/*
File Kmd.cpp
By WzrterFX
*/
#include "Kmd.h"
namespace Kmd {
NTSTATUS Kmd::Create(PDRIVER_OBJECT driverObject) {
NTSTATUS status = STATUS_UNSUCCESSFUL;
UNICODE_STRING
deviceName { };
RtlInitUnicodeString(&
deviceName, L"\\
Device\\Kmd");
status =
IoCreateDevice(
driverObject, NULL, &
deviceName,
FILE_
DEVICE_UNKNOWN, FILE_
DEVICE_SECURE_OPEN, FALSE, &_
deviceObject
);
if (!NT_SUCCESS(status)) {
DbgPrintEx(0, 0,
"Fatal, failed to create driver
device.\n"
);
return status;
}
UNICODE_STRING symbolicLink { };
RtlInitUnicodeString(&symbolicLink, L"\\
Dos
Devices\\Kmd");
status = IoCreateSymbolicLink(&symbolicLink, &
deviceName);
if (!NT_SUCCESS(status)) {
DbgPrintEx(0, 0,
"Fatal, failed to establish driver link.\n"
);
IoDelete
Device(_
deviceObject);
return status;
}
SetFlag(_
deviceObject->Flags,
DO_BUFFERED_IO);
driverObject->MajorFunction[IRP_MJ_CREATE] = [](P
DEVICE_OBJECT, PIRP io) -> NTSTATUS {
IoCompleteRequest(io, IO_NO_INCREMENT);
return io->IoStatus.Status;
};
driverObject->MajorFunction[IRP_MJ_CLOSE] = [](P
DEVICE_OBJECT, PIRP io) -> NTSTATUS {
IoCompleteRequest(io, IO_NO_INCREMENT);
return io->IoStatus.Status;
};
driverObject->MajorFunction[IRP_MJ_
DEVICE_CONTROL] = &this->KmdControl;
ClearFlag(_
deviceObject->Flags,
DO_
DEVICE_
INITIALIZING);
return STATUS_SUCCESS;
}
NTSTATUS Kmd::KmdControl(P
DEVICE_OBJECT, PIRP io) {
NTSTATUS status = STATUS_UNSUCCESSFUL;
PIO_STACK_LOCATION stack = IoGetCurrentIrpStackLocation(io);
if (!stack) {
IoCompleteRequest(io, IO_NO_INCREMENT);
DbgPrintEx(0, 0,
"Fatal, missing driver stack location.\n"
);
return status;
}
PKmdRequest request = reinterpret_cast<PKmdRequest>(io->AssociatedIrp.SystemBuffer);
if (!request) {
IoCompleteRequest(io, IO_NO_INCREMENT);
DbgPrintEx(0, 0,
"Fatal, missing driver associated request.\n"
);
return status;
}
static PEPROCESS process { };
static SIZE_T reserved { };
switch (stack->Parameters.
DeviceIoControl.IoControlCode) {
case ::Kmd::_IoCtls::attach: {
status = ::Kmd::_NtifsApi::PsLookupProcessByProcessId(
request->attachRequest.process, &process
);
break;
}
case ::Kmd::_IoCtls::read: {
if (process) {
status = ::Kmd::_NtifsApi::MmCopyVirtualMemory(
process, request->copyMemoryRequest.from, PsGetCurrentProcess(), request->copyMemoryRequest.to,
request->copyMemoryRequest.requested,
MODE::KernelMode, &reserved
);
}
break;
}
case ::Kmd::_IoCtls::write: {
if (process) {
status = ::Kmd::_NtifsApi::MmCopyVirtualMemory(
PsGetCurrentProcess(), request->copyMemoryRequest.to, process, request->copyMemoryRequest.from,
request->copyMemoryRequest.requested,
MODE::KernelMode, &reserved
);
}
break;
}
default: {
status = STATUS_INVALID_
DEVICE_REQUEST;
break;
}
}
io->IoStatus.Status = status;
io->IoStatus.Information = sizeof(KmdRequest);
IoCompleteRequest(io, IO_NO_INCREMENT);
return status;
}
}帮我全部加上注释
本文解释了在Windows驱动模型(WDM)中DO_DEVICE_INITIALIZING标志的作用及其清除时机。介绍了在设备驱动完成初始化后，为何及如何清除此标志，确保设备能够正常接收I/O请求。
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