lookaround/src/main.rs

53 lines
1.1 KiB
Rust
Raw Normal View History

use std::{
env,
net::{
Ipv4Addr,
UdpSocket,
},
str::FromStr,
};
use anyhow::{
self,
Result,
bail,
};
fn main () -> Result <()> {
let mut args = env::args ();
let _exe_name = args.next ();
match args.next ().as_ref ().map (|s| &s[..]) {
None => bail! ("First argument must be a subcommand"),
Some ("client") => client ()?,
Some ("server") => server ()?,
Some (x) => bail! ("Unknown subcommand {}", x),
}
Ok (())
}
fn client () -> Result <()> {
let socket = UdpSocket::bind ("0.0.0.0:9041").unwrap ();
socket.join_multicast_v4 (&(Ipv4Addr::from_str ("225.100.99.98").unwrap ()), &([0u8, 0, 0, 0].into ())).unwrap ();
socket.send_to ("hi there".as_bytes (), ("225.100.99.98", 9040)).unwrap ();
Ok (())
}
fn server () -> Result <()> {
let socket = UdpSocket::bind ("0.0.0.0:9040").unwrap ();
socket.join_multicast_v4 (&(Ipv4Addr::from_str ("225.100.99.98").unwrap ()), &([0u8, 0, 0, 0].into ())).unwrap ();
let mut buf = vec! [0u8; 4096];
let (bytes_recved, remote_addr) = socket.recv_from (&mut buf).unwrap ();
dbg! (bytes_recved, remote_addr);
Ok (())
}