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use clap::Parser;
use embassy_executor::{Executor, Spawner};
use embassy_net::dns::DnsQueryType;
use embassy_net::{Config, Ipv4Address, Ipv4Cidr, Stack, StackResources};
use embassy_net_tuntap::TunTapDevice;
use heapless::Vec;
use log::*;
use rand_core::{OsRng, RngCore};
use static_cell::StaticCell;
#[derive(Parser)]
#[clap(version = "1.0")]
struct Opts {
/// TAP device name
#[clap(long, default_value = "tap0")]
tap: String,
/// use a static IP instead of DHCP
#[clap(long)]
static_ip: bool,
}
#[embassy_executor::task]
async fn net_task(stack: &'static Stack<TunTapDevice>) -> ! {
stack.run().await
}
#[embassy_executor::task]
async fn main_task(spawner: Spawner) {
let opts: Opts = Opts::parse();
// Init network device
let device = TunTapDevice::new(&opts.tap).unwrap();
// Choose between dhcp or static ip
let config = if opts.static_ip {
Config::ipv4_static(embassy_net::StaticConfigV4 {
address: Ipv4Cidr::new(Ipv4Address::new(192, 168, 69, 1), 24),
dns_servers: Vec::from_slice(&[Ipv4Address::new(8, 8, 4, 4).into(), Ipv4Address::new(8, 8, 8, 8).into()])
.unwrap(),
gateway: Some(Ipv4Address::new(192, 168, 69, 100)),
})
} else {
Config::dhcpv4(Default::default())
};
// Generate random seed
let mut seed = [0; 8];
OsRng.fill_bytes(&mut seed);
let seed = u64::from_le_bytes(seed);
// Init network stack
static STACK: StaticCell<Stack<TunTapDevice>> = StaticCell::new();
static RESOURCES: StaticCell<StackResources<3>> = StaticCell::new();
let stack: &Stack<_> = &*STACK.init(Stack::new(
device,
config,
RESOURCES.init(StackResources::<3>::new()),
seed,
));
// Launch network task
spawner.spawn(net_task(stack)).unwrap();
let host = "example.com";
info!("querying host {:?}...", host);
match stack.dns_query(host, DnsQueryType::A).await {
Ok(r) => {
info!("query response: {:?}", r);
}
Err(e) => {
warn!("query error: {:?}", e);
}
};
}
static EXECUTOR: StaticCell<Executor> = StaticCell::new();
fn main() {
env_logger::builder()
.filter_level(log::LevelFilter::Debug)
.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();
});
}
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