dispatcher.cpp File Reference

#include "private.hpp"
#include <debug.h>

Include dependency graph for dispatcher.cpp:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
NTSTATUS NTAPI	Dispatch_fnDeviceIoControl (PDEVICE_OBJECT DeviceObject, PIRP Irp)
NTSTATUS NTAPI	Dispatch_fnRead (PDEVICE_OBJECT DeviceObject, PIRP Irp)
NTSTATUS NTAPI	Dispatch_fnWrite (PDEVICE_OBJECT DeviceObject, PIRP Irp)
NTSTATUS NTAPI	Dispatch_fnFlush (PDEVICE_OBJECT DeviceObject, PIRP Irp)
NTSTATUS NTAPI	Dispatch_fnClose (PDEVICE_OBJECT DeviceObject, PIRP Irp)
NTSTATUS NTAPI	Dispatch_fnQuerySecurity (PDEVICE_OBJECT DeviceObject, PIRP Irp)
NTSTATUS NTAPI	Dispatch_fnSetSecurity (PDEVICE_OBJECT DeviceObject, PIRP Irp)
BOOLEAN NTAPI	Dispatch_fnFastDeviceIoControl (PFILE_OBJECT FileObject, BOOLEAN Wait, PVOID InputBuffer, ULONG InputBufferLength, PVOID OutputBuffer, ULONG OutputBufferLength, ULONG IoControlCode, PIO_STATUS_BLOCK IoStatus, PDEVICE_OBJECT DeviceObject)
BOOLEAN NTAPI	Dispatch_fnFastRead (PFILE_OBJECT FileObject, PLARGE_INTEGER FileOffset, ULONG Length, BOOLEAN Wait, ULONG LockKey, PVOID Buffer, PIO_STATUS_BLOCK IoStatus, PDEVICE_OBJECT DeviceObject)
BOOLEAN NTAPI	Dispatch_fnFastWrite (PFILE_OBJECT FileObject, PLARGE_INTEGER FileOffset, ULONG Length, BOOLEAN Wait, ULONG LockKey, PVOID Buffer, PIO_STATUS_BLOCK IoStatus, PDEVICE_OBJECT DeviceObject)
NTSTATUS NTAPI	NewDispatchObject (IN PIRP Irp, IN IIrpTarget *Target, IN ULONG CreateItemCount, IN PKSOBJECT_CREATE_ITEM CreateItem)

Variables
static KSDISPATCH_TABLE	DispatchTable

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 11 of file dispatcher.cpp.

Function Documentation

Dispatch_fnClose()

NTSTATUS NTAPI Dispatch_fnClose	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp
	)

Definition at line 92 of file dispatcher.cpp.

{
    PIO_STACK_LOCATION IoStack;
    PDISPATCH_CONTEXT DispatchContext;
    NTSTATUS Status;
 
    // get current irp stack
    IoStack = IoGetCurrentIrpStackLocation(Irp);
    // get dispatch context
    DispatchContext = (PDISPATCH_CONTEXT)IoStack->FileObject->FsContext;
 
    // let IrpTarget handle request
    Status = DispatchContext->Target->Close(DeviceObject, Irp);
 
    if (NT_SUCCESS(Status))
    {
       KsFreeObjectHeader(DispatchContext->ObjectHeader);
       FreeItem(DispatchContext, TAG_PORTCLASS);
    }
    // done
    return Status;
}

Dispatch_fnDeviceIoControl()

NTSTATUS NTAPI Dispatch_fnDeviceIoControl	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp
	)

Definition at line 16 of file dispatcher.cpp.

{
    PIO_STACK_LOCATION IoStack;
    PDISPATCH_CONTEXT DispatchContext;
 
    // get current irp stack
    IoStack = IoGetCurrentIrpStackLocation(Irp);
 
    // get dispatch context
    DispatchContext = (PDISPATCH_CONTEXT)IoStack->FileObject->FsContext;
 
    // let IrpTarget handle request
    return DispatchContext->Target->DeviceIoControl(DeviceObject, Irp);
}

Dispatch_fnFastDeviceIoControl()

BOOLEAN NTAPI Dispatch_fnFastDeviceIoControl	(	PFILE_OBJECT	FileObject,
		BOOLEAN	Wait,
		PVOID	InputBuffer,
		ULONG	InputBufferLength,
		PVOID	OutputBuffer,
		ULONG	OutputBufferLength,
		ULONG	IoControlCode,
		PIO_STATUS_BLOCK	IoStatus,
		PDEVICE_OBJECT	DeviceObject
	)

Definition at line 157 of file dispatcher.cpp.

{
    PDISPATCH_CONTEXT DispatchContext;
 
    // get dispatch context
    DispatchContext = (PDISPATCH_CONTEXT)FileObject->FsContext;
 
    // let IrpTarget handle request
    return DispatchContext->Target->FastDeviceIoControl(FileObject, Wait, InputBuffer, InputBufferLength, OutputBuffer, OutputBufferLength, IoControlCode, IoStatus, DeviceObject);
}

Dispatch_fnFastRead()

BOOLEAN NTAPI Dispatch_fnFastRead	(	PFILE_OBJECT	FileObject,
		PLARGE_INTEGER	FileOffset,
		ULONG	Length,
		BOOLEAN	Wait,
		ULONG	LockKey,
		PVOID	Buffer,
		PIO_STATUS_BLOCK	IoStatus,
		PDEVICE_OBJECT	DeviceObject
	)

Definition at line 179 of file dispatcher.cpp.

{
    PDISPATCH_CONTEXT DispatchContext;
 
    // get dispatch context
    DispatchContext = (PDISPATCH_CONTEXT)FileObject->FsContext;
 
    // let IrpTarget handle request
    return DispatchContext->Target->FastRead(FileObject, FileOffset, Length, Wait, LockKey, Buffer, IoStatus, DeviceObject);
}

Dispatch_fnFastWrite()

BOOLEAN NTAPI Dispatch_fnFastWrite	(	PFILE_OBJECT	FileObject,
		PLARGE_INTEGER	FileOffset,
		ULONG	Length,
		BOOLEAN	Wait,
		ULONG	LockKey,
		PVOID	Buffer,
		PIO_STATUS_BLOCK	IoStatus,
		PDEVICE_OBJECT	DeviceObject
	)

Definition at line 200 of file dispatcher.cpp.

{
    PDISPATCH_CONTEXT DispatchContext;
 
    // get dispatch context
    DispatchContext = (PDISPATCH_CONTEXT)FileObject->FsContext;
    // let IrpTarget handle request
    return DispatchContext->Target->FastWrite(FileObject, FileOffset, Length, Wait, LockKey, Buffer, IoStatus, DeviceObject);
}

Dispatch_fnFlush()

NTSTATUS NTAPI Dispatch_fnFlush	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp
	)

Definition at line 73 of file dispatcher.cpp.

{
    PIO_STACK_LOCATION IoStack;
    PDISPATCH_CONTEXT DispatchContext;
 
    // get current irp stack
    IoStack = IoGetCurrentIrpStackLocation(Irp);
 
    // get dispatch context
    DispatchContext = (PDISPATCH_CONTEXT)IoStack->FileObject->FsContext;
 
    // let IrpTarget handle request
    return DispatchContext->Target->Flush(DeviceObject, Irp);
}

Dispatch_fnQuerySecurity()

NTSTATUS NTAPI Dispatch_fnQuerySecurity	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp
	)

Definition at line 119 of file dispatcher.cpp.

{
    PIO_STACK_LOCATION IoStack;
    PDISPATCH_CONTEXT DispatchContext;
 
    // get current irp stack
    IoStack = IoGetCurrentIrpStackLocation(Irp);
 
    // get dispatch context
    DispatchContext = (PDISPATCH_CONTEXT)IoStack->FileObject->FsContext;
 
    // let IrpTarget handle request
    return DispatchContext->Target->QuerySecurity(DeviceObject, Irp);
}

Dispatch_fnRead()

NTSTATUS NTAPI Dispatch_fnRead	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp
	)

Definition at line 35 of file dispatcher.cpp.

{
    PIO_STACK_LOCATION IoStack;
    PDISPATCH_CONTEXT DispatchContext;
 
    // get current irp stack
    IoStack = IoGetCurrentIrpStackLocation(Irp);
 
    // get dispatch context
    DispatchContext = (PDISPATCH_CONTEXT)IoStack->FileObject->FsContext;
 
    // let IrpTarget handle request
    return DispatchContext->Target->Read(DeviceObject, Irp);
}

Dispatch_fnSetSecurity()

NTSTATUS NTAPI Dispatch_fnSetSecurity	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp
	)

Definition at line 138 of file dispatcher.cpp.

{
    PIO_STACK_LOCATION IoStack;
    PDISPATCH_CONTEXT DispatchContext;
 
    // get current irp stack
    IoStack = IoGetCurrentIrpStackLocation(Irp);
 
    // get dispatch context
    DispatchContext = (PDISPATCH_CONTEXT)IoStack->FileObject->FsContext;
 
    // let IrpTarget handle request
    return DispatchContext->Target->SetSecurity(DeviceObject, Irp);
}

Dispatch_fnWrite()

NTSTATUS NTAPI Dispatch_fnWrite	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp
	)

Definition at line 54 of file dispatcher.cpp.

{
    PIO_STACK_LOCATION IoStack;
    PDISPATCH_CONTEXT DispatchContext;
 
    // get current irp stack
    IoStack = IoGetCurrentIrpStackLocation(Irp);
 
    // get dispatch context
    DispatchContext = (PDISPATCH_CONTEXT)IoStack->FileObject->FsContext;
 
    // let IrpTarget handle request
    return DispatchContext->Target->Write(DeviceObject, Irp);
}

NewDispatchObject()

NTSTATUS NTAPI NewDispatchObject	(	IN PIRP	Irp,
		IN IIrpTarget *	Target,
		IN ULONG	CreateItemCount,
		IN PKSOBJECT_CREATE_ITEM	CreateItem
	)

Definition at line 234 of file dispatcher.cpp.

{
    NTSTATUS Status;
    KSOBJECT_HEADER ObjectHeader;
    PIO_STACK_LOCATION IoStack;
    PDISPATCH_CONTEXT DispatchContext;
 
    // get current irp stack location
    IoStack = IoGetCurrentIrpStackLocation(Irp);
 
    DispatchContext = (PDISPATCH_CONTEXT)AllocateItem(NonPagedPool, sizeof(DISPATCH_CONTEXT), TAG_PORTCLASS);
    if (!DispatchContext)
        return STATUS_INSUFFICIENT_RESOURCES;
 
    // allocate object header
    Status = KsAllocateObjectHeader(&ObjectHeader, CreateItemCount, CreateItem, Irp, &DispatchTable);
 
    if (!NT_SUCCESS(Status))
    {
        // free dispatch context
        FreeItem(DispatchContext, TAG_PORTCLASS);
        // done
        return Status;
    }
 
    // initialize dispatch context
    DispatchContext->ObjectHeader = ObjectHeader;
    DispatchContext->Target = Target;
    DispatchContext->CreateItem = CreateItem;
 
    // store dispatch context
    IoStack->FileObject->FsContext = DispatchContext;
 
    DPRINT("KsAllocateObjectHeader result %x Target %p Context %p\n", Status, Target, DispatchContext);
    return Status;
}

Referenced by PcCreateItemDispatch(), and PcCreatePinDispatch().

Variable Documentation

DispatchTable

KSDISPATCH_TABLE DispatchTable

static

Initial value:

=
{
    Dispatch_fnDeviceIoControl,
    Dispatch_fnRead,
    Dispatch_fnWrite,
    Dispatch_fnFlush,
    Dispatch_fnClose,
    Dispatch_fnQuerySecurity,
    Dispatch_fnSetSecurity,
    Dispatch_fnFastDeviceIoControl,
    Dispatch_fnFastRead,
    Dispatch_fnFastWrite,
}

Definition at line 218 of file dispatcher.cpp.