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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)]
extern crate alloc;
use alloc::{vec, vec::Vec};
use windows_kernel_rs::{
device::{
Completion,
Device,
DeviceDoFlags,
DeviceFlags,
DeviceOperations,
DeviceType,
RequestError,
},
kernel_module,
request::{ReadRequest, WriteRequest},
Access,
Driver,
Error,
KernelModule,
SymbolicLink,
};
struct MyDevice {
data: Vec<u8>,
}
impl DeviceOperations for MyDevice {
fn read(&mut self, _device: &Device, request: ReadRequest) -> Result<Completion, RequestError> {
let mut user_ptr = request.user_ptr();
let slice = user_ptr.as_mut_slice();
let offset = (request.offset() as usize).min(self.data.len());
let size = slice.len().min(self.data.len() - offset);
slice[0..size].copy_from_slice(&self.data[offset..offset + size]);
Ok(Completion::Complete(size as u32, request.into()))
}
fn write(&mut self, _device: &Device, request: WriteRequest) -> Result<Completion, RequestError> {
let user_ptr = request.user_ptr();
if request.offset() > 0 {
return Err(RequestError(Error::END_OF_FILE, request.into()))?;
}
let slice = user_ptr.as_slice();
let size = slice.len().min(4096);
self.data = slice[0..size].to_vec();
Ok(Completion::Complete(size as u32, 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 {
data: vec![]
},
)?;
let symbolic_link = SymbolicLink::new("\\??\\Example", "\\Device\\Example")?;
Ok(Module {
_device: device,
_symbolic_link: symbolic_link,
})
}
}
kernel_module!(Module);
|