| 1 | #include <ntddk.h>
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| 2 |
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| 3 | #include "devdesc.h"
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| 4 |
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| 5 | #ifdef PNP_IDENTIFY
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| 6 |
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| 7 | #ifdef ALLOC_PRAGMA
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| 8 | #pragma alloc_text(INIT,LinkDeviceToDescription)
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| 9 | #endif
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| 10 |
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| 11 | NTSTATUS
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| 12 | LinkDeviceToDescription(
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| 13 | IN PUNICODE_STRING RegistryPath,
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| 14 | IN PUNICODE_STRING DeviceName,
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| 15 | IN INTERFACE_TYPE BusType,
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| 16 | IN ULONG BusNumber,
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| 17 | IN CONFIGURATION_TYPE ControllerType,
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| 18 | IN ULONG ControllerNumber,
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| 19 | IN CONFIGURATION_TYPE PeripheralType,
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| 20 | IN ULONG PeripheralNumber
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| 21 | )
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| 22 | {
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| 23 | //
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| 24 | // This routine will create a volatile "Description" key under the
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| 25 | // drivers service key. It will store values of the following form
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| 26 | // in that key:
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| 27 | //
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| 28 | // \\Device\\PointerPortX:REG_BINARY:...
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| 29 | // \\Device\\KeyboardPortX:REG_BINARY:...
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| 30 | //
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| 31 | // Where the binary data is six ULONG values (passed as parameters
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| 32 | // to this routine) that describe the physical location of the device.
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| 33 | //
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| 34 |
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| 35 | NTSTATUS Status = STATUS_SUCCESS;
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| 36 | HANDLE ServiceKey = NULL, DescriptionKey = NULL;
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| 37 | UNICODE_STRING RegString;
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| 38 | OBJECT_ATTRIBUTES ObjectAttributes;
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| 39 | ULONG disposition;
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| 40 | HWDESC_INFO HwDescInfo;
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| 41 |
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| 42 | HwDescInfo.InterfaceType = BusType;
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| 43 | HwDescInfo.InterfaceNumber = BusNumber;
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| 44 | HwDescInfo.ControllerType = ControllerType;
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| 45 | HwDescInfo.ControllerNumber = ControllerNumber;
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| 46 | HwDescInfo.PeripheralType = PeripheralType;
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| 47 | HwDescInfo.PeripheralNumber = PeripheralNumber;
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| 48 |
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| 49 |
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| 50 | //
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| 51 | // Open the service subkey
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| 52 | //
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| 53 | InitializeObjectAttributes(&ObjectAttributes,
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| 54 | RegistryPath,
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| 55 | OBJ_CASE_INSENSITIVE,
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| 56 | NULL,
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| 57 | NULL);
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| 58 |
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| 59 | Status = ZwOpenKey(&ServiceKey,
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| 60 | KEY_WRITE,
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| 61 | &ObjectAttributes);
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| 62 |
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| 63 | if (!NT_SUCCESS(Status)) {
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| 64 | goto Clean0;
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| 65 | }
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| 66 |
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| 67 | //
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| 68 | // Create a volatile Description subkey under the service subkey
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| 69 | //
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| 70 | RtlInitUnicodeString(&RegString, L"Description");
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| 71 |
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| 72 | InitializeObjectAttributes(&ObjectAttributes,
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| 73 | &RegString,
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| 74 | OBJ_CASE_INSENSITIVE,
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| 75 | ServiceKey,
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| 76 | NULL);
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| 77 |
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| 78 | Status = ZwCreateKey(&DescriptionKey,
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| 79 | KEY_ALL_ACCESS,
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| 80 | &ObjectAttributes,
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| 81 | 0,
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| 82 | (PUNICODE_STRING)NULL,
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| 83 | REG_OPTION_VOLATILE,
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| 84 | &disposition);
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| 85 |
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| 86 | if (!NT_SUCCESS(Status)) {
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| 87 | goto Clean0;
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| 88 | }
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| 89 |
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| 90 | //
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| 91 | // The description data is stored under a REG_BINARY value (name
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| 92 | // is the DeviceName passed in as a parameter)
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| 93 | //
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| 94 | Status = ZwSetValueKey(DescriptionKey,
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| 95 | DeviceName,
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| 96 | 0,
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| 97 | REG_BINARY,
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| 98 | &HwDescInfo,
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| 99 | sizeof(HwDescInfo));
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| 100 |
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| 101 |
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| 102 | Clean0:
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| 103 |
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| 104 | if (DescriptionKey) {
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| 105 | ZwClose(DescriptionKey);
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| 106 | }
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| 107 |
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| 108 | if (ServiceKey) {
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| 109 | ZwClose(ServiceKey);
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| 110 | }
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| 111 |
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| 112 | return Status;
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| 113 | }
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| 114 | #endif
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