drivers/wdm/audio/legacy/wdmaud/sup.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS Kernel Streaming
   4  * FILE:            drivers/wdm/audio/legacy/wdmaud/sup.c
   5  * PURPOSE:         Misc support routines
   6  * PROGRAMMER:      Andrew Greenwood
   7  *                  Johannes Anderwald
   8  */
   9
  10 #include "wdmaud.h"
  11
  12 #include <stdio.h>
  13
  14 #define NDEBUG
  15 #include <debug.h>
  16
  17 PVOID
  18 AllocateItem(
  19     IN POOL_TYPE PoolType,
  20     IN SIZE_T NumberOfBytes)
  21 {
  22     PVOID Item = ExAllocatePool(PoolType, NumberOfBytes);
  23     if (!Item)
  24         return Item;
  25
  26     RtlZeroMemory(Item, NumberOfBytes);
  27     return Item;
  28 }
  29
  30 VOID
  31 FreeItem(
  32     IN PVOID Item)
  33 {
  34     ExFreePool(Item);
  35 }
  36
  37
  38
  39 ULONG
  40 GetSysAudioDeviceCount(
  41     IN  PDEVICE_OBJECT DeviceObject)
  42 {
  43     PWDMAUD_DEVICE_EXTENSION DeviceExtension;
  44     KSPROPERTY Pin;
  45     ULONG Count, BytesReturned;
  46     NTSTATUS Status;
  47
  48     /* setup the query request */
  49     Pin.Set = KSPROPSETID_Sysaudio;
  50     Pin.Id = KSPROPERTY_SYSAUDIO_DEVICE_COUNT;
  51     Pin.Flags = KSPROPERTY_TYPE_GET;
  52
  53     DeviceExtension = (PWDMAUD_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
  54
  55     /* query sysaudio for the device count */
  56     Status = KsSynchronousIoControlDevice(DeviceExtension->FileObject, KernelMode, IOCTL_KS_PROPERTY, (PVOID)&Pin, sizeof(KSPROPERTY), (PVOID)&Count, sizeof(ULONG), &BytesReturned);
  57     if (!NT_SUCCESS(Status))
  58         return 0;
  59
  60     return Count;
  61 }
  62
  63
  64 NTSTATUS
  65 SetIrpIoStatus(
  66     IN PIRP Irp,
  67     IN NTSTATUS Status,
  68     IN ULONG Length)
  69 {
  70     Irp->IoStatus.Information = Length;
  71     Irp->IoStatus.Status = Status;
  72     IoCompleteRequest(Irp, IO_NO_INCREMENT);
  73     return Status;
  74
  75 }
  76
  77 ULONG
  78 ClosePin(
  79     IN  PWDMAUD_CLIENT ClientInfo,
  80     IN  ULONG FilterId,
  81     IN  ULONG PinId,
  82     IN  SOUND_DEVICE_TYPE DeviceType)
  83 {
  84     ULONG Index;
  85
  86     for(Index = 0; Index < ClientInfo->NumPins; Index++)
  87     {
  88         if (ClientInfo->hPins[Index].FilterId == FilterId && ClientInfo->hPins[Index].PinId == PinId && ClientInfo->hPins[Index].Handle && ClientInfo->hPins[Index].Type == DeviceType)
  89         {
  90             if (ClientInfo->hPins[Index].Type != MIXER_DEVICE_TYPE)
  91             {
  92                 ZwClose(ClientInfo->hPins[Index].Handle);
  93             }
  94             ClientInfo->hPins[Index].Handle = NULL;
  95             return Index;
  96         }
  97     }
  98     return MAXULONG;
  99 }
 100
 101 NTSTATUS
 102 InsertPinHandle(
 103     IN  PWDMAUD_CLIENT ClientInfo,
 104     IN  ULONG FilterId,
 105     IN  ULONG PinId,
 106     IN  SOUND_DEVICE_TYPE DeviceType,
 107     IN  HANDLE PinHandle,
 108     IN  ULONG FreeIndex)
 109 {
 110     PWDMAUD_HANDLE Handles;
 111
 112     if (FreeIndex != MAXULONG)
 113     {
 114         /* re-use a free index */
 115         ClientInfo->hPins[FreeIndex].Handle = PinHandle;
 116         ClientInfo->hPins[FreeIndex].FilterId = FilterId;
 117         ClientInfo->hPins[FreeIndex].PinId = PinId;
 118         ClientInfo->hPins[FreeIndex].Type = DeviceType;
 119
 120         return STATUS_SUCCESS;
 121     }
 122
 123     Handles = AllocateItem(NonPagedPool, sizeof(WDMAUD_HANDLE) * (ClientInfo->NumPins+1));
 124
 125     if (!Handles)
 126         return STATUS_INSUFFICIENT_RESOURCES;
 127
 128     if (ClientInfo->NumPins)
 129     {
 130         RtlMoveMemory(Handles, ClientInfo->hPins, sizeof(WDMAUD_HANDLE) * ClientInfo->NumPins);
 131         FreeItem(ClientInfo->hPins);
 132     }
 133
 134     ClientInfo->hPins = Handles;
 135     ClientInfo->hPins[ClientInfo->NumPins].Handle = PinHandle;
 136     ClientInfo->hPins[ClientInfo->NumPins].Type = DeviceType;
 137     ClientInfo->hPins[ClientInfo->NumPins].FilterId = FilterId;
 138     ClientInfo->hPins[ClientInfo->NumPins].PinId = PinId;
 139     ClientInfo->NumPins++;
 140
 141     return STATUS_SUCCESS;
 142 }
 143
 144 PKEY_VALUE_PARTIAL_INFORMATION
 145 ReadKeyValue(
 146     IN HANDLE hSubKey,
 147     IN PUNICODE_STRING KeyName)
 148 {
 149     NTSTATUS Status;
 150     ULONG Length;
 151     PKEY_VALUE_PARTIAL_INFORMATION PartialInformation;
 152
 153     /* now query MatchingDeviceId key */
 154     Status = ZwQueryValueKey(hSubKey, KeyName, KeyValuePartialInformation, NULL, 0, &Length);
 155
 156     /* check for success */
 157     if (Status != STATUS_BUFFER_TOO_SMALL)
 158         return NULL;
 159
 160     /* allocate a buffer for key data */
 161     PartialInformation = AllocateItem(NonPagedPool, Length);
 162
 163     if (!PartialInformation)
 164         return NULL;
 165
 166
 167     /* now query MatchingDeviceId key */
 168     Status = ZwQueryValueKey(hSubKey, KeyName, KeyValuePartialInformation, PartialInformation, Length, &Length);
 169
 170     /* check for success */
 171     if (!NT_SUCCESS(Status))
 172     {
 173         FreeItem(PartialInformation);
 174         return NULL;
 175     }
 176
 177     if (PartialInformation->Type != REG_SZ)
 178     {
 179         /* invalid key type */
 180         FreeItem(PartialInformation);
 181         return NULL;
 182     }
 183
 184     return PartialInformation;
 185 }
 186
 187
 188 NTSTATUS
 189 CompareProductName(
 190     IN HANDLE hSubKey,
 191     IN LPWSTR PnpName,
 192     IN ULONG ProductNameSize,
 193     OUT LPWSTR ProductName)
 194 {
 195     PKEY_VALUE_PARTIAL_INFORMATION PartialInformation;
 196     UNICODE_STRING DriverDescName = RTL_CONSTANT_STRING(L"DriverDesc");
 197     UNICODE_STRING MatchingDeviceIdName = RTL_CONSTANT_STRING(L"MatchingDeviceId");
 198     ULONG Length;
 199     LPWSTR DeviceName;
 200
 201     /* read MatchingDeviceId value */
 202     PartialInformation = ReadKeyValue(hSubKey, &MatchingDeviceIdName);
 203
 204     if (!PartialInformation)
 205         return STATUS_UNSUCCESSFUL;
 206
 207
 208     /* extract last '&' */
 209     DeviceName = wcsrchr((LPWSTR)PartialInformation->Data, L'&');
 210     ASSERT(DeviceName);
 211     /* terminate it */
 212     DeviceName[0] = L'\0';
 213
 214     Length = wcslen((LPWSTR)PartialInformation->Data);
 215
 216     DPRINT("DeviceName %S PnpName %S Length %u\n", (LPWSTR)PartialInformation->Data, PnpName, Length);
 217
 218     if (_wcsnicmp((LPWSTR)PartialInformation->Data, &PnpName[4], Length))
 219     {
 220         FreeItem(PartialInformation);
 221         return STATUS_NO_MATCH;
 222     }
 223
 224     /* free buffer */
 225     FreeItem(PartialInformation);
 226
 227     /* read DriverDescName value */
 228     PartialInformation = ReadKeyValue(hSubKey, &DriverDescName);
 229
 230     if (!PartialInformation)
 231     {
 232         /* failed to read driver desc key */
 233         return STATUS_UNSUCCESSFUL;
 234     }
 235
 236     /* copy key name */
 237     Length = min(ProductNameSize * sizeof(WCHAR), PartialInformation->DataLength);
 238     RtlMoveMemory(ProductName, (PVOID)PartialInformation->Data, Length);
 239
 240     /* zero terminate it */
 241     ProductName[ProductNameSize-1] = L'\0';
 242
 243     /* free buffer */
 244     FreeItem(PartialInformation);
 245
 246     return STATUS_SUCCESS;
 247 }
 248
 249
 250
 251 NTSTATUS
 252 FindProductName(
 253     IN LPWSTR PnpName,
 254     IN ULONG ProductNameSize,
 255     OUT LPWSTR ProductName)
 256 {
 257     UNICODE_STRING KeyName = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\Class\\{4D36E96C-E325-11CE-BFC1-08002BE10318}");
 258
 259     UNICODE_STRING SubKeyName;
 260     WCHAR SubKey[20];
 261     OBJECT_ATTRIBUTES ObjectAttributes;
 262     HANDLE hKey, hSubKey;
 263     NTSTATUS Status;
 264     ULONG Length, Index;
 265     PKEY_FULL_INFORMATION KeyInformation;
 266
 267     for(Index = 0; Index < wcslen(PnpName); Index++)
 268     {
 269         if (PnpName[Index] == '#')
 270             PnpName[Index] = L'\\';
 271     }
 272
 273
 274     /* initialize key attributes */
 275     InitializeObjectAttributes(&ObjectAttributes, &KeyName, OBJ_CASE_INSENSITIVE | OBJ_OPENIF, NULL, NULL);
 276
 277     /* open the key */
 278     Status = ZwOpenKey(&hKey, GENERIC_READ, &ObjectAttributes);
 279
 280     /* check for success */
 281     if (!NT_SUCCESS(Status))
 282         return Status;
 283
 284     /* query num of subkeys */
 285     Status = ZwQueryKey(hKey, KeyFullInformation, NULL, 0, &Length);
 286
 287     if (Status != STATUS_BUFFER_TOO_SMALL)
 288     {
 289         DPRINT1("ZwQueryKey failed with %x\n", Status);
 290         /* failed */
 291         ZwClose(hKey);
 292         return Status;
 293     }
 294
 295     /* allocate key information struct */
 296     KeyInformation = AllocateItem(NonPagedPool, Length);
 297     if (!KeyInformation)
 298     {
 299         /* no memory */
 300         ZwClose(hKey);
 301         return STATUS_INSUFFICIENT_RESOURCES;
 302     }
 303
 304     /* query num of subkeys */
 305     Status = ZwQueryKey(hKey, KeyFullInformation, (PVOID)KeyInformation, Length, &Length);
 306
 307     if (!NT_SUCCESS(Status))
 308     {
 309         DPRINT1("ZwQueryKey failed with %x\n", Status);
 310         FreeItem(KeyInformation);
 311         ZwClose(hKey);
 312         return Status;
 313     }
 314
 315     /* now iterate through all subkeys */
 316     for(Index = 0; Index < KeyInformation->SubKeys; Index++)
 317     {
 318         /* subkeys are always in the format 0000-XXXX */
 319         swprintf(SubKey, L"%04u", Index);
 320
 321         /* initialize subkey name */
 322         RtlInitUnicodeString(&SubKeyName, SubKey);
 323
 324         /* initialize key attributes */
 325         InitializeObjectAttributes(&ObjectAttributes, &SubKeyName, OBJ_CASE_INSENSITIVE | OBJ_OPENIF, hKey, NULL);
 326
 327         /* open the sub key */
 328         Status = ZwOpenKey(&hSubKey, GENERIC_READ, &ObjectAttributes);
 329
 330         /* check for success */
 331         if (NT_SUCCESS(Status))
 332         {
 333             /* compare product name */
 334             Status = CompareProductName(hSubKey, PnpName, ProductNameSize, ProductName);
 335
 336             /* close subkey */
 337             ZwClose(hSubKey);
 338
 339             if (NT_SUCCESS(Status))
 340                 break;
 341         }
 342     }
 343
 344     /* free buffer */
 345     FreeItem(KeyInformation);
 346
 347     /* close key */
 348     ZwClose(hKey);
 349
 350     /* no matching key found */
 351     return Status;
 352 }
 353
 354 NTSTATUS
 355 GetSysAudioDevicePnpName(
 356     IN  PDEVICE_OBJECT DeviceObject,
 357     IN  ULONG DeviceIndex,
 358     OUT LPWSTR * Device)
 359 {
 360     ULONG BytesReturned;
 361     KSP_PIN Pin;
 362     NTSTATUS Status;
 363     PWDMAUD_DEVICE_EXTENSION DeviceExtension;
 364
 365    /* first check if the device index is within bounds */
 366    if (DeviceIndex >= GetSysAudioDeviceCount(DeviceObject))
 367        return STATUS_INVALID_PARAMETER;
 368
 369     /* setup the query request */
 370     Pin.Property.Set = KSPROPSETID_Sysaudio;
 371     Pin.Property.Id = KSPROPERTY_SYSAUDIO_DEVICE_INTERFACE_NAME;
 372     Pin.Property.Flags = KSPROPERTY_TYPE_GET;
 373     Pin.PinId = DeviceIndex;
 374
 375     DeviceExtension = (PWDMAUD_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
 376
 377     /* query sysaudio for the device path */
 378     Status = KsSynchronousIoControlDevice(DeviceExtension->FileObject, KernelMode, IOCTL_KS_PROPERTY, (PVOID)&Pin, sizeof(KSPROPERTY) + sizeof(ULONG), NULL, 0, &BytesReturned);
 379
 380     /* check if the request failed */
 381     if (Status != STATUS_BUFFER_TOO_SMALL || BytesReturned == 0)
 382         return STATUS_UNSUCCESSFUL;
 383
 384     /* allocate buffer for the device */
 385     *Device = AllocateItem(NonPagedPool, BytesReturned);
 386     if (!Device)
 387         return STATUS_INSUFFICIENT_RESOURCES;
 388
 389     /* query sysaudio again for the device path */
 390     Status = KsSynchronousIoControlDevice(DeviceExtension->FileObject, KernelMode, IOCTL_KS_PROPERTY, (PVOID)&Pin, sizeof(KSPROPERTY) + sizeof(ULONG), (PVOID)*Device, BytesReturned, &BytesReturned);
 391
 392     if (!NT_SUCCESS(Status))
 393     {
 394         /* failed */
 395         FreeItem(*Device);
 396         return Status;
 397     }
 398
 399     return Status;
 400 }
 401
 402 NTSTATUS
 403 OpenDevice(
 404     IN LPWSTR Device,
 405     OUT PHANDLE DeviceHandle,
 406     OUT PFILE_OBJECT * FileObject)
 407 {
 408     NTSTATUS Status;
 409     HANDLE hDevice;
 410
 411     /* now open the device */
 412     Status = WdmAudOpenSysAudioDevice(Device, &hDevice);
 413
 414     if (!NT_SUCCESS(Status))
 415     {
 416         return Status;
 417     }
 418
 419     *DeviceHandle = hDevice;
 420
 421     if (FileObject)
 422     {
 423         Status = ObReferenceObjectByHandle(hDevice, FILE_READ_DATA | FILE_WRITE_DATA, *IoFileObjectType, KernelMode, (PVOID*)FileObject, NULL);
 424
 425         if (!NT_SUCCESS(Status))
 426         {
 427             ZwClose(hDevice);
 428         }
 429     }
 430
 431     return Status;
 432
 433 }