dispatch.c File Reference

#include "sacdrv.h"

Include dependency graph for dispatch.c:

Go to the source code of this file.

Functions
NTSTATUS NTAPI	DispatchDeviceControl (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
NTSTATUS NTAPI	DispatchShutdownControl (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
NTSTATUS NTAPI	DispatchCreate (IN PSAC_DEVICE_EXTENSION DeviceExtension, IN PIRP Irp)
NTSTATUS NTAPI	DispatchClose (IN PSAC_DEVICE_EXTENSION DeviceExtension, IN PIRP Irp)
NTSTATUS NTAPI	Dispatch (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
VOID NTAPI	TimerDpcRoutine (IN PKDPC Dpc, IN PVOID DeferredContext, IN PVOID SystemArgument1, IN PVOID SystemArgument2)
VOID NTAPI	UnloadHandler (IN PDRIVER_OBJECT DriverObject)

Variables
LONG	TimerDpcCount

Function Documentation

Dispatch()

NTSTATUS NTAPI Dispatch	(	IN PDEVICE_OBJECT	DeviceObject,
		IN PIRP	Irp
	)

Definition at line 53 of file dispatch.c.

{
    return STATUS_NOT_IMPLEMENTED;
}

DispatchClose()

NTSTATUS NTAPI DispatchClose	(	IN PSAC_DEVICE_EXTENSION	DeviceExtension,
		IN PIRP	Irp
	)

Definition at line 45 of file dispatch.c.

{
    return STATUS_NOT_IMPLEMENTED;
}

DispatchCreate()

NTSTATUS NTAPI DispatchCreate	(	IN PSAC_DEVICE_EXTENSION	DeviceExtension,
		IN PIRP	Irp
	)

Definition at line 37 of file dispatch.c.

{
    return STATUS_NOT_IMPLEMENTED;
}

DispatchDeviceControl()

NTSTATUS NTAPI DispatchDeviceControl	(	IN PDEVICE_OBJECT	DeviceObject,
		IN PIRP	Irp
	)

Definition at line 21 of file dispatch.c.

{
    return STATUS_NOT_IMPLEMENTED;
}

Referenced by DriverEntry().

DispatchShutdownControl()

NTSTATUS NTAPI DispatchShutdownControl	(	IN PDEVICE_OBJECT	DeviceObject,
		IN PIRP	Irp
	)

Definition at line 29 of file dispatch.c.

{
    return STATUS_NOT_IMPLEMENTED;
}

Referenced by DriverEntry().

TimerDpcRoutine()

VOID NTAPI TimerDpcRoutine	(	IN PKDPC	Dpc,
		IN PVOID	DeferredContext,
		IN PVOID	SystemArgument1,
		IN PVOID	SystemArgument2
	)

Definition at line 61 of file dispatch.c.

{
    HEADLESS_RSP_GET_BYTE ByteValue;
    SIZE_T ValueSize;
    BOOLEAN GotChar;
    NTSTATUS Status;
    PSAC_DEVICE_EXTENSION SacExtension;

    /* Update our counter */
    _InterlockedExchangeAdd(&TimerDpcCount, 1);

    /* Set defaults and loop for new characters */
    GotChar = FALSE;
    ValueSize = sizeof(ByteValue);
    do
    {
        /* Ask the kernel for a byte */
        Status = HeadlessDispatch(HeadlessCmdGetByte,
                                  NULL,
                                  0,
                                  &ByteValue,
                                  &ValueSize);

        /* Break out if there's nothing interesting */
        if (!NT_SUCCESS(Status)) break;
        if (!ByteValue.Value) break;

        /* Update the serial port buffer */
        SerialPortBuffer[SerialPortProducerIndex] = ByteValue.Value;
        GotChar = TRUE;

        /* Update the index, let it roll-over if needed */
        _InterlockedExchange(&SerialPortProducerIndex,
                             (SerialPortProducerIndex + 1) &
                             (SAC_SERIAL_PORT_BUFFER_SIZE - 1));
    } while (ByteValue.Value);

    /* Did we get anything */
    if (GotChar)
    {
        /* Signal the worker thread that there is work to do */
        SacExtension = DeferredContext;
        KeSetEvent(&SacExtension->Event, SacExtension->PriorityBoost, FALSE);
    }
}

Referenced by InitializeDeviceData().

UnloadHandler()

VOID NTAPI UnloadHandler

(

IN PDRIVER_OBJECT

DriverObject

)

Definition at line 112 of file dispatch.c.

{
    PDEVICE_OBJECT DeviceObject, NextDevice;
    SAC_DBG(SAC_DBG_ENTRY_EXIT, "SAC UnloadHandler: Entering.\n");

    /* Go over every device part of the driver */
    DeviceObject = DriverObject->DeviceObject;
    while (DeviceObject)
    {
        /* Free and delete the information about this device */
        NextDevice = DeviceObject->NextDevice;
        FreeDeviceData(DeviceObject);
        IoDeleteDevice(DeviceObject);

        /* Move on to the next one */
        DeviceObject = NextDevice;
    }

    /* Free the driver data and exit */
    FreeGlobalData();
    SAC_DBG(SAC_DBG_ENTRY_EXIT, "SAC UnloadHandler: Exiting.\n");
}

Variable Documentation

TimerDpcCount

LONG TimerDpcCount

Definition at line 15 of file dispatch.c.

Referenced by TimerDpcRoutine().