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_FILTER_LOAD:
  51             Status = HandleLoadUnloadIoctl(DeviceObject, Irp);
  52             break;
  53
  54         case IOCTL_FILTER_UNLOAD:
  55             Status = HandleLoadUnloadIoctl(DeviceObject, Irp);
  56             break;
  57
  58         case IOCTL_FILTER_CREATE:
  59             Status = STATUS_NOT_SUPPORTED;
  60             break;
  61
  62         case IOCTL_FILTER_ATTATCH:
  63             Status = STATUS_NOT_SUPPORTED;
  64             break;
  65
  66         case IOCTL_FILTER_DETATCH:
  67             Status = STATUS_NOT_SUPPORTED;
  68             break;
  69
  70         case IOCTL_FILTER_SEND_MESSAGE:
  71             Status = STATUS_NOT_SUPPORTED;
  72             break;
  73
  74         case IOCTL_FILTER_GET_MESSAGE:
  75             Status = STATUS_NOT_SUPPORTED;
  76             break;
  77
  78         case IOCTL_FILTER_REPLY_MESSAGE:
  79             Status = STATUS_NOT_SUPPORTED;
  80             break;
  81
  82         case IOCTL_FILTER_FIND_FIRST:
  83             Status = STATUS_NOT_SUPPORTED;
  84             break;
  85
  86         case IOCTL_FILTER_FIND_NEXT:
  87             Status = STATUS_NOT_SUPPORTED;
  88             break;
  89
  90         case IOCTL_FILTER_GET_INFO:
  91             Status = STATUS_NOT_SUPPORTED;
  92             break;
  93
  94         default:
  95             Status = STATUS_INVALID_PARAMETER;
  96             break;
  97     }
  98
  99     return Status;
 100 }
 101
 102 NTSTATUS
 103 FltpDispatchHandler(_In_ PDEVICE_OBJECT DeviceObject,
 104                     _Inout_ PIRP Irp)
 105 {
 106     PIO_STACK_LOCATION StackPtr;
 107     StackPtr = IoGetCurrentIrpStackLocation(Irp);
 108     UNREFERENCED_PARAMETER(StackPtr);
 109
 110     // implement me
 111
 112     return STATUS_SUCCESS;
 113 }
 114
 115
 116 /* INTERNAL FUNCTIONS ******************************************************/
 117
 118 NTSTATUS
 119 HandleLoadUnloadIoctl(_In_ PDEVICE_OBJECT DeviceObject,
 120                       _Inout_ PIRP Irp)
 121 {
 122     PIO_STACK_LOCATION StackPtr;
 123     UNICODE_STRING Name;
 124     PFILTER_NAME FilterName;
 125     ULONG BufferLength;
 126     ULONG ControlCode;
 127     NTSTATUS Status;
 128
 129     /* Get the IOCTL data from the stack pointer */
 130     StackPtr = IoGetCurrentIrpStackLocation(Irp);
 131     BufferLength = StackPtr->Parameters.DeviceIoControl.InputBufferLength;
 132     ControlCode = StackPtr->Parameters.DeviceIoControl.IoControlCode;
 133
 134     FLT_ASSERT(ControlCode == IOCTL_FILTER_LOAD || ControlCode == IOCTL_FILTER_UNLOAD);
 135
 136     /* Make sure the buffer is valid */
 137     if (BufferLength < sizeof(FILTER_NAME))
 138         return STATUS_INVALID_PARAMETER;
 139
 140     /* Convert the file name buffer into a string */
 141     FilterName = (PFILTER_NAME)Irp->AssociatedIrp.SystemBuffer;
 142     Name.Length = FilterName->Length;
 143     Name.MaximumLength = FilterName->Length;
 144     Name.Buffer = (PWCH)((PCHAR)FilterName + FIELD_OFFSET(FILTER_NAME, FilterName[0]));
 145
 146     /* Forward the request to our Flt routines */
 147     if (ControlCode == IOCTL_FILTER_LOAD)
 148     {
 149         Status = FltLoadFilter(&Name);
 150     }
 151     else
 152     {
 153         Status = FltUnloadFilter(&Name);
 154     }
 155
 156     return Status;
 157 }