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#![forbid(missing_docs)]
use std::cell::RefCell;
#[macro_use]
extern crate log;
use std::collections::VecDeque;
#[cfg(target_os = "windows")]
use std::net::TcpStream;
#[cfg(not(target_os = "windows"))]
use std::os::unix::net::UnixStream;
#[cfg(target_os = "windows")]
const WINDOWS_TCP_PORT: u16 = 27015;
mod protocol;
pub use protocol::{
DeviceAttachedInfo, DeviceConnectionType, DeviceEvent, DeviceId, ProductType, ProtocolError,
};
use protocol::{Packet, PacketType, Protocol};
#[derive(thiserror::Error, Debug)]
pub enum Error {
#[error("protocol error: {0}")]
ProtocolError(#[from] protocol::ProtocolError),
#[error("Apple Mobile Device service (usbmuxd) likely not available: {0}")]
ServiceUnavailable(#[from] std::io::Error),
#[error("error registering device listener: code {0}")]
FailedToListen(i64),
#[error("error connecting to device: {0}")]
ConnectionRefused(i64),
}
pub type Result<T> = ::std::result::Result<T, Error>;
#[cfg(target_os = "windows")]
pub type UsbSocket = TcpStream;
#[cfg(not(target_os = "windows"))]
pub type UsbSocket = UnixStream;
#[cfg(not(target_os = "windows"))]
fn connect_unix() -> Result<UsbSocket> {
Ok(UnixStream::connect("/var/run/usbmuxd")?)
}
#[cfg(target_os = "windows")]
fn connect_windows() -> Result<UsbSocket> {
use std::net::{IpAddr, Ipv4Addr, SocketAddr};
let addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), WINDOWS_TCP_PORT);
Ok(TcpStream::connect_timeout(
&addr,
std::time::Duration::from_secs(5),
)?)
}
fn send_payload(
socket: &mut UsbSocket,
packet_type: PacketType,
protocol: Protocol,
payload: Vec<u8>,
) -> Result<()> {
let packet = Packet::new(protocol, packet_type, 0, payload);
Ok(packet.write_into(socket)?)
}
pub fn connect_to_device(device_id: protocol::DeviceId, port: u16) -> Result<UsbSocket> {
#[cfg(target_os = "windows")]
let mut socket = connect_windows()?;
#[cfg(not(target_os = "windows"))]
let mut socket = connect_unix()?;
let command = protocol::Command::connect(port, device_id);
let payload = command.to_bytes();
send_payload(
&mut socket,
PacketType::PlistPayload,
Protocol::Plist,
payload,
)?;
let packet = Packet::from_reader(&mut socket)?;
let cursor = std::io::Cursor::new(&packet.data[..]);
let res = protocol::ResultMessage::from_reader(cursor)?;
if res.0 != 0 {
return Err(Error::ConnectionRefused(res.0));
}
Ok(socket)
}
pub struct DeviceListener {
#[cfg(target_os = "windows")]
socket: RefCell<TcpStream>,
#[cfg(not(target_os = "windows"))]
socket: RefCell<UnixStream>,
events: RefCell<VecDeque<DeviceEvent>>,
}
impl DeviceListener {
pub fn new() -> Result<Self> {
#[cfg(target_os = "windows")]
let socket = connect_windows()?;
#[cfg(not(target_os = "windows"))]
let socket = connect_unix()?;
let listener = DeviceListener {
socket: RefCell::new(socket),
events: RefCell::new(VecDeque::new()),
};
listener.start_listen()?;
listener.socket.borrow_mut().set_nonblocking(true)?;
Ok(listener)
}
pub fn next_event(&self) -> Option<DeviceEvent> {
self.drain_events();
self.events.borrow_mut().pop_front()
}
fn drain_events(&self) {
use std::io::Read;
let mut retries_left = 5;
let mut data: Vec<u8> = Vec::with_capacity(10_000);
let full_data = loop {
let mut buf = [0; 4096];
match (*self.socket.borrow_mut()).read(&mut buf) {
Ok(bytes) => {
data.extend_from_slice(&buf[0..bytes]);
}
Err(e) => {
if e.kind() == std::io::ErrorKind::WouldBlock {
retries_left -= 1;
std::thread::sleep(std::time::Duration::from_millis(100));
}
}
}
if retries_left == 0 {
break data;
}
};
let mut cursor = std::io::Cursor::new(&full_data[..]);
loop {
if cursor.position() == full_data.len() as u64 {
break;
}
match Packet::from_reader(&mut cursor) {
Ok(packet) => {
let msg = DeviceEvent::from_vec(packet.data).unwrap();
self.events.borrow_mut().push_back(msg);
}
Err(ProtocolError::IoError(e)) => match e.kind() {
std::io::ErrorKind::WouldBlock => {
break;
}
_ => {
error!("IO Error: {}", e);
break;
}
},
Err(e) => {
error!("Error receiving events: {}", e);
break;
}
}
}
}
fn start_listen(&self) -> Result<()> {
info!("Starting device listen");
let command = protocol::Command::listen();
let payload = command.to_bytes();
send_payload(
&mut *self.socket.borrow_mut(),
PacketType::PlistPayload,
Protocol::Plist,
payload,
)?;
let packet = Packet::from_reader(&mut *self.socket.borrow_mut())?;
let cursor = std::io::Cursor::new(&packet.data[..]);
let res = protocol::ResultMessage::from_reader(cursor)?;
if res.0 != 0 {
error!("Failed to setup device listen: {}", res.0);
return Err(Error::FailedToListen(res.0));
}
info!("Listen successful");
Ok(())
}
}