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#![no_std]
#![feature(lang_items, const_extern_fn)]
#![deny(
warnings,
nonstandard_style,
unused,
future_incompatible,
rust_2018_idioms
)]
#![deny(clippy::all, clippy::nursery, clippy::pedantic)]
use windows_kernel_rs::{
device::{
Completion,
Device,
DeviceDoFlags,
DeviceFlags,
DeviceOperations,
DeviceType,
RequestError,
},
kernel_module,
println,
request::IoControlRequest,
Access,
Driver,
Error,
KernelModule,
RequiredAccess,
SymbolicLink,
};
struct MyDevice {
value: u32,
}
const IOCTL_PRINT_VALUE: u32 = 0x800;
const IOCTL_READ_VALUE: u32 = 0x801;
const IOCTL_WRITE_VALUE: u32 = 0x802;
impl MyDevice {
fn print_value(&mut self, _request: &IoControlRequest) -> Result<u32, Error> {
println!("value: {}", self.value);
Ok(0)
}
fn read_value(&mut self, request: &IoControlRequest) -> Result<u32, Error> {
let mut user_ptr = request.user_ptr();
user_ptr.write(&self.value)?;
Ok(core::mem::size_of::<u32>() as u32)
}
fn write_value(&mut self, request: &IoControlRequest) -> Result<u32, Error> {
let user_ptr = request.user_ptr();
self.value = user_ptr.read()?;
Ok(0)
}
}
impl DeviceOperations for MyDevice {
fn ioctl(
&mut self,
_device: &Device,
request: IoControlRequest,
) -> Result<Completion, RequestError> {
let result = match request.function() {
(_, IOCTL_PRINT_VALUE) => self.print_value(&request),
(RequiredAccess::READ_DATA, IOCTL_READ_VALUE) => self.read_value(&request),
(RequiredAccess::WRITE_DATA, IOCTL_WRITE_VALUE) => self.write_value(&request),
_ => Err(Error::INVALID_PARAMETER),
};
match result {
Ok(size) => Ok(Completion::Complete(size, request.into())),
Err(e) => Err(RequestError(e, request.into())),
}
}
}
struct Module {
_device: Device,
_symbolic_link: SymbolicLink,
}
impl KernelModule for Module {
fn init(mut driver: Driver, _: &str) -> Result<Self, Error> {
let device = driver.create_device(
"\\Device\\Example",
DeviceType::Unknown,
DeviceFlags::SECURE_OPEN,
DeviceDoFlags::DO_BUFFERED_IO,
Access::NonExclusive,
MyDevice {
value: 0
},
)?;
let symbolic_link = SymbolicLink::new("\\??\\Example", "\\Device\\Example")?;
Ok(Module {
_device: device,
_symbolic_link: symbolic_link,
})
}
fn cleanup(&mut self, _driver: Driver) {}
}
kernel_module!(Module);
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