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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
extern crate libc;
use std::ffi::{CString, OsString};
use std::io;
use std::io::{Read, Write};
use std::os::unix::prelude::*;
use crate::consts::CID_BROADCAST;
use crate::platform::{hidraw, monitor};
use crate::u2ftypes::{U2FDevice, U2FDeviceInfo};
use crate::util::from_unix_result;
#[derive(Debug)]
pub struct Device {
path: OsString,
fd: libc::c_int,
in_rpt_size: usize,
out_rpt_size: usize,
cid: [u8; 4],
dev_info: Option<U2FDeviceInfo>,
}
impl Device {
pub fn new(path: OsString) -> io::Result<Self> {
let cstr = CString::new(path.as_bytes())?;
let fd = unsafe { libc::open(cstr.as_ptr(), libc::O_RDWR) };
let fd = from_unix_result(fd)?;
let (in_rpt_size, out_rpt_size) = hidraw::read_hid_rpt_sizes_or_defaults(fd);
Ok(Self {
path,
fd,
in_rpt_size,
out_rpt_size,
cid: CID_BROADCAST,
dev_info: None,
})
}
pub fn is_u2f(&self) -> bool {
hidraw::is_u2f_device(self.fd)
}
}
impl Drop for Device {
fn drop(&mut self) {
// Close the fd, ignore any errors.
let _ = unsafe { libc::close(self.fd) };
}
}
impl PartialEq for Device {
fn eq(&self, other: &Device) -> bool {
self.path == other.path
}
}
impl Read for Device {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
let bufp = buf.as_mut_ptr() as *mut libc::c_void;
let rv = unsafe { libc::read(self.fd, bufp, buf.len()) };
from_unix_result(rv as usize)
}
}
impl Write for Device {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
let bufp = buf.as_ptr() as *const libc::c_void;
let rv = unsafe { libc::write(self.fd, bufp, buf.len()) };
from_unix_result(rv as usize)
}
// USB HID writes don't buffer, so this will be a nop.
fn flush(&mut self) -> io::Result<()> {
Ok(())
}
}
impl U2FDevice for Device {
fn get_cid(&self) -> &[u8; 4] {
&self.cid
}
fn set_cid(&mut self, cid: [u8; 4]) {
self.cid = cid;
}
fn in_rpt_size(&self) -> usize {
self.in_rpt_size
}
fn out_rpt_size(&self) -> usize {
self.out_rpt_size
}
fn get_property(&self, prop_name: &str) -> io::Result<String> {
monitor::get_property_linux(&self.path, prop_name)
}
fn get_device_info(&self) -> U2FDeviceInfo {
// unwrap is okay, as dev_info must have already been set, else
// a programmer error
self.dev_info.clone().unwrap()
}
fn set_device_info(&mut self, dev_info: U2FDeviceInfo) {
self.dev_info = Some(dev_info);
}
}
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