问题描述
我正在尝试为此执行 IOCTL_BTH_GET_DEVICE_INFO,作为初学者,我编写了以下代码
#include <ntddk.h>
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <ntddk.h>
#include <wdf.h>
#include <initguid.h>
#include <ntstrsafe.h>
#include <bthdef.h>
#include <ntintsafe.h>
#include <bthguid.h>
#include <bthioctl.h>
#include <sdpnode.h>
#include <bthddi.h>
#include <bthsdpddi.h>
#include <bthsdpdef.h>
#include <wdfobject.h>
#include <wdfdriver.h>
#include <wdm.h>
DRIVER_INITIALIZE DriverEntry;
EVT_WDF_DRIVER_DEVICE_ADD KmdfHelloWorldEvtDeviceAdd;
UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Device\\MyDeivce123");
PDEVICE_OBJECT DeviceObject = NULL;
UNICODE_STRING SymLinkName = RTL_CONSTANT_STRING(L"\\??\mydevicelink123");
NTSTATUS BleDispatchCreate(PDEVICE_OBJECT device_obj,PIRP Irp)
{
KdPrint((" Inside BleDispatchCreate "));
KdPrint((" BleDispatchCreate Execution complete"));
//need to return status
return STATUS_SUCCESS;
}
NTSTATUS BleDispatchDeviceControl(PDEVICE_OBJECT device_obj,PIRP Irp)
{
KdPrint((" Inside BleDispatchDeviceControl "));
KdPrint((" BleDispatchDeviceControl Execution complete"));
//need to return status
return STATUS_SUCCESS;
}
//removed Unload function
NTSTATUS BleTest(PDEVICE_OBJECT device_obj,PIRP Irp)
{
PBTH_DEVICE_INFO_LIST PBLRI = (PBTH_DEVICE_INFO_LIST)Irp- >AssociatedIrp.SystemBuffer;
NTSTATUS status = STATUS_SUCCESS;
PIO_STACK_LOCATION irp_sl = IoGetCurrentIrpStackLocation(Irp);
KdPrint(("Number of devices are before i/ocall %lu",PBLRI->numOfDevices));
status = IoCallDriver(device_obj,Irp);
if (status == STATUS_SUCCESS) {
KdPrint(("IOCALLDRIVER SUCCESS : \n "));
KdPrint(("Number of devices are %lu",PBLRI->numOfDevices));
}
else {
KdPrint(("Driver call Failed!\r\n"));
return status;
}
return status;
}
NTSTATUS DriverEntry(_In_ PDRIVER_OBJECT DriverObject,_In_ PUNICODE_STRING
RegistryPath) {
NTSTATUS status = STATUS_SUCCESS;
int i;
DriverObject->DriverUnload = Unload;
status = IoCreateDevice(DriverObject,&DeviceName,FILE_DEVICE_BLUETOOTH,FILE_CHARACTERISTIC_PNP_DEVICE,FALSE,&DeviceObject);
if (!NT_SUCCESS(status)){
KdPrint(("creating device failed \n "));
return status;
}else
KdPrint(("Device creation successful\r\n"));
status = IoCreateSymbolicLink(&SymLinkName,&DeviceName);
if (!NT_SUCCESS(status)){
KdPrint(("creating symbolic link failed \n"));
IoDeleteDevice(DeviceObject);
return status;
}else
KdPrint(("Symbolic link creation successful\r\n"));
DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] =
BleDispatchDeviceControl;
/********fill IRP *****************************/
PIRP Irp = NULL;
ULONG IoControlCode = IOCTL_BTH_GET_DEVICE_INFO;
ULONG InputBufferLength = sizeof(BTH_DEVICE_INFO_LIST);
BTH_DEVICE_INFO_LIST InputBuffer;
ULONG OutputBufferLength = sizeof(BTH_DEVICE_INFO_LIST);
BTH_DEVICE_INFO_LIST OutputBuffer;
BOOLEAN InternalDeviceIoControl = FALSE;
PKEVENT Event = NULL;
IO_STATUS_BLOCK ISB;
PIO_STATUS_BLOCK IoStatusBlock = &ISB;
Irp = IoBuildDeviceIoControlRequest(IoControlCode,DeviceObject,&InputBuffer,InputBufferLength,&OutputBuffer,OutputBufferLength,InternalDeviceIoControl,Event,IoStatusBlock);
/* IO_COMPLETION_ROUTINE CdDevCtrlCompletionRoutine;
NTSTATUS
CdDevCtrlCompletionRoutine(
_In_ PDEVICE_OBJECT DeviceObject,_In_ PIRP Irp,_In_reads_opt_(_Inexpressible_("varies")) PVOID Contxt
);*/
BleTest(DeviceObject,Irp);
KdPrint(("Driver LOAD ENDS returning success \n "));
return status;
}
输出日志文件是
- 设备创建成功
- 符号链接创建成功
- I/O 调用前的设备数量 1313444832
- BleDispatchDeviceControl 内部
- BleDispatchDeviceControl 执行完成
- IOCALLDRIVER 成功:
- 设备数量为 1313444832
- 驱动程序加载结束返回成功
- 驱动卸载调用
在我看来它打印了一些垃圾值。请指出我在 init 中犯的错误?我是这个领域的初学者。如果这个帖子不清楚,请指出我。我会尽量使它更简洁。
解决方法
您提供的代码不完整,DeviceObject
、OutputBufferLength
和 device_obj
未定义。所以我没有办法测试它,我会告诉你我目前看到的问题,但如果他们无法修复错误,请Minimal Reproducible Example。
-
InputBuffer
或OutputBuffer
目前表示一个包含sizeof(BTH_DEVICE_INFO_LIST)
元素的数组,元素类型为PVOID
,这显然是错误的。它们应该是BTH_DEVICE_INFO_LIST Input; BTH_DEVICE_INFO_LIST Output;
,然后以这种方式使用它们&Input
&Output
。但是这个问题应该不会影响结果,只会占用更多的栈空间,没有意义。 -
\InternalDeviceIoControl
我不确定这里的“\”是什么意思。 -
Irp 可能是异步的,根据 the MSDN description,如果您将
NULL
传递给Event
参数,您必须提供一个IoCompletion
例程。 -
MSDN 没有说
IoStatusBlock
参数允许NULL
,所以请始终传递一个指向IO_STATUS_BLOCK
类型变量的指针。 -
IoCallDriver
的返回值是多少?STATUS_PENDING
还是别的什么? -
将
(*PBLRI).numOfDevices
改为PBLRI->numOfDevices
会更好。
您面临的错误很可能是由于第 3 点造成的,因此请考虑提供一个 IoCompletion
例程或传递一个已初始化的 KEVENT
变量,然后等待 Irp 完成。