {
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DBGWARN(("Pool allocation for fdo name failed."));
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status = STATUS_INSUFFICIENT_RESOURCES;
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}
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if (!NT_SUCCESS(status)){
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DerefDriverExt(DriverObject);
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}
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}
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else {
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ASSERT(hidDriverExtension);
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status = STATUS_DEVICE_CONFIGURATION_ERROR;
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}
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DBGSUCCESS(status, TRUE)
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DBG_COMMON_EXIT()
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return status;
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}
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/*
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********************************************************************************
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* HidpDriverUnload
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********************************************************************************
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*
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*
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*/
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VOID HidpDriverUnload(IN struct _DRIVER_OBJECT *minidriverObject)
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{
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PHIDCLASS_DRIVER_EXTENSION hidDriverExt;
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PAGED_CODE();
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DBG_COMMON_ENTRY()
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/*
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* This extra de-reference will cause our hidDriverExtension's
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* reference count to eventually go to -1; at that time, we'll
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* dequeue it.
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*/
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hidDriverExt = DerefDriverExt(minidriverObject);
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ASSERT(hidDriverExt);
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/*
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* Chain the unload call to the minidriver.
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*/
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hidDriverExt->DriverUnload(minidriverObject);
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DBG_COMMON_EXIT()
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}
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NTSTATUS GetHIDRawReportDescriptor(FDO_EXTENSION *fdoExt, PIRP irp, ULONG descriptorLen)
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{
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NTSTATUS status;
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if (descriptorLen){
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PUCHAR rawReportDescriptor = ALLOCATEPOOL(NonPagedPool, descriptorLen);
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if (rawReportDescriptor){
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const ULONG retries = 3;
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ULONG i;
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for (i = 0; i < retries; i++){
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PIO_STACK_LOCATION irpSp;
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irp->UserBuffer = rawReportDescriptor;
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irpSp = IoGetNextIrpStackLocation(irp);
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ASSERT(irpSp->Parameters.DeviceIoControl.InputBufferLength == 0);
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ASSERT(irpSp->Parameters.DeviceIoControl.Type3InputBuffer == NULL);
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irpSp->MajorFunction = IRP_MJ_INTERNAL_DEVICE_CONTROL;
|
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irpSp->Parameters.DeviceIoControl.OutputBufferLength = descriptorLen;
|
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irpSp->Parameters.DeviceIoControl.IoControlCode = IOCTL_HID_GET_REPORT_DESCRIPTOR;
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|
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//
|
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// Call the minidriver to get the report descriptor.
|
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//
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status = HidpCallDriverSynchronous(fdoExt->fdo, irp);
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if (NT_SUCCESS(status)){
|
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if (irp->IoStatus.Information == descriptorLen){
|
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fdoExt->rawReportDescriptionLength = descriptorLen;
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fdoExt->rawReportDescription = rawReportDescriptor;
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break;
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} else {
|
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DBGWARN(("GetHIDRawReportDescriptor (attempt #%d) returned %xh/%xh bytes", i, irp->IoStatus.Information, descriptorLen))
|
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status = STATUS_DEVICE_DATA_ERROR;
|
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}
|
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} else {
|
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DBGWARN(("GetHIDRawReportDescriptor (attempt #%d) failed with status %xh.", i, status))
|
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}
|
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}
|
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|
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if (!NT_SUCCESS(status)){
|
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DBGWARN(("GetHIDRawReportDescriptor failed %d times.", retries))
|
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ExFreePool(rawReportDescriptor);
|
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}
|
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|
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} else {
|
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DBGWARN(("alloc failed in GetHIDRawReportDescriptor"))
|
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status = STATUS_INSUFFICIENT_RESOURCES;
|
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}
|
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}
|
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else {
|
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DBGWARN(("GetHIDRawReportDescriptor: descriptorLen is zero."))
|
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status = STATUS_DEVICE_DATA_ERROR;
|
|
}
|
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|
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DBGSUCCESS(status, FALSE)
|
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return status;
|
|
}
|
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|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpGetDeviceDescriptor
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
NTSTATUS HidpGetDeviceDescriptor(FDO_EXTENSION *fdoExtension)
|
|
{
|
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PIRP irp;
|
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PIO_STACK_LOCATION irpSp;
|
|
NTSTATUS status;
|
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PHID_DESCRIPTOR hidDescriptor;
|
|
ULONG rawReportDescriptorLength;
|
|
|
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PAGED_CODE();
|
|
|
|
|
|
/*
|
|
* Retrieve:
|
|
*
|
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* 1. Device descriptor (fixed portion)
|
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* 2. Device attributes
|
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* 3. Report descriptor
|
|
*/
|
|
|
|
hidDescriptor = &fdoExtension->hidDescriptor;
|
|
|
|
irp = IoAllocateIrp(fdoExtension->fdo->StackSize, FALSE);
|
|
if (irp){
|
|
irpSp = IoGetNextIrpStackLocation(irp);
|
|
irpSp->MajorFunction = IRP_MJ_INTERNAL_DEVICE_CONTROL;
|
|
irpSp->Parameters.DeviceIoControl.IoControlCode = IOCTL_HID_GET_DEVICE_DESCRIPTOR;
|
|
|
|
/*
|
|
* This IOCTL uses buffering type METHOD_NEITHER, so
|
|
* the buffer is simply passed in irp->UserBuffer.
|
|
*/
|
|
irp->UserBuffer = hidDescriptor;
|
|
irpSp->Parameters.DeviceIoControl.OutputBufferLength = sizeof(HID_DESCRIPTOR);
|
|
irpSp->Parameters.DeviceIoControl.Type3InputBuffer = NULL;
|
|
|
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status = HidpCallDriverSynchronous(fdoExtension->fdo, irp);
|
|
DBGASSERT((status == STATUS_SUCCESS),
|
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("STATUS_SUCCESS not returned, %x returned",status),
|
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TRUE)
|
|
|
|
if (status == STATUS_SUCCESS){
|
|
|
|
if (irp->IoStatus.Information == sizeof(HID_DESCRIPTOR)){
|
|
|
|
irpSp = IoGetNextIrpStackLocation(irp);
|
|
|
|
ASSERT(irpSp->MajorFunction == IRP_MJ_INTERNAL_DEVICE_CONTROL);
|
|
ASSERT(irpSp->Parameters.DeviceIoControl.InputBufferLength == 0);
|
|
ASSERT(!irpSp->Parameters.DeviceIoControl.Type3InputBuffer);
|
|
|
|
irpSp->Parameters.DeviceIoControl.IoControlCode = IOCTL_HID_GET_DEVICE_ATTRIBUTES;
|
|
|
|
irp->UserBuffer = &fdoExtension->hidDeviceAttributes;
|
|
irpSp->Parameters.DeviceIoControl.OutputBufferLength = sizeof(HID_DEVICE_ATTRIBUTES);
|
|
|
|
status = HidpCallDriverSynchronous(fdoExtension->fdo, irp);
|
|
DBGASSERT((status == STATUS_SUCCESS),
|
|
("STATUS_SUCCESS not returned, %x returned",status),
|
|
TRUE)
|
|
|
|
if (NT_SUCCESS (status)) {
|
|
|
|
/*
|
|
* We've got a hid descriptor, now we need to read the report descriptor.
|
|
*
|
|
* Find the descriptor describing the report.
|
|
*/
|
|
rawReportDescriptorLength = 0;
|
|
|
|
/*
|
|
* We currently don't support Physical descriptors, and have never
|
|
* seen a device that implements them, so we only get the report descriptor
|
|
* which MUST be the first descriptor. If physical descriptors are
|
|
* to be supported, must realloc the hidDescriptor to hold the data
|
|
* for the other descriptors and iterate over the descritpors.
|
|
*/
|
|
if (hidDescriptor->DescriptorList[0].bReportType == HID_REPORT_DESCRIPTOR_TYPE){
|
|
rawReportDescriptorLength = (ULONG)hidDescriptor->DescriptorList[0].wReportLength;
|
|
status = GetHIDRawReportDescriptor(fdoExtension, irp, rawReportDescriptorLength);
|
|
}
|
|
else {
|
|
status = STATUS_DEVICE_DATA_ERROR;
|
|
}
|
|
|
|
}
|
|
else {
|
|
status = STATUS_DEVICE_DATA_ERROR;
|
|
}
|
|
}
|
|
else {
|
|
status = STATUS_DEVICE_DATA_ERROR;
|
|
}
|
|
}
|
|
else {
|
|
status = STATUS_DEVICE_DATA_ERROR;
|
|
}
|
|
|
|
IoFreeIrp(irp);
|
|
}
|
|
else {
|
|
status = STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
DBGSUCCESS(status, FALSE)
|
|
return status;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpCreateSymbolicLink
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
NTSTATUS HidpCreateSymbolicLink(
|
|
IN PDO_EXTENSION *pdoExt,
|
|
IN ULONG collectionNum,
|
|
IN BOOLEAN Create,
|
|
IN PDEVICE_OBJECT Pdo
|
|
)
|
|
{
|
|
NTSTATUS status;
|
|
PHIDCLASS_COLLECTION classCollection;
|
|
|
|
PAGED_CODE();
|
|
|
|
classCollection = GetHidclassCollection(&pdoExt->deviceFdoExt->fdoExt, collectionNum);
|
|
if (classCollection){
|
|
//
|
|
// We've got a collection. Figure out what it is and create a symbolic
|
|
// link for it. For now we assign the "input" guid to all hid devices.
|
|
// The reference string is simply the collection number, zero-padded
|
|
// to eight digits.
|
|
//
|
|
if (Create){
|
|
|
|
/*
|
|
* Mark the PDO as initialized
|
|
*/
|
|
Pdo->Flags |= DO_DIRECT_IO;
|
|
Pdo->Flags &= ~DO_DEVICE_INITIALIZING;
|
|
|
|
/*
|
|
* Create the symbolic link
|
|
*/
|
|
status = IoRegisterDeviceInterface(
|
|
Pdo,
|
|
(LPGUID)&GUID_CLASS_INPUT,
|
|
NULL,
|
|
&classCollection->SymbolicLinkName );
|
|
if (NT_SUCCESS(status)){
|
|
|
|
/*
|
|
* Now set the symbolic link for the association and store it..
|
|
*/
|
|
ASSERT(ISPTR(pdoExt->name));
|
|
|
|
status = IoSetDeviceInterfaceState(&classCollection->SymbolicLinkName, TRUE);
|
|
}
|
|
}
|
|
else {
|
|
|
|
/*
|
|
* Disable the symbolic link
|
|
*/
|
|
if (ISPTR(classCollection->SymbolicLinkName.Buffer)){
|
|
status = IoSetDeviceInterfaceState(&classCollection->SymbolicLinkName, FALSE);
|
|
ExFreePool( classCollection->SymbolicLinkName.Buffer );
|
|
classCollection->SymbolicLinkName.Buffer = BAD_POINTER;
|
|
}
|
|
else {
|
|
status = STATUS_SUCCESS;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
status = STATUS_DEVICE_CONFIGURATION_ERROR;
|
|
}
|
|
|
|
DBGSUCCESS(status, TRUE)
|
|
return status;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* EnqueueInterruptReport
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
VOID EnqueueInterruptReport(PHIDCLASS_FILE_EXTENSION fileExtension,
|
|
PHIDCLASS_REPORT report)
|
|
{
|
|
PHIDCLASS_REPORT reportToDrop = NULL;
|
|
|
|
RUNNING_DISPATCH();
|
|
|
|
/*
|
|
* If the queue is full, drop the oldest report.
|
|
*/
|
|
if (fileExtension->CurrentInputReportQueueSize >= fileExtension->MaximumInputReportQueueSize){
|
|
PLIST_ENTRY listEntry;
|
|
|
|
#if DBG
|
|
if (fileExtension->dbgNumReportsDroppedSinceLastRead++ == 0){
|
|
DBGWARN(("HIDCLASS dropping input reports because report queue (size %xh) is full ...", fileExtension->MaximumInputReportQueueSize))
|
|
DBGASSERT((fileExtension->CurrentInputReportQueueSize == fileExtension->MaximumInputReportQueueSize),
|
|
("Current report queue size (%xh) is greater than maximum (%xh)",
|
|
fileExtension->CurrentInputReportQueueSize,
|
|
fileExtension->MaximumInputReportQueueSize),
|
|
FALSE);
|
|
}
|
|
#endif
|
|
|
|
ASSERT(!IsListEmpty(&fileExtension->ReportList));
|
|
|
|
listEntry = RemoveHeadList(&fileExtension->ReportList);
|
|
reportToDrop = CONTAINING_RECORD(listEntry, HIDCLASS_REPORT, ListEntry);
|
|
fileExtension->CurrentInputReportQueueSize--;
|
|
}
|
|
|
|
/*
|
|
* Now queue the current report
|
|
*/
|
|
InsertTailList(&fileExtension->ReportList, &report->ListEntry);
|
|
fileExtension->CurrentInputReportQueueSize++;
|
|
|
|
/*
|
|
* We don't have to be running < DPC_LEVEL to release reports since they
|
|
* are allocated using NonPagePool.
|
|
*/
|
|
if (reportToDrop){
|
|
ExFreePool(reportToDrop);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* DequeueInterruptReport
|
|
********************************************************************************
|
|
*
|
|
* Return the next interrupt report in the queue.
|
|
* If maxLen is not -1, then only return the report if it is <= maxlen.
|
|
*/
|
|
PHIDCLASS_REPORT DequeueInterruptReport(PHIDCLASS_FILE_EXTENSION fileExtension,
|
|
LONG maxLen)
|
|
{
|
|
PHIDCLASS_REPORT report;
|
|
|
|
RUNNING_DISPATCH();
|
|
|
|
if (IsListEmpty(&fileExtension->ReportList)){
|
|
report = NULL;
|
|
}
|
|
else {
|
|
PLIST_ENTRY listEntry = RemoveHeadList(&fileExtension->ReportList);
|
|
report = CONTAINING_RECORD(listEntry, HIDCLASS_REPORT, ListEntry);
|
|
|
|
if ((maxLen > 0) && (report->reportLength > (ULONG)maxLen)){
|
|
/*
|
|
* This report is too big for the caller.
|
|
* So put the report back in the queue and return NULL.
|
|
*/
|
|
InsertHeadList(&fileExtension->ReportList, &report->ListEntry);
|
|
report = NULL;
|
|
}
|
|
else {
|
|
InitializeListHead(&report->ListEntry);
|
|
ASSERT(fileExtension->CurrentInputReportQueueSize > 0);
|
|
fileExtension->CurrentInputReportQueueSize--;
|
|
|
|
#if DBG
|
|
if (fileExtension->dbgNumReportsDroppedSinceLastRead > 0){
|
|
DBGWARN(("... successful read(/flush) after %d reports were dropped.", fileExtension->dbgNumReportsDroppedSinceLastRead));
|
|
fileExtension->dbgNumReportsDroppedSinceLastRead = 0;
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return report;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpDestroyFileExtension
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
VOID HidpDestroyFileExtension(PHIDCLASS_COLLECTION collection, PHIDCLASS_FILE_EXTENSION FileExtension)
|
|
{
|
|
PFILE_OBJECT fileObject;
|
|
|
|
//
|
|
// Flush all of the pending reports on the file extension
|
|
//
|
|
HidpFlushReportQueue(FileExtension);
|
|
|
|
/*
|
|
* Fail all the pending reads
|
|
* (it would be nice if apps always cancelled all their reads
|
|
* before closing the device, but this is not always the case).
|
|
*/
|
|
CompleteAllPendingReadsForFileExtension(collection, FileExtension);
|
|
|
|
|
|
//
|
|
// Indicate in the file object that this file extension has gone away.
|
|
//
|
|
|
|
fileObject = FileExtension->FileObject;
|
|
#if DBG
|
|
fileObject->FsContext = NULL;
|
|
#endif
|
|
|
|
//
|
|
// Free our extension
|
|
//
|
|
#if DBG
|
|
FileExtension->Signature = ~HIDCLASS_FILE_EXTENSION_SIG;
|
|
#endif
|
|
ExFreePool( FileExtension );
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpFlushReportQueue
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
VOID HidpFlushReportQueue(IN PHIDCLASS_FILE_EXTENSION fileExtension)
|
|
{
|
|
PHIDCLASS_REPORT report;
|
|
KIRQL oldIrql;
|
|
|
|
LockFileExtension(fileExtension, &oldIrql);
|
|
while (report = DequeueInterruptReport(fileExtension, -1)){
|
|
//
|
|
// Ok to call this at DISPATCH_LEVEL, since report is NonPagedPool
|
|
//
|
|
ExFreePool(report);
|
|
}
|
|
UnlockFileExtension(fileExtension, oldIrql);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpGetCollectionInformation
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
NTSTATUS HidpGetCollectionInformation(
|
|
IN FDO_EXTENSION *fdoExtension,
|
|
IN ULONG collectionNumber,
|
|
IN PVOID Buffer,
|
|
IN OUT PULONG BufferSize
|
|
)
|
|
{
|
|
HID_COLLECTION_INFORMATION hidCollectionInfo;
|
|
PHIDP_COLLECTION_DESC hidCollectionDesc;
|
|
ULONG bytesToCopy;
|
|
NTSTATUS status;
|
|
|
|
|
|
/*
|
|
* Get a pointer to the appropriate collection descriptor.
|
|
*/
|
|
hidCollectionDesc = GetCollectionDesc(fdoExtension, collectionNumber);
|
|
if (hidCollectionDesc){
|
|
//
|
|
// Fill in hidCollectionInfo
|
|
//
|
|
hidCollectionInfo.DescriptorSize = hidCollectionDesc->PreparsedDataLength;
|
|
|
|
hidCollectionInfo.Polled = fdoExtension->driverExt->DevicesArePolled;
|
|
|
|
hidCollectionInfo.VendorID = fdoExtension->hidDeviceAttributes.VendorID;
|
|
hidCollectionInfo.ProductID = fdoExtension->hidDeviceAttributes.ProductID;
|
|
hidCollectionInfo.VersionNumber = fdoExtension->hidDeviceAttributes.VersionNumber;
|
|
|
|
//
|
|
// Copy as much of hidCollectionInfo as will fit in the output buffer.
|
|
//
|
|
if (*BufferSize < sizeof( HID_COLLECTION_INFORMATION)){
|
|
/*
|
|
* The user's buffer is not big enough.
|
|
* We'll return the size that the buffer needs to be.
|
|
* Must return this with a real error code (not a warning)
|
|
* so that IO post-processing does not copy into (and past)
|
|
* the user's buffer.
|
|
*/
|
|
bytesToCopy = *BufferSize;
|
|
status = STATUS_INVALID_BUFFER_SIZE;
|
|
}
|
|
else {
|
|
bytesToCopy = sizeof( HID_COLLECTION_INFORMATION );
|
|
status = STATUS_SUCCESS;
|
|
}
|
|
|
|
RtlCopyMemory(Buffer, &hidCollectionInfo, bytesToCopy);
|
|
*BufferSize = sizeof (HID_COLLECTION_INFORMATION);
|
|
}
|
|
else {
|
|
status = STATUS_DATA_ERROR;
|
|
}
|
|
|
|
DBGSUCCESS(status, FALSE)
|
|
return status;
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpGetCollectionDescriptor
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
NTSTATUS HidpGetCollectionDescriptor( IN FDO_EXTENSION *fdoExtension,
|
|
IN ULONG collectionId,
|
|
IN PVOID Buffer,
|
|
IN OUT PULONG BufferSize)
|
|
{
|
|
PHIDP_COLLECTION_DESC hidCollectionDesc;
|
|
ULONG bytesToCopy;
|
|
NTSTATUS status;
|
|
|
|
hidCollectionDesc = GetCollectionDesc(fdoExtension, collectionId);
|
|
if (hidCollectionDesc){
|
|
|
|
/*
|
|
* Copy as much of the preparsed data as will fit in the output buffer.
|
|
*/
|
|
if (*BufferSize < hidCollectionDesc->PreparsedDataLength){
|
|
/*
|
|
* The user's buffer is not big enough for all the
|
|
* preparsed data.
|
|
* We'll return the size that the buffer needs to be.
|
|
* Must return this with a real error code (not a warning)
|
|
* so that IO post-processing does not copy into (and past)
|
|
* the user's buffer.
|
|
*/
|
|
bytesToCopy = *BufferSize;
|
|
status = STATUS_INVALID_BUFFER_SIZE;
|
|
}
|
|
else {
|
|
bytesToCopy = hidCollectionDesc->PreparsedDataLength;
|
|
status = STATUS_SUCCESS;
|
|
}
|
|
|
|
RtlCopyMemory(Buffer, hidCollectionDesc->PreparsedData, bytesToCopy);
|
|
*BufferSize = hidCollectionDesc->PreparsedDataLength;
|
|
}
|
|
else {
|
|
status = STATUS_DATA_ERROR;
|
|
}
|
|
|
|
DBGSUCCESS(status, FALSE)
|
|
return status;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* GetReportIdentifier
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
PHIDP_REPORT_IDS GetReportIdentifier(FDO_EXTENSION *fdoExtension, ULONG reportId)
|
|
{
|
|
PHIDP_REPORT_IDS result = NULL;
|
|
PHIDP_DEVICE_DESC deviceDesc = &fdoExtension->deviceDesc;
|
|
ULONG i;
|
|
|
|
if (deviceDesc->ReportIDs){
|
|
for (i = 0; i < deviceDesc->ReportIDsLength; i++){
|
|
if (deviceDesc->ReportIDs[i].ReportID == reportId){
|
|
result = &deviceDesc->ReportIDs[i];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
DBGASSERT(result, ("Bogus report identifier requested %d", reportId), FALSE)
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* GetCollectionDesc
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
PHIDP_COLLECTION_DESC GetCollectionDesc(FDO_EXTENSION *fdoExtension, ULONG collectionId)
|
|
{
|
|
PHIDP_COLLECTION_DESC result = NULL;
|
|
PHIDP_DEVICE_DESC deviceDesc = &fdoExtension->deviceDesc;
|
|
ULONG i;
|
|
|
|
if (deviceDesc->CollectionDesc){
|
|
for (i = 0; i < deviceDesc->CollectionDescLength; i++){
|
|
if (deviceDesc->CollectionDesc[i].CollectionNumber == collectionId){
|
|
result = &deviceDesc->CollectionDesc[i];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
ASSERT(result);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
********************************************************************************
|
|
* GetHidclassCollection
|
|
********************************************************************************
|
|
*
|
|
*/
|
|
PHIDCLASS_COLLECTION GetHidclassCollection(FDO_EXTENSION *fdoExtension, ULONG collectionId)
|
|
{
|
|
PHIDCLASS_COLLECTION result = NULL;
|
|
PHIDP_DEVICE_DESC deviceDesc = &fdoExtension->deviceDesc;
|
|
ULONG i;
|
|
|
|
if (ISPTR(fdoExtension->classCollectionArray)){
|
|
for (i = 0; i < deviceDesc->CollectionDescLength; i++){
|
|
if (fdoExtension->classCollectionArray[i].CollectionNumber == collectionId){
|
|
result = &fdoExtension->classCollectionArray[i];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* MakeClientPDOName
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
PUNICODE_STRING MakeClientPDOName(PUNICODE_STRING fdoName, ULONG collectionId)
|
|
{
|
|
PUNICODE_STRING uPdoName;
|
|
|
|
PAGED_CODE();
|
|
|
|
uPdoName = (PUNICODE_STRING)ALLOCATEPOOL(NonPagedPool, sizeof(UNICODE_STRING));
|
|
if (uPdoName){
|
|
PWSTR wPdoName;
|
|
|
|
wPdoName = (PWSTR)ALLOCATEPOOL(
|
|
PagedPool,
|
|
fdoName->Length+sizeof(L"#COLLECTION0000000x"));
|
|
if (wPdoName){
|
|
StringCchPrintfW(wPdoName,
|
|
fdoName->Length+sizeof(L"#COLLECTION0000000x"),
|
|
L"%s#COLLECTION%08x",
|
|
fdoName->Buffer,
|
|
collectionId);
|
|
RtlInitUnicodeString(uPdoName, wPdoName);
|
|
}
|
|
else {
|
|
ExFreePool(uPdoName);
|
|
uPdoName = NULL;
|
|
}
|
|
}
|
|
|
|
return uPdoName;
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpCreateClientPDOs
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
NTSTATUS HidpCreateClientPDOs(PHIDCLASS_DEVICE_EXTENSION hidClassExtension)
|
|
{
|
|
NTSTATUS ntStatus = STATUS_SUCCESS;
|
|
PHIDCLASS_DRIVER_EXTENSION hidDriverExtension;
|
|
FDO_EXTENSION *fdoExt;
|
|
|
|
PAGED_CODE();
|
|
|
|
ASSERT(!hidClassExtension->isClientPdo);
|
|
|
|
fdoExt = &hidClassExtension->fdoExt;
|
|
|
|
hidDriverExtension = RefDriverExt(fdoExt->driverExt->MinidriverObject);
|
|
if (hidDriverExtension){
|
|
|
|
/*
|
|
* We will create one PDO for each collection on this device.
|
|
*/
|
|
ULONG numPDOs = fdoExt->deviceDesc.CollectionDescLength;
|
|
|
|
if (numPDOs){
|
|
|
|
if (!ISPTR(fdoExt->deviceRelations)) {
|
|
fdoExt->deviceRelations = (PDEVICE_RELATIONS)
|
|
ALLOCATEPOOL(NonPagedPool, sizeof(DEVICE_RELATIONS) + (numPDOs*sizeof(PDEVICE_OBJECT)));
|
|
}
|
|
|
|
if (fdoExt->deviceRelations){
|
|
|
|
if (!ISPTR(fdoExt->collectionPdoExtensions)) {
|
|
fdoExt->collectionPdoExtensions =
|
|
ALLOCATEPOOL(NonPagedPool, numPDOs*sizeof(PHIDCLASS_DEVICE_EXTENSION));
|
|
|
|
}
|
|
|
|
if (fdoExt->collectionPdoExtensions){
|
|
|
|
ULONG i;
|
|
|
|
fdoExt->deviceRelations->Count = numPDOs;
|
|
|
|
for (i = 0; i < numPDOs; i++){
|
|
PUNICODE_STRING uPdoName;
|
|
ULONG totalExtensionSize;
|
|
ULONG collectionNum = fdoExt->deviceDesc.CollectionDesc[i].CollectionNumber;
|
|
PDEVICE_OBJECT newClientPdo;
|
|
|
|
/*
|
|
* Construct a name for the PDO we're about to create.
|
|
*/
|
|
uPdoName = MakeClientPDOName(&fdoExt->name, collectionNum);
|
|
if (uPdoName){
|
|
/*
|
|
* We use the same device extension for the client PDOs as for our FDO.
|
|
*/
|
|
totalExtensionSize = sizeof(HIDCLASS_DEVICE_EXTENSION) +
|
|
hidDriverExtension->DeviceExtensionSize;
|
|
|
|
/*
|
|
* Create a PDO to represent this collection.
|
|
* Since hidclass is not a real driver, it does not have a driver object;
|
|
* so just use the minidriver's driver object.
|
|
*
|
|
* NOTE - newClientPdo->NextDevice will point to this minidriver's NextDevice
|
|
*/
|
|
ntStatus = IoCreateDevice( hidDriverExtension->MinidriverObject, // driver object
|
|
totalExtensionSize, // extension size
|
|
NULL, // name of the PDO
|
|
FILE_DEVICE_UNKNOWN, // Device type
|
|
FILE_AUTOGENERATED_DEVICE_NAME, // DeviceCharacteristics
|
|
FALSE, // not exclusive
|
|
&newClientPdo);
|
|
if (NT_SUCCESS(ntStatus)){
|
|
PHIDCLASS_DEVICE_EXTENSION clientPdoExtension = newClientPdo->DeviceExtension;
|
|
USHORT usagePage = fdoExt->deviceDesc.CollectionDesc[i].UsagePage;
|
|
USHORT usage = fdoExt->deviceDesc.CollectionDesc[i].Usage;
|
|
|
|
DBG_RECORD_DEVOBJ(newClientPdo, "cltn PDO")
|
|
|
|
ObReferenceObject(newClientPdo);
|
|
|
|
/*
|
|
* We may pass Irps from the upper stack to the lower stack,
|
|
* so make sure there are enough stack locations for the IRPs
|
|
* we pass down.
|
|
*/
|
|
newClientPdo->StackSize = fdoExt->fdo->StackSize+1;
|
|
|
|
|
|
/*
|
|
* Initialize the PDO's extension
|
|
*/
|
|
RtlZeroMemory(clientPdoExtension, totalExtensionSize);
|
|
|
|
clientPdoExtension->hidExt = hidClassExtension->hidExt;
|
|
clientPdoExtension->isClientPdo = TRUE;
|
|
clientPdoExtension->Signature = HID_DEVICE_EXTENSION_SIG;
|
|
|
|
clientPdoExtension->pdoExt.collectionNum = collectionNum;
|
|
clientPdoExtension->pdoExt.collectionIndex = i;
|
|
clientPdoExtension->pdoExt.pdo = newClientPdo;
|
|
clientPdoExtension->pdoExt.state = COLLECTION_STATE_UNINITIALIZED;
|
|
clientPdoExtension->pdoExt.deviceFdoExt = hidClassExtension;
|
|
clientPdoExtension->pdoExt.StatusChangeFn = BAD_POINTER;
|
|
|
|
clientPdoExtension->pdoExt.name = uPdoName;
|
|
|
|
clientPdoExtension->pdoExt.devicePowerState = PowerDeviceD0;
|
|
clientPdoExtension->pdoExt.systemPowerState = fdoExt->systemPowerState;
|
|
clientPdoExtension->pdoExt.MouseOrKeyboard =
|
|
((usagePage == HID_USAGE_PAGE_GENERIC) &&
|
|
((usage == HID_USAGE_GENERIC_POINTER) ||
|
|
(usage == HID_USAGE_GENERIC_MOUSE) ||
|
|
(usage == HID_USAGE_GENERIC_KEYBOARD) ||
|
|
(usage == HID_USAGE_GENERIC_KEYPAD)));
|
|
|
|
IoInitializeRemoveLock (&clientPdoExtension->pdoExt.removeLock, HIDCLASS_POOL_TAG, 0, 10);
|
|
KeInitializeSpinLock (&clientPdoExtension->pdoExt.remoteWakeSpinLock);
|
|
clientPdoExtension->pdoExt.remoteWakeIrp = NULL;
|
|
|
|
/*
|
|
* Store a pointer to the new PDO in the FDO extension's deviceRelations array.
|
|
*/
|
|
fdoExt->deviceRelations->Objects[i] = newClientPdo;
|
|
|
|
/*
|
|
* Store a pointer to the PDO's extension.
|
|
*/
|
|
fdoExt->collectionPdoExtensions[i] = clientPdoExtension;
|
|
|
|
newClientPdo->Flags |= DO_POWER_PAGABLE;
|
|
newClientPdo->Flags &= ~DO_DEVICE_INITIALIZING;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
ntStatus = STATUS_NO_MEMORY;
|
|
}
|
|
}
|
|
|
|
if (!NT_SUCCESS(ntStatus)){
|
|
ExFreePool(fdoExt->collectionPdoExtensions);
|
|
fdoExt->collectionPdoExtensions = BAD_POINTER;
|
|
}
|
|
}
|
|
else {
|
|
ntStatus = STATUS_NO_MEMORY;
|
|
}
|
|
|
|
if (!NT_SUCCESS(ntStatus)){
|
|
ExFreePool(fdoExt->deviceRelations);
|
|
fdoExt->deviceRelations = BAD_POINTER;
|
|
}
|
|
}
|
|
else {
|
|
ntStatus = STATUS_NO_MEMORY;
|
|
}
|
|
}
|
|
else {
|
|
ASSERT(numPDOs);
|
|
ntStatus = STATUS_DEVICE_CONFIGURATION_ERROR;
|
|
}
|
|
DerefDriverExt(fdoExt->driverExt->MinidriverObject);
|
|
}
|
|
else {
|
|
ASSERT(hidDriverExtension);
|
|
ntStatus = STATUS_DEVICE_CONFIGURATION_ERROR;
|
|
}
|
|
|
|
DBGSUCCESS(ntStatus, TRUE)
|
|
return ntStatus;
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* MemDup
|
|
********************************************************************************
|
|
*
|
|
* Return a fresh copy of the argument.
|
|
*
|
|
*/
|
|
PVOID MemDup(POOL_TYPE PoolType, PVOID dataPtr, ULONG length)
|
|
{
|
|
PVOID newPtr;
|
|
|
|
newPtr = (PVOID)ALLOCATEPOOL(PoolType, length);
|
|
if (newPtr){
|
|
RtlCopyMemory(newPtr, dataPtr, length);
|
|
}
|
|
|
|
ASSERT(newPtr);
|
|
return newPtr;
|
|
}
|
|
|
|
/*
|
|
********************************************************************************
|
|
* WStrLen
|
|
********************************************************************************
|
|
*
|
|
*/
|
|
ULONG WStrLen(PWCHAR str)
|
|
{
|
|
ULONG result = 0;
|
|
|
|
while (*str++ != UNICODE_NULL){
|
|
result++;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* WStrCpy
|
|
********************************************************************************
|
|
*
|
|
*/
|
|
ULONG WStrCpy(PWCHAR dest, PWCHAR src)
|
|
{
|
|
ULONG result = 0;
|
|
|
|
while (*dest++ = *src++){
|
|
result++;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
BOOLEAN WStrCompareN(PWCHAR str1, PWCHAR str2, ULONG maxChars)
|
|
{
|
|
while ((maxChars > 0) && *str1 && (*str1 == *str2)){
|
|
maxChars--;
|
|
str1++;
|
|
str2++;
|
|
}
|
|
|
|
return (BOOLEAN)((maxChars == 0) || (!*str1 && !*str2));
|
|
}
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpNumberToString
|
|
********************************************************************************
|
|
*
|
|
*/
|
|
void HidpNumberToString(PWCHAR String, USHORT Number, USHORT stringLen)
|
|
{
|
|
const static WCHAR map[] = L"0123456789ABCDEF";
|
|
LONG i = 0;
|
|
ULONG nibble = 0;
|
|
|
|
ASSERT(stringLen);
|
|
|
|
for (i = stringLen-1; i >= 0; i--) {
|
|
String[i] = map[Number & 0x0F];
|
|
Number >>= 4;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* CopyDeviceRelations
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
PDEVICE_RELATIONS CopyDeviceRelations(PDEVICE_RELATIONS deviceRelations)
|
|
{
|
|
PDEVICE_RELATIONS newDeviceRelations;
|
|
|
|
if (deviceRelations){
|
|
ULONG size = sizeof(DEVICE_RELATIONS) + (deviceRelations->Count*sizeof(PDEVICE_OBJECT));
|
|
newDeviceRelations = MemDup(PagedPool, deviceRelations, size);
|
|
}
|
|
else {
|
|
newDeviceRelations = NULL;
|
|
}
|
|
|
|
return newDeviceRelations;
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpQueryDeviceRelations
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
NTSTATUS HidpQueryDeviceRelations(IN PHIDCLASS_DEVICE_EXTENSION hidClassExtension, IN OUT PIRP Irp)
|
|
{
|
|
PIO_STACK_LOCATION ioStack;
|
|
NTSTATUS ntStatus = STATUS_SUCCESS;
|
|
KIRQL irql;
|
|
|
|
ASSERT(!hidClassExtension->isClientPdo);
|
|
|
|
ioStack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
if (ioStack->Parameters.QueryDeviceRelations.Type == BusRelations) {
|
|
|
|
if (ISPTR(hidClassExtension->fdoExt.deviceRelations)){
|
|
/*
|
|
* Don't call HidpCreateClientPDOs again if it's
|
|
* already been called for this device.
|
|
*/
|
|
ntStatus = STATUS_SUCCESS;
|
|
}
|
|
else {
|
|
|
|
ntStatus = HidpCreateClientPDOs(hidClassExtension);
|
|
}
|
|
|
|
if (NT_SUCCESS(ntStatus)){
|
|
ULONG i;
|
|
|
|
KeAcquireSpinLock(&hidClassExtension->fdoExt.presentSpinLock,
|
|
&irql);
|
|
|
|
/*
|
|
* NTKERN expects a new pointer each time it calls QUERY_DEVICE_RELATIONS;
|
|
* it then FREES THE POINTER.
|
|
* So we have to return a new pointer each time, whether or not we actually
|
|
* created our copy of the device relations for this call.
|
|
*/
|
|
|
|
if (!hidClassExtension->fdoExt.isPresent) {
|
|
|
|
hidClassExtension->fdoExt.presentReported = FALSE;
|
|
|
|
KeReleaseSpinLock(&hidClassExtension->fdoExt.presentSpinLock,
|
|
irql);
|
|
|
|
Irp->IoStatus.Information = (ULONG_PTR)ExAllocatePool(PagedPool, sizeof(DEVICE_RELATIONS));
|
|
|
|
if (Irp->IoStatus.Information) {
|
|
PHIDCLASS_DEVICE_EXTENSION clientPdoExtension;
|
|
|
|
if (ISPTR(hidClassExtension->fdoExt.deviceRelations)) {
|
|
ExFreePool(hidClassExtension->fdoExt.deviceRelations);
|
|
}
|
|
|
|
hidClassExtension->fdoExt.deviceRelations = BAD_POINTER;
|
|
|
|
((PDEVICE_RELATIONS) (Irp->IoStatus.Information))->Count = 0;
|
|
((PDEVICE_RELATIONS) (Irp->IoStatus.Information))->Objects[0] = NULL;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
hidClassExtension->fdoExt.presentReported = TRUE;
|
|
KeReleaseSpinLock(&hidClassExtension->fdoExt.presentSpinLock,
|
|
irql);
|
|
|
|
Irp->IoStatus.Information = (ULONG_PTR)CopyDeviceRelations(hidClassExtension->fdoExt.deviceRelations);
|
|
|
|
if (Irp->IoStatus.Information) {
|
|
|
|
/*
|
|
* PnP dereferences each device object
|
|
* in the device relations list after each call.
|
|
* So for each call, add an extra reference.
|
|
*/
|
|
for (i = 0; i < hidClassExtension->fdoExt.deviceRelations->Count; i++){
|
|
ObReferenceObject(hidClassExtension->fdoExt.deviceRelations->Objects[i]);
|
|
hidClassExtension->fdoExt.deviceRelations->Objects[i]->Flags &= ~DO_DEVICE_INITIALIZING;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
if (!Irp->IoStatus.Information){
|
|
ntStatus = STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
}
|
|
|
|
DBGSUCCESS(ntStatus, TRUE)
|
|
}
|
|
else {
|
|
/*
|
|
* We don't support this option, so just maintain
|
|
* the current status (do not return STATUS_NOT_SUPPORTED).
|
|
*/
|
|
ntStatus = Irp->IoStatus.Status;
|
|
}
|
|
|
|
return ntStatus;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpQueryCollectionCapabilities
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
NTSTATUS HidpQueryCollectionCapabilities( PDO_EXTENSION *pdoExt,
|
|
IN OUT PIRP Irp)
|
|
{
|
|
PDEVICE_CAPABILITIES deviceCapabilities;
|
|
PIO_STACK_LOCATION ioStack;
|
|
FDO_EXTENSION *fdoExt;
|
|
NTSTATUS status;
|
|
|
|
PAGED_CODE();
|
|
|
|
ASSERT(pdoExt->deviceFdoExt->Signature == HID_DEVICE_EXTENSION_SIG);
|
|
fdoExt = &pdoExt->deviceFdoExt->fdoExt;
|
|
ioStack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
deviceCapabilities = ioStack->Parameters.DeviceCapabilities.Capabilities;
|
|
if (deviceCapabilities){
|
|
|
|
/*
|
|
* Set all fields for the collection-PDO as for the device-FDO
|
|
* by default.
|
|
*/
|
|
*deviceCapabilities = fdoExt->deviceCapabilities;
|
|
|
|
/*
|
|
* Now override the fields we care about.
|
|
*/
|
|
deviceCapabilities->LockSupported = FALSE;
|
|
deviceCapabilities->EjectSupported = FALSE;
|
|
deviceCapabilities->Removable = FALSE;
|
|
deviceCapabilities->DockDevice = FALSE;
|
|
deviceCapabilities->UniqueID = FALSE;
|
|
deviceCapabilities->SilentInstall = TRUE;
|
|
|
|
/*
|
|
* This field is very important;
|
|
* it causes HIDCLASS to get the START_DEVICE IRP immediately,
|
|
* if the device is not a keyboard or mouse.
|
|
*/
|
|
deviceCapabilities->RawDeviceOK = !pdoExt->MouseOrKeyboard;
|
|
|
|
/*
|
|
* This bit indicates that the device may be removed on NT
|
|
* without running the 'hot-unplug' utility.
|
|
*/
|
|
deviceCapabilities->SurpriseRemovalOK = TRUE;
|
|
|
|
DBGVERBOSE(("WAKE info: sysWake=%d devWake=%d; wake from D0=%d D1=%d D2=%d D3=%d.",
|
|
deviceCapabilities->SystemWake,
|
|
deviceCapabilities->DeviceWake,
|
|
(ULONG)deviceCapabilities->WakeFromD0,
|
|
(ULONG)deviceCapabilities->WakeFromD1,
|
|
(ULONG)deviceCapabilities->WakeFromD2,
|
|
(ULONG)deviceCapabilities->WakeFromD3))
|
|
|
|
status = STATUS_SUCCESS;
|
|
}
|
|
else {
|
|
status = STATUS_DEVICE_CONFIGURATION_ERROR;
|
|
}
|
|
|
|
Irp->IoStatus.Information = (ULONG_PTR)deviceCapabilities;
|
|
|
|
DBGSUCCESS(status, TRUE)
|
|
return status;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* BuildCompatibleID
|
|
********************************************************************************
|
|
*
|
|
* Return a multi-string consisting of compatibility id's for this device
|
|
* in increasingly generic order (ending with HID_GENERIC_DEVICE).
|
|
*
|
|
* author: kenray
|
|
*
|
|
*/
|
|
PWSTR BuildCompatibleID(PHIDCLASS_DEVICE_EXTENSION hidClassExtension)
|
|
{
|
|
USHORT usage, usagePage;
|
|
ULONG spLength;
|
|
ULONG totLength;
|
|
ULONG i;
|
|
PWSTR specificId = NULL;
|
|
PWSTR compatIdList;
|
|
PWSTR genericId;
|
|
FDO_EXTENSION *fdoExt;
|
|
|
|
PAGED_CODE();
|
|
|
|
ASSERT(hidClassExtension->isClientPdo);
|
|
fdoExt = &hidClassExtension->pdoExt.deviceFdoExt->fdoExt;
|
|
|
|
ASSERT(ISPTR(fdoExt->deviceDesc.CollectionDesc));
|
|
|
|
i = hidClassExtension->pdoExt.collectionIndex;
|
|
usagePage = fdoExt->deviceDesc.CollectionDesc[i].UsagePage;
|
|
usage = fdoExt->deviceDesc.CollectionDesc[i].Usage;
|
|
|
|
|
|
switch (usagePage) {
|
|
case HID_USAGE_PAGE_GENERIC:
|
|
switch (usage) {
|
|
case HID_USAGE_GENERIC_POINTER:
|
|
case HID_USAGE_GENERIC_MOUSE:
|
|
specificId = HIDCLASS_SYSTEM_MOUSE;
|
|
break;
|
|
case HID_USAGE_GENERIC_KEYBOARD:
|
|
case HID_USAGE_GENERIC_KEYPAD:
|
|
specificId = HIDCLASS_SYSTEM_KEYBOARD;
|
|
break;
|
|
case HID_USAGE_GENERIC_JOYSTICK:
|
|
case HID_USAGE_GENERIC_GAMEPAD:
|
|
specificId = HIDCLASS_SYSTEM_GAMING_DEVICE;
|
|
break;
|
|
case HID_USAGE_GENERIC_SYSTEM_CTL:
|
|
specificId = HIDCLASS_SYSTEM_CONTROL;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case HID_USAGE_PAGE_CONSUMER:
|
|
specificId = HIDCLASS_SYSTEM_CONSUMER_DEVICE;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
spLength = (specificId) ? (WStrLen(specificId)+1) : 0;
|
|
|
|
totLength = spLength +
|
|
HIDCLASS_COMPATIBLE_ID_GENERIC_LENGTH +
|
|
HIDCLASS_COMPATIBLE_ID_STANDARD_LENGTH +
|
|
1;
|
|
|
|
compatIdList = ALLOCATEPOOL(NonPagedPool, totLength * sizeof(WCHAR));
|
|
if (compatIdList) {
|
|
|
|
RtlZeroMemory (compatIdList, totLength * sizeof(WCHAR));
|
|
if (specificId) {
|
|
RtlCopyMemory (compatIdList, specificId, spLength * sizeof (WCHAR));
|
|
}
|
|
|
|
genericId = compatIdList + spLength;
|
|
totLength = HIDCLASS_COMPATIBLE_ID_GENERIC_LENGTH;
|
|
RtlCopyMemory (genericId,
|
|
HIDCLASS_COMPATIBLE_ID_GENERIC_NAME,
|
|
totLength*sizeof(WCHAR));
|
|
|
|
HidpNumberToString (genericId + HIDCLASS_COMPATIBLE_ID_PAGE_OFFSET,
|
|
usagePage,
|
|
4);
|
|
|
|
HidpNumberToString (genericId + HIDCLASS_COMPATIBLE_ID_USAGE_OFFSET,
|
|
usage,
|
|
4);
|
|
|
|
RtlCopyMemory (genericId + totLength,
|
|
HIDCLASS_COMPATIBLE_ID_STANDARD_NAME,
|
|
HIDCLASS_COMPATIBLE_ID_STANDARD_LENGTH * sizeof (WCHAR));
|
|
}
|
|
|
|
return compatIdList;
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* SubstituteBusNames
|
|
********************************************************************************
|
|
*
|
|
* oldIDs is a multi-String of hardware IDs.
|
|
*
|
|
* 1. Return a new string with each "<busName>\" prefix replaced by "HID\".
|
|
*
|
|
* 2. If the device has multiple collections, append "&Colxx" to each id.
|
|
*
|
|
*/
|
|
PWCHAR SubstituteBusNames(PWCHAR oldIDs, FDO_EXTENSION *fdoExt, PDO_EXTENSION *pdoExt)
|
|
{
|
|
ULONG newIdLen;
|
|
PWCHAR id, newIDs;
|
|
ULONG numCollections;
|
|
WCHAR colNumStr[] = L"&Colxx";
|
|
|
|
PAGED_CODE();
|
|
|
|
numCollections = fdoExt->deviceDesc.CollectionDescLength;
|
|
ASSERT(numCollections > 0);
|
|
|
|
for (id = oldIDs, newIdLen = 0; *id; ){
|
|
ULONG thisIdLen = WStrLen(id);
|
|
|
|
/*
|
|
* This is a little sloppy because we're actually going to chop
|
|
* off the other bus name; but better this than walking each string.
|
|
*/
|
|
newIdLen += thisIdLen + 1 + sizeof("HID\\");
|
|
|
|
if (numCollections > 1){
|
|
newIdLen += sizeof(colNumStr)/sizeof(WCHAR);
|
|
}
|
|
|
|
id += thisIdLen + 1;
|
|
}
|
|
|
|
/*
|
|
* Add one for the extra NULL at the end of the multi-string.
|
|
*/
|
|
newIdLen++;
|
|
|
|
newIDs = ALLOCATEPOOL(NonPagedPool, newIdLen*sizeof(WCHAR));
|
|
if (newIDs){
|
|
ULONG oldIdOff, newIdOff;
|
|
|
|
/*
|
|
* Copy each string in the multi-string, replacing the bus name.
|
|
*/
|
|
for (oldIdOff = newIdOff = 0; oldIDs[oldIdOff]; ){
|
|
ULONG thisIdLen = WStrLen(oldIDs+oldIdOff);
|
|
ULONG devIdOff;
|
|
|
|
/*
|
|
* Copy the new bus name to the new string.
|
|
*/
|
|
newIdOff += WStrCpy(newIDs+newIdOff, L"HID\\");
|
|
|
|
/*
|
|
* Go past the old bus name in the old string.
|
|
*/
|
|
for (devIdOff = 0; oldIDs[oldIdOff+devIdOff]; devIdOff++){
|
|
if (oldIDs[oldIdOff+devIdOff] == L'\\'){
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Copy the rest of this device id.
|
|
*/
|
|
if (oldIDs[oldIdOff+devIdOff] == L'\\'){
|
|
devIdOff++;
|
|
}
|
|
else {
|
|
/*
|
|
* Strange -- no bus name in hardware id.
|
|
* Just copy the entire id.
|
|
*/
|
|
devIdOff = 0;
|
|
}
|
|
newIdOff += WStrCpy(newIDs+newIdOff, oldIDs+oldIdOff+devIdOff);
|
|
|
|
if (numCollections > 1){
|
|
/*
|
|
* If there is more than one collection,
|
|
* then also append the collection number.
|
|
*/
|
|
HidpNumberToString(colNumStr+4, (USHORT)pdoExt->collectionNum, 2);
|
|
newIdOff += WStrCpy(newIDs+newIdOff, colNumStr);
|
|
}
|
|
|
|
/*
|
|
* Go past the single string terminator.
|
|
*/
|
|
newIdOff++;
|
|
|
|
oldIdOff += thisIdLen + 1;
|
|
}
|
|
|
|
/*
|
|
* Add extra NULL to terminate multi-string.
|
|
*/
|
|
newIDs[newIdOff] = UNICODE_NULL;
|
|
}
|
|
|
|
return newIDs;
|
|
}
|
|
|
|
NTSTATUS
|
|
HidpQueryInterface(
|
|
IN PHIDCLASS_DEVICE_EXTENSION hidClassExtension,
|
|
IN OUT PIRP Irp
|
|
)
|
|
{
|
|
PIO_STACK_LOCATION irpSp;
|
|
|
|
PAGED_CODE();
|
|
|
|
ASSERT(hidClassExtension->isClientPdo);
|
|
irpSp = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
if (RtlEqualMemory(irpSp->Parameters.QueryInterface.InterfaceType,
|
|
&GUID_HID_INTERFACE_NOTIFY,
|
|
sizeof(GUID))) {
|
|
PDO_EXTENSION *pdoExt;
|
|
PHID_INTERFACE_NOTIFY_PNP notify;
|
|
|
|
notify = (PHID_INTERFACE_NOTIFY_PNP) irpSp->Parameters.QueryInterface.Interface;
|
|
if (notify->Size != sizeof(HID_INTERFACE_NOTIFY_PNP) ||
|
|
notify->Version < 1 ||
|
|
notify->StatusChangeFn == NULL) {
|
|
//
|
|
// return STATUS_UNSUPPORTED probably
|
|
//
|
|
return Irp->IoStatus.Status;
|
|
}
|
|
|
|
pdoExt = &hidClassExtension->pdoExt;
|
|
|
|
pdoExt->StatusChangeFn = notify->StatusChangeFn;
|
|
pdoExt->StatusChangeContext = notify->CallbackContext;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
else if (RtlEqualMemory(irpSp->Parameters.QueryInterface.InterfaceType,
|
|
&GUID_HID_INTERFACE_HIDPARSE,
|
|
sizeof(GUID))) {
|
|
//
|
|
// Required for Generic Input, to remove the direct link
|
|
// b/w win32k and hidparse.
|
|
//
|
|
PHID_INTERFACE_HIDPARSE hidparse;
|
|
|
|
hidparse = (PHID_INTERFACE_HIDPARSE) irpSp->Parameters.QueryInterface.Interface;
|
|
if (hidparse->Size != sizeof(HID_INTERFACE_HIDPARSE) ||
|
|
hidparse->Version < 1) {
|
|
//
|
|
// return STATUS_UNSUPPORTED probably
|
|
//
|
|
return Irp->IoStatus.Status;
|
|
}
|
|
hidparse->HidpGetCaps = HidP_GetCaps;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
//
|
|
// return STATUS_UNSUPPORTED probably
|
|
//
|
|
return Irp->IoStatus.Status;
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpQueryIdForClientPdo
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
NTSTATUS HidpQueryIdForClientPdo (
|
|
IN PHIDCLASS_DEVICE_EXTENSION hidClassExtension,
|
|
IN OUT PIRP Irp
|
|
)
|
|
{
|
|
PIO_STACK_LOCATION irpSp;
|
|
NTSTATUS status;
|
|
PDO_EXTENSION *pdoExt;
|
|
FDO_EXTENSION *fdoExt;
|
|
|
|
PAGED_CODE();
|
|
|
|
ASSERT(hidClassExtension->isClientPdo);
|
|
pdoExt = &hidClassExtension->pdoExt;
|
|
fdoExt = &pdoExt->deviceFdoExt->fdoExt;
|
|
|
|
irpSp = IoGetCurrentIrpStackLocation( Irp );
|
|
|
|
switch (irpSp->Parameters.QueryId.IdType) {
|
|
|
|
case BusQueryHardwareIDs:
|
|
|
|
/*
|
|
* Call down to get a multi-string of hardware ids for the PDO.
|
|
*/
|
|
IoCopyCurrentIrpStackLocationToNext(Irp);
|
|
status = HidpCallDriverSynchronous(fdoExt->fdo, Irp);
|
|
if (NT_SUCCESS(status)){
|
|
PWCHAR oldIDs, newIDs;
|
|
/*
|
|
* Replace the bus names in the current hardware IDs list with "HID\".
|
|
*/
|
|
oldIDs = (PWCHAR)Irp->IoStatus.Information;
|
|
Irp->IoStatus.Information = (ULONG_PTR)BAD_POINTER;
|
|
newIDs = SubstituteBusNames(oldIDs, fdoExt, pdoExt);
|
|
ExFreePool(oldIDs);
|
|
|
|
if (newIDs){
|
|
|
|
/*
|
|
* Now append the compatible ids to the end of the HardwareIDs list.
|
|
*/
|
|
PWCHAR compatIDs = BuildCompatibleID(hidClassExtension);
|
|
if (compatIDs){
|
|
ULONG basicIDsLen, compatIDsLen;
|
|
PWCHAR allHwIDs;
|
|
|
|
/*
|
|
* Find the lengths of the id multi-strings (not counting the extra NULL at end).
|
|
*/
|
|
for (basicIDsLen = 0; newIDs[basicIDsLen]; basicIDsLen += WStrLen(newIDs+basicIDsLen)+1);
|
|
for (compatIDsLen = 0; compatIDs[compatIDsLen]; compatIDsLen += WStrLen(compatIDs+compatIDsLen)+1);
|
|
|
|
allHwIDs = ALLOCATEPOOL(PagedPool, (basicIDsLen+compatIDsLen+1)*sizeof(WCHAR));
|
|
if (allHwIDs){
|
|
RtlCopyMemory(allHwIDs, newIDs, basicIDsLen*sizeof(WCHAR));
|
|
RtlCopyMemory( allHwIDs+basicIDsLen,
|
|
compatIDs,
|
|
(compatIDsLen+1)*sizeof(WCHAR));
|
|
|
|
Irp->IoStatus.Information = (ULONG_PTR)allHwIDs;
|
|
}
|
|
else {
|
|
status = STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
ExFreePool(compatIDs);
|
|
}
|
|
else {
|
|
status = STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
ExFreePool(newIDs);
|
|
}
|
|
else {
|
|
status = STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
}
|
|
|
|
DBGSUCCESS(status, TRUE)
|
|
break;
|
|
|
|
case BusQueryDeviceID:
|
|
/*
|
|
* Call down to get a the device id for the device's PDO.
|
|
*/
|
|
IoCopyCurrentIrpStackLocationToNext(Irp);
|
|
status = HidpCallDriverSynchronous(fdoExt->fdo, Irp);
|
|
if (NT_SUCCESS(status)){
|
|
PWCHAR oldId, newId, tmpId;
|
|
|
|
/*
|
|
* Replace the bus name (e.g. "USB\") with "HID\" in the device name.
|
|
*/
|
|
|
|
/*
|
|
* First make this string into a multi-string.
|
|
*/
|
|
oldId = (PWCHAR)Irp->IoStatus.Information;
|
|
tmpId = ALLOCATEPOOL(PagedPool, (WStrLen(oldId)+2)*sizeof(WCHAR));
|
|
if (tmpId){
|
|
ULONG len = WStrCpy(tmpId, oldId);
|
|
|
|
/*
|
|
* Add the extra NULL to terminate the multi-string.
|
|
*/
|
|
tmpId[len+1] = UNICODE_NULL;
|
|
|
|
/*
|
|
* Change the bus name to "HID\"
|
|
*/
|
|
newId = SubstituteBusNames(tmpId, fdoExt, pdoExt);
|
|
if (newId){
|
|
Irp->IoStatus.Information = (ULONG_PTR)newId;
|
|
}
|
|
else {
|
|
status = STATUS_DEVICE_DATA_ERROR;
|
|
Irp->IoStatus.Information = (ULONG_PTR)BAD_POINTER;
|
|
}
|
|
|
|
ExFreePool(tmpId);
|
|
}
|
|
else {
|
|
status = STATUS_DEVICE_DATA_ERROR;
|
|
Irp->IoStatus.Information = (ULONG_PTR)BAD_POINTER;
|
|
}
|
|
ExFreePool(oldId);
|
|
}
|
|
|
|
DBGSUCCESS(status, TRUE)
|
|
break;
|
|
|
|
case BusQueryInstanceID:
|
|
|
|
/*
|
|
* Produce an instance-id for this collection-PDO.
|
|
*
|
|
* Note: NTKERN frees the returned pointer, so we must provide a fresh pointer.
|
|
*/
|
|
{
|
|
PWSTR instanceId = MemDup(PagedPool, L"0000", sizeof(L"0000"));
|
|
if (instanceId){
|
|
ULONG i;
|
|
|
|
/*
|
|
* Find this collection-PDO in the device-relations array
|
|
* and make the id be the PDO's index within that array.
|
|
*/
|
|
for (i = 0; i < fdoExt->deviceRelations->Count; i++){
|
|
if (fdoExt->deviceRelations->Objects[i] == pdoExt->pdo){
|
|
StringCbPrintfW(instanceId,
|
|
sizeof(L"0000"),
|
|
L"%04x", i);
|
|
break;
|
|
}
|
|
}
|
|
ASSERT(i < fdoExt->deviceRelations->Count);
|
|
|
|
Irp->IoStatus.Information = (ULONG_PTR)instanceId;
|
|
status = STATUS_SUCCESS;
|
|
}
|
|
else {
|
|
status = STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
}
|
|
|
|
DBGSUCCESS(status, TRUE)
|
|
break;
|
|
|
|
case BusQueryCompatibleIDs:
|
|
|
|
// we now return the compatible id's at the end of HardwareIDs
|
|
// so that there is no UI on plug-in for a compatible-id match
|
|
// for a class-PDO.
|
|
// Irp->IoStatus.Information = (ULONG)BuildCompatibleID(hidClassExtension);
|
|
Irp->IoStatus.Information = (ULONG_PTR)ALLOCATEPOOL(PagedPool, sizeof(L"\0"));
|
|
if (Irp->IoStatus.Information) {
|
|
*(ULONG *)Irp->IoStatus.Information = 0; // double unicode-NULL.
|
|
status = STATUS_SUCCESS;
|
|
} else {
|
|
status = STATUS_INSUFFICIENT_RESOURCES;
|
|
ASSERT(0);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* Do not return STATUS_NOT_SUPPORTED;
|
|
* keep the default status
|
|
* (this allows filter drivers to work).
|
|
*/
|
|
status = Irp->IoStatus.Status;
|
|
break;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* AllClientPDOsInitialized
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
BOOLEAN AllClientPDOsInitialized(FDO_EXTENSION *fdoExtension, BOOLEAN initialized)
|
|
{
|
|
BOOLEAN result = TRUE;
|
|
ULONG i;
|
|
|
|
if (ISPTR(fdoExtension->deviceRelations)){
|
|
for (i = 0; i < fdoExtension->deviceRelations->Count; i++){
|
|
PDEVICE_OBJECT pdo = fdoExtension->deviceRelations->Objects[i];
|
|
PHIDCLASS_DEVICE_EXTENSION pdoDevExt = pdo->DeviceExtension;
|
|
PDO_EXTENSION *pdoExt = &pdoDevExt->pdoExt;
|
|
|
|
/*
|
|
* Trick: compare !-results so that all TRUE values are equal
|
|
*/
|
|
if (!initialized == !(pdoExt->state == COLLECTION_STATE_UNINITIALIZED)){
|
|
DBGVERBOSE(("AllClientPDOsInitialized is returning FALSE for pdo %x, state = %d",
|
|
pdo, pdoExt->state))
|
|
result = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
result = !initialized;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* AnyClientPDOsInitialized
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*/
|
|
BOOLEAN AnyClientPDOsInitialized(FDO_EXTENSION *fdoExtension, BOOLEAN initialized)
|
|
{
|
|
BOOLEAN result = TRUE;
|
|
ULONG i;
|
|
|
|
if (ISPTR(fdoExtension->deviceRelations)){
|
|
for (i = 0; i < fdoExtension->deviceRelations->Count; i++){
|
|
PDEVICE_OBJECT pdo = fdoExtension->deviceRelations->Objects[i];
|
|
PHIDCLASS_DEVICE_EXTENSION pdoDevExt = pdo->DeviceExtension;
|
|
PDO_EXTENSION *pdoExt = &pdoDevExt->pdoExt;
|
|
|
|
if (!initialized != !(pdoExt->state == COLLECTION_STATE_UNINITIALIZED)){
|
|
result = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
result = !initialized;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpDeleteDeviceObjects
|
|
********************************************************************************
|
|
*
|
|
* Delete the device-FDO and collection-PDO's IF POSSIBLE.
|
|
* (must wait for REMOVE_DEVICE completion AND the IRP_MJ_CLOSE.
|
|
* Otherwise, return FALSE and we'll try again later.
|
|
*
|
|
*
|
|
*/
|
|
BOOLEAN HidpDeleteDeviceObjects(FDO_EXTENSION *fdoExt)
|
|
{
|
|
ULONG i;
|
|
|
|
/*
|
|
* Do this switch-a-roo to thwart re-entrancy problems.
|
|
*/
|
|
PDEVICE_OBJECT objToDelete = fdoExt->fdo;
|
|
fdoExt->fdo = BAD_POINTER;
|
|
|
|
if (ISPTR(fdoExt->deviceRelations)){
|
|
|
|
for (i = 0; i < fdoExt->deviceRelations->Count; i++){
|
|
PDO_EXTENSION *pdoExt = &fdoExt->collectionPdoExtensions[i]->pdoExt;
|
|
|
|
ASSERT(ISPTR(fdoExt->deviceRelations->Objects[i]));
|
|
|
|
if (ISPTR(pdoExt->name)){
|
|
RtlFreeUnicodeString(pdoExt->name);
|
|
ExFreePool(pdoExt->name);
|
|
pdoExt->name = BAD_POINTER;
|
|
}
|
|
|
|
/*
|
|
* Delete the client PDO.
|
|
* Don't touch the pdoExt after doing this.
|
|
*/
|
|
ObDereferenceObject(fdoExt->deviceRelations->Objects[i]);
|
|
IoDeleteDevice(fdoExt->deviceRelations->Objects[i]);
|
|
}
|
|
|
|
ExFreePool(fdoExt->deviceRelations);
|
|
}
|
|
fdoExt->deviceRelations = BAD_POINTER;
|
|
|
|
if (ISPTR(fdoExt->collectionPdoExtensions)){
|
|
ExFreePool(fdoExt->collectionPdoExtensions);
|
|
}
|
|
fdoExt->collectionPdoExtensions = BAD_POINTER;
|
|
|
|
ObDereferenceObject(objToDelete);
|
|
IoDeleteDevice(objToDelete);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* HidpQueryDeviceCapabilities
|
|
********************************************************************************
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
NTSTATUS HidpQueryDeviceCapabilities( IN PDEVICE_OBJECT PdoDeviceObject,
|
|
IN PDEVICE_CAPABILITIES DeviceCapabilities)
|
|
{
|
|
PIRP irp;
|
|
NTSTATUS status;
|
|
|
|
PAGED_CODE();
|
|
|
|
irp = IoAllocateIrp(PdoDeviceObject->StackSize, FALSE);
|
|
if (irp) {
|
|
PIO_STACK_LOCATION nextStack;
|
|
KEVENT event;
|
|
|
|
nextStack = IoGetNextIrpStackLocation(irp);
|
|
ASSERT(nextStack);
|
|
|
|
nextStack->MajorFunction= IRP_MJ_PNP;
|
|
nextStack->MinorFunction= IRP_MN_QUERY_CAPABILITIES;
|
|
irp->IoStatus.Status = STATUS_NOT_SUPPORTED;
|
|
|
|
KeInitializeEvent(&event, NotificationEvent, FALSE);
|
|
|
|
IoSetCompletionRoutine(irp,
|
|
HidpQueryCapsCompletion,
|
|
&event,
|
|
TRUE,
|
|
TRUE,
|
|
TRUE);
|
|
|
|
RtlZeroMemory(DeviceCapabilities, sizeof(DEVICE_CAPABILITIES));
|
|
|
|
/*
|
|
* Caller needs to initialize some fields
|
|
*/
|
|
DeviceCapabilities->Size = sizeof(DEVICE_CAPABILITIES);
|
|
DeviceCapabilities->Version = 1;
|
|
DeviceCapabilities->Address = -1;
|
|
DeviceCapabilities->UINumber = -1;
|
|
|
|
nextStack->Parameters.DeviceCapabilities.Capabilities = DeviceCapabilities;
|
|
|
|
status = IoCallDriver(PdoDeviceObject, irp);
|
|
|
|
if (status == STATUS_PENDING) {
|
|
KeWaitForSingleObject(
|
|
&event,
|
|
Suspended,
|
|
KernelMode,
|
|
FALSE,
|
|
NULL);
|
|
}
|
|
|
|
/*
|
|
* Note: we still own the IRP after the IoCallDriver() call
|
|
* because the completion routine returned
|
|
* STATUS_MORE_PROCESSING_REQUIRED.
|
|
*/
|
|
status = irp->IoStatus.Status;
|
|
|
|
IoFreeIrp(irp);
|
|
|
|
}
|
|
else {
|
|
status = STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
/*
|
|
********************************************************************************
|
|
* CheckReportPowerEvent
|
|
********************************************************************************
|
|
*
|
|
* Check whether the read report includes a power event.
|
|
* If it does, notify the system by completing the saved power-event Irp.
|
|
*
|
|
* Note: report should point to a "cooked" report with the report-id byte
|
|
* included at the beginning of the report, whether or not the device
|
|
* included the report id.
|
|
*
|
|
*/
|
|
VOID CheckReportPowerEvent( FDO_EXTENSION *fdoExt,
|
|
PHIDCLASS_COLLECTION collection,
|
|
PUCHAR report,
|
|
ULONG reportLen)
|
|
{
|
|
ULONG powerMask;
|
|
NTSTATUS status;
|
|
|
|
ASSERT(ISPTR(fdoExt->collectionPdoExtensions));
|
|
|
|
status = HidP_SysPowerEvent( report,
|
|
(USHORT)reportLen,
|
|
collection->phidDescriptor,
|
|
&powerMask);
|
|
if (NT_SUCCESS(status)){
|
|
|
|
if (powerMask){
|
|
/*
|
|
* This report contains a power event!
|
|
*/
|
|
|
|
PIRP irpToComplete = NULL;
|
|
KIRQL oldIrql;
|
|
|
|
KeAcquireSpinLock(&collection->powerEventSpinLock, &oldIrql);
|
|
|
|
/*
|
|
* We should have gotten a IOCTL_GET_SYS_BUTTON_EVENT earlier and queued
|
|
* an IRP to return now.
|
|
*/
|
|
if (ISPTR(collection->powerEventIrp)){
|
|
PDRIVER_CANCEL oldCancelRoutine;
|
|
|
|
/*
|
|
* "Dequeue" the power event IRP.
|
|
*/
|
|
irpToComplete = collection->powerEventIrp;
|
|
|
|
oldCancelRoutine = IoSetCancelRoutine(irpToComplete, NULL);
|
|
if (oldCancelRoutine){
|
|
ASSERT(oldCancelRoutine == PowerEventCancelRoutine);
|
|
}
|
|
else {
|
|
/*
|
|
* This IRP was cancelled and the cancel routine WAS called.
|
|
* The cancel routine will complete this IRP
|
|
* as soon as we drop the spinlock, so don't touch the IRP.
|
|
*/
|
|
ASSERT(irpToComplete->Cancel);
|
|
irpToComplete = NULL;
|
|
}
|
|
|
|
collection->powerEventIrp = BAD_POINTER;
|
|
}
|
|
else {
|
|
TRAP;
|
|
}
|
|
|
|
KeReleaseSpinLock(&collection->powerEventSpinLock, oldIrql);
|
|
|
|
/*
|
|
* If completing the IRP,
|
|
* do so after releasing all spinlocks.
|
|
*/
|
|
if (irpToComplete){
|
|
/*
|
|
* Complete the IRP with the power mask.
|
|
*
|
|
*/
|
|
ASSERT(irpToComplete->AssociatedIrp.SystemBuffer);
|
|
*(PULONG)irpToComplete->AssociatedIrp.SystemBuffer = powerMask;
|
|
irpToComplete->IoStatus.Information = sizeof(ULONG);
|
|
irpToComplete->IoStatus.Status = STATUS_SUCCESS;
|
|
IoCompleteRequest(irpToComplete, IO_NO_INCREMENT);
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
LONG WStrNCmpI(PWCHAR s1, PWCHAR s2, ULONG n)
|
|
{
|
|
ULONG result;
|
|
|
|
while (n && *s1 && *s2 && ((*s1|0x20) == (*s2|0x20))){
|
|
s1++, s2++;
|
|
n--;
|
|
}
|
|
|
|
if (n){
|
|
result = ((*s1|0x20) > (*s2|0x20)) ? 1 : ((*s1|0x20) < (*s2|0x20)) ? -1 : 0;
|
|
}
|
|
else {
|
|
result = 0;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
ULONG LAtoX(PWCHAR wHexString)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Convert a hex string (without the '0x' prefix) to a ULONG.
|
|
|
|
Arguments:
|
|
|
|
wHexString - null-terminated wide-char hex string
|
|
(with no "0x" prefix)
|
|
|
|
Return Value:
|
|
|
|
ULONG value
|
|
|
|
--*/
|
|
{
|
|
ULONG i, result = 0;
|
|
|
|
for (i = 0; wHexString[i]; i++){
|
|
if ((wHexString[i] >= L'0') && (wHexString[i] <= L'9')){
|
|
result *= 0x10;
|
|
result += (wHexString[i] - L'0');
|
|
}
|
|
else if ((wHexString[i] >= L'a') && (wHexString[i] <= L'f')){
|
|
result *= 0x10;
|
|
result += (wHexString[i] - L'a' + 0x0a);
|
|
}
|
|
else if ((wHexString[i] >= L'A') && (wHexString[i] <= L'F')){
|
|
result *= 0x10;
|
|
result += (wHexString[i] - L'A' + 0x0a);
|
|
}
|
|
else {
|
|
ASSERT(0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
ULONG WStrNCpy(PWCHAR dest, PWCHAR src, ULONG n)
|
|
{
|
|
ULONG result = 0;
|
|
|
|
while (n && (*dest++ = *src++)){
|
|
result++;
|
|
n--;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
NTSTATUS OpenSubkey( OUT PHANDLE Handle,
|
|
IN HANDLE BaseHandle,
|
|
IN PUNICODE_STRING KeyName,
|
|
IN ACCESS_MASK DesiredAccess
|
|
)
|
|
{
|
|
OBJECT_ATTRIBUTES objectAttributes;
|
|
NTSTATUS status;
|
|
|
|
PAGED_CODE();
|
|
|
|
InitializeObjectAttributes( &objectAttributes,
|
|
KeyName,
|
|
OBJ_CASE_INSENSITIVE,
|
|
BaseHandle,
|
|
(PSECURITY_DESCRIPTOR) NULL );
|
|
|
|
status = ZwOpenKey(Handle, DesiredAccess, &objectAttributes);
|
|
|
|
return status;
|
|
}
|
|
|
|
PVOID
|
|
HidpGetSystemAddressForMdlSafe(PMDL MdlAddress)
|
|
{
|
|
PVOID buf = NULL;
|
|
/*
|
|
* Can't call MmGetSystemAddressForMdlSafe in a WDM driver,
|
|
* so set the MDL_MAPPING_CAN_FAIL bit and check the result
|
|
* of the mapping.
|
|
*/
|
|
if (MdlAddress) {
|
|
MdlAddress->MdlFlags |= MDL_MAPPING_CAN_FAIL;
|
|
buf = MmGetSystemAddressForMdl(MdlAddress);
|
|
MdlAddress->MdlFlags &= (~MDL_MAPPING_CAN_FAIL);
|
|
}
|
|
else {
|
|
DBGASSERT(MdlAddress, ("MdlAddress passed into GetSystemAddress is NULL"), FALSE)
|
|
}
|
|
return buf;
|
|
}
|