reactos/drivers/filters/fltmgr/Dispatch.c

   1 /*
   2 * PROJECT:         Filesystem Filter Manager
   3 * LICENSE:         GPL - See COPYING in the top level directory
   4 * FILE:            drivers/filters/fltmgr/Dispatch.c
   5 * PURPOSE:         Contains dispatch handler routines
   6 * PROGRAMMERS:     Ged Murphy (gedmurphy@reactos.org)
   7 */
   8
   9 /* INCLUDES ******************************************************************/
  10
  11 #include "fltmgr.h"
  12 #include "fltmgrint.h"
  13 #include "fltmgr_shared.h"
  14
  15 #define NDEBUG
  16 #include <debug.h>
  17
  18
  19 /* DATA *********************************************************************/
  20
  21 NTSTATUS
  22 HandleLoadUnloadIoctl(
  23     _In_ PDEVICE_OBJECT DeviceObject,
  24     _Inout_ PIRP Irp
  25 );
  26
  27 NTSTATUS
  28 HandleFindFirstIoctl(
  29     _In_ PDEVICE_OBJECT DeviceObject,
  30     _Inout_ PIRP Irp
  31 );
  32
  33
  34 /* sdsfds *******************************************************************/
  35
  36 NTSTATUS
  37 FltpDeviceControlHandler(_In_ PDEVICE_OBJECT DeviceObject,
  38                          _Inout_ PIRP Irp)
  39 {
  40     PIO_STACK_LOCATION StackPtr;
  41     ULONG ControlCode;
  42     NTSTATUS Status;
  43
  44     StackPtr = IoGetCurrentIrpStackLocation(Irp);
  45     FLT_ASSERT(StackPtr->MajorFunction == IRP_MJ_DEVICE_CONTROL);
  46
  47     ControlCode = StackPtr->Parameters.DeviceIoControl.IoControlCode;
  48     switch (ControlCode)
  49     {
  50         case IOCTL_LOAD_FILTER:
  51             Status = HandleLoadUnloadIoctl(DeviceObject, Irp);
  52             break;
  53
  54         case IOCTL_UNLOAD_FILTER:
  55             Status = HandleLoadUnloadIoctl(DeviceObject, Irp);
  56             break;
  57
  58         case IOCTL_FIND_FIRST_FILTER:
  59             Status = HandleFindFirstIoctl(DeviceObject, Irp);
  60             break;
  61
  62         default:
  63             Status = STATUS_INVALID_PARAMETER;
  64             break;
  65     }
  66
  67     return Status;
  68 }
  69
  70 NTSTATUS
  71 FltpDispatchHandler(_In_ PDEVICE_OBJECT DeviceObject,
  72                     _Inout_ PIRP Irp)
  73 {
  74     PIO_STACK_LOCATION StackPtr;
  75     StackPtr = IoGetCurrentIrpStackLocation(Irp);
  76     UNREFERENCED_PARAMETER(StackPtr);
  77
  78     // implement me
  79
  80     return STATUS_SUCCESS;
  81 }
  82
  83
  84 /* INTERNAL FUNCTIONS ******************************************************/
  85
  86 NTSTATUS
  87 HandleLoadUnloadIoctl(_In_ PDEVICE_OBJECT DeviceObject,
  88                       _Inout_ PIRP Irp)
  89 {
  90     PIO_STACK_LOCATION StackPtr;
  91     UNICODE_STRING Name;
  92     PFILTER_NAME FilterName;
  93     ULONG BufferLength;
  94     ULONG ControlCode;
  95
  96     /* Get the IOCTL data from the stack pointer */
  97     StackPtr = IoGetCurrentIrpStackLocation(Irp);
  98     BufferLength = StackPtr->Parameters.DeviceIoControl.InputBufferLength;
  99     ControlCode = StackPtr->Parameters.DeviceIoControl.IoControlCode;
 100
 101     FLT_ASSERT(ControlCode == IOCTL_LOAD_FILTER || ControlCode == IOCTL_UNLOAD_FILTER);
 102
 103     /* Make sure the buffer is valid */
 104     if (BufferLength < sizeof(FILTER_NAME))
 105         return STATUS_INVALID_PARAMETER;
 106
 107     /* Convert the file name buffer into a string */
 108     FilterName = (PFILTER_NAME)Irp->AssociatedIrp.SystemBuffer;
 109     Name.Length = FilterName->Length;
 110     Name.MaximumLength = FilterName->Length;
 111     Name.Buffer = (PWCH)((PCHAR)FilterName + FIELD_OFFSET(FILTER_NAME, FilterName[0]));
 112
 113     /* Forward the request to our Flt routines */
 114     if (ControlCode == IOCTL_LOAD_FILTER)
 115     {
 116         return FltLoadFilter(&Name);
 117     }
 118     else
 119     {
 120         return FltUnloadFilter(&Name);
 121     }
 122 }
 123
 124 NTSTATUS
 125 HandleFindFirstIoctl(_In_ PDEVICE_OBJECT DeviceObject,
 126                      _Inout_ PIRP Irp)
 127 {
 128     return STATUS_NOT_SUPPORTED;
 129 }