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|
//! Testing against pppd:
//!
//! echo myuser $(hostname) mypass 192.168.7.10 >> /etc/ppp/pap-secrets
//! socat -v -x PTY,link=pty1,rawer PTY,link=pty2,rawer
//! sudo pppd $PWD/pty1 115200 192.168.7.1: ms-dns 8.8.4.4 ms-dns 8.8.8.8 nodetach debug local persist silent noproxyarp
//! RUST_LOG=trace cargo run --bin net_ppp -- --device pty2
//! ping 192.168.7.10
//! nc 192.168.7.10 1234
#![feature(type_alias_impl_trait)]
#![allow(async_fn_in_trait)]
#[path = "../serial_port.rs"]
mod serial_port;
use async_io::Async;
use clap::Parser;
use embassy_executor::{Executor, Spawner};
use embassy_net::tcp::TcpSocket;
use embassy_net::{Config, ConfigV4, Ipv4Address, Ipv4Cidr, Stack, StackResources};
use embassy_net_ppp::Runner;
use embedded_io_async::Write;
use futures::io::BufReader;
use heapless::Vec;
use log::*;
use nix::sys::termios;
use rand_core::{OsRng, RngCore};
use static_cell::{make_static, StaticCell};
use crate::serial_port::SerialPort;
#[derive(Parser)]
#[clap(version = "1.0")]
struct Opts {
/// Serial port device name
#[clap(short, long)]
device: String,
}
#[embassy_executor::task]
async fn net_task(stack: &'static Stack<embassy_net_ppp::Device<'static>>) -> ! {
stack.run().await
}
#[embassy_executor::task]
async fn ppp_task(
stack: &'static Stack<embassy_net_ppp::Device<'static>>,
mut runner: Runner<'static>,
port: SerialPort,
) -> ! {
let port = Async::new(port).unwrap();
let port = BufReader::new(port);
let port = adapter::FromFutures::new(port);
let config = embassy_net_ppp::Config {
username: b"myuser",
password: b"mypass",
};
runner
.run(port, config, |ipv4| {
let Some(addr) = ipv4.address else {
warn!("PPP did not provide an IP address.");
return;
};
let mut dns_servers = Vec::new();
for s in ipv4.dns_servers.iter().flatten() {
let _ = dns_servers.push(Ipv4Address::from_bytes(&s.0));
}
let config = ConfigV4::Static(embassy_net::StaticConfigV4 {
address: Ipv4Cidr::new(Ipv4Address::from_bytes(&addr.0), 0),
gateway: None,
dns_servers,
});
stack.set_config_v4(config);
})
.await
.unwrap();
unreachable!()
}
#[embassy_executor::task]
async fn main_task(spawner: Spawner) {
let opts: Opts = Opts::parse();
// Open serial port
let baudrate = termios::BaudRate::B115200;
let port = SerialPort::new(opts.device.as_str(), baudrate).unwrap();
// Init network device
let state = make_static!(embassy_net_ppp::State::<4, 4>::new());
let (device, runner) = embassy_net_ppp::new(state);
// Generate random seed
let mut seed = [0; 8];
OsRng.fill_bytes(&mut seed);
let seed = u64::from_le_bytes(seed);
// Init network stack
let stack = &*make_static!(Stack::new(
device,
Config::default(), // don't configure IP yet
make_static!(StackResources::<3>::new()),
seed
));
// Launch network task
spawner.spawn(net_task(stack)).unwrap();
spawner.spawn(ppp_task(stack, runner, port)).unwrap();
// Then we can use it!
let mut rx_buffer = [0; 4096];
let mut tx_buffer = [0; 4096];
let mut buf = [0; 4096];
loop {
let mut socket = TcpSocket::new(stack, &mut rx_buffer, &mut tx_buffer);
socket.set_timeout(Some(embassy_time::Duration::from_secs(10)));
info!("Listening on TCP:1234...");
if let Err(e) = socket.accept(1234).await {
warn!("accept error: {:?}", e);
continue;
}
info!("Received connection from {:?}", socket.remote_endpoint());
loop {
let n = match socket.read(&mut buf).await {
Ok(0) => {
warn!("read EOF");
break;
}
Ok(n) => n,
Err(e) => {
warn!("read error: {:?}", e);
break;
}
};
info!("rxd {:02x?}", &buf[..n]);
match socket.write_all(&buf[..n]).await {
Ok(()) => {}
Err(e) => {
warn!("write error: {:?}", e);
break;
}
};
}
}
}
static EXECUTOR: StaticCell<Executor> = StaticCell::new();
fn main() {
env_logger::builder()
.filter_level(log::LevelFilter::Trace)
.filter_module("polling", log::LevelFilter::Info)
.filter_module("async_io", log::LevelFilter::Info)
.format_timestamp_nanos()
.init();
let executor = EXECUTOR.init(Executor::new());
executor.run(|spawner| {
spawner.spawn(main_task(spawner)).unwrap();
});
}
mod adapter {
use core::future::poll_fn;
use core::pin::Pin;
use futures::AsyncBufReadExt;
/// Adapter from `futures::io` traits.
#[derive(Clone)]
pub struct FromFutures<T: ?Sized> {
inner: T,
}
impl<T> FromFutures<T> {
/// Create a new adapter.
pub fn new(inner: T) -> Self {
Self { inner }
}
}
impl<T: ?Sized> embedded_io_async::ErrorType for FromFutures<T> {
type Error = std::io::Error;
}
impl<T: futures::io::AsyncRead + Unpin + ?Sized> embedded_io_async::Read for FromFutures<T> {
async fn read(&mut self, buf: &mut [u8]) -> Result<usize, Self::Error> {
poll_fn(|cx| Pin::new(&mut self.inner).poll_read(cx, buf)).await
}
}
impl<T: futures::io::AsyncBufRead + Unpin + ?Sized> embedded_io_async::BufRead for FromFutures<T> {
async fn fill_buf(&mut self) -> Result<&[u8], Self::Error> {
self.inner.fill_buf().await
}
fn consume(&mut self, amt: usize) {
Pin::new(&mut self.inner).consume(amt)
}
}
impl<T: futures::io::AsyncWrite + Unpin + ?Sized> embedded_io_async::Write for FromFutures<T> {
async fn write(&mut self, buf: &[u8]) -> Result<usize, Self::Error> {
poll_fn(|cx| Pin::new(&mut self.inner).poll_write(cx, buf)).await
}
async fn flush(&mut self) -> Result<(), Self::Error> {
poll_fn(|cx| Pin::new(&mut self.inner).poll_flush(cx)).await
}
}
}
|
