IoWMISuggestInstanceName

NTSTATUS __stdcall IoWMISuggestInstanceName(
        _DEVICE_OBJECT *PhysicalDeviceObject,
        _UNICODE_STRING *SymbolicLinkName,
        UINT8 CombineNames,
        _UNICODE_STRING *SuggestedInstanceName){
  int DeviceProperty; 
  NTSTATUS result; 
  unsigned __int16 v10; 
  void *PoolWithTag; 
  NTSTATUS v12; 
  unsigned __int16 *v13; 
  WCHAR *v14; 
  ULONG v15; 
  wchar_t *v16; 
  wchar_t *v17; 
  ULONG BufferLength; 
  ULONG Length; 
  void *DeviceInterfaceRegKey; 
  struct _UNICODE_STRING ValueName; 
  DeviceInterfaceRegKey = 0i64;
  Length = 0;
  DeviceProperty = -1073741776;
  ValueName = 0i64;
  if( !WmipServiceDeviceObject )
    return -1073741823;
  v10 = 0;
  PoolWithTag = 0i64;
  BufferLength = 0;
  if( PhysicalDeviceObject )
  {
    result = IoGetDeviceProperty(PhysicalDeviceObject, DevicePropertyDeviceDescription, 0, 0i64, &BufferLength);
    DeviceProperty = result;
    if( result == -1073741789 )
    {
      PoolWithTag = ExAllocatePoolWithTag(PagedPool, BufferLength, 0x70696D57ui64);
      if( !PoolWithTag )
        return -1073741670;
      DeviceProperty = IoGetDeviceProperty(
                         PhysicalDeviceObject,
                         DevicePropertyDeviceDescription,
                         BufferLength,
                         PoolWithTag,
                         &BufferLength);
      if( DeviceProperty < 0 )
        goto LABEL_35;
    }
    else if( result < 0 )
    {
      return result;
    }
    v10 = BufferLength;
  }
  if( !SymbolicLinkName )
  {
    if( PoolWithTag )
    {
      SuggestedInstanceName->Buffer = (wchar_t *)PoolWithTag;
      SuggestedInstanceName->Length = v10 - 2;
      SuggestedInstanceName->MaximumLength = v10;
    }
    else
    {
      SuggestedInstanceName->Buffer = 0i64;
      *(_DWORD *)&SuggestedInstanceName->Length = 0;
    }
    return DeviceProperty;
  }
  DeviceProperty = IoOpenDeviceInterfaceRegistryKey(SymbolicLinkName, 0xF003Fui64, &DeviceInterfaceRegKey);
  if( DeviceProperty >= 0 )
  {
    v12 = ZwQueryValueKey(DeviceInterfaceRegKey, &ValueName, KeyValueFullInformation, 0i64, 0, &Length);
    DeviceProperty = v12;
    if( v12 == -2147483643 || v12 == -1073741789 )
    {
      v13 = (unsigned __int16 *)ExAllocatePoolWithTag(PagedPool, Length, 0x70696D57ui64);
      if( v13 )
      {
        DeviceProperty = ZwQueryValueKey(
                           DeviceInterfaceRegKey,
                           &ValueName,
                           KeyValueFullInformation,
                           v13,
                           Length,
                           &Length);
        if( DeviceProperty >= 0 )
        {
          v14 = (unsigned __int16 *)((char *)v13 + *((unsigned int *)v13 + 2));
          if( CombineNames )
          {
            v15 = *((_DWORD *)v13 + 3) + BufferLength + 2;
            v16 = (wchar_t *)ExAllocatePoolWithTag(PagedPool, v15, 0x70696D57ui64);
            if( v16 )
            {
              SuggestedInstanceName->Buffer = v16;
              SuggestedInstanceName->Length = 0;
              SuggestedInstanceName->MaximumLength = v15;
              if( PoolWithTag )
                RtlAppendUnicodeToString(SuggestedInstanceName, (PWCHAR)PoolWithTag);
              RtlAppendUnicodeToString(SuggestedInstanceName, (PWCHAR)&stru_1407CDE30.OutputLength);
              RtlAppendUnicodeToString(SuggestedInstanceName, v14);
            }
            else
            {
              DeviceProperty = -1073741670;
            }
            if( PoolWithTag )
            {
              ExFreePoolWithTag(PoolWithTag, 0);
              PoolWithTag = 0i64;
            }
          }
          else
          {
            if( PoolWithTag )
            {
              ExFreePoolWithTag(PoolWithTag, 0);
              PoolWithTag = 0i64;
            }
            v17 = (wchar_t *)ExAllocatePoolWithTag(PagedPool, *((unsigned int *)v13 + 3), 0x70696D57ui64);
            if( v17 )
            {
              SuggestedInstanceName->Buffer = v17;
              SuggestedInstanceName->Length = 0;
              SuggestedInstanceName->MaximumLength = v13[6];
              RtlAppendUnicodeToString(SuggestedInstanceName, v14);
            }
            else
            {
              DeviceProperty = -1073741670;
            }
          }
        }
        ExFreePoolWithTag(v13, 0);
      }
      else
      {
        DeviceProperty = -1073741670;
      }
    }
    ZwClose(DeviceInterfaceRegKey);
  }
  if( !PoolWithTag || DeviceProperty >= 0 )
    return DeviceProperty;
LABEL_35:
  ExFreePoolWithTag(PoolWithTag, 0);
  return DeviceProperty;
}

Referenced by: