106 lines
2.4 KiB
Rust
106 lines
2.4 KiB
Rust
use crate::prelude::*;
|
|
|
|
struct ServerResponse {
|
|
mac: Option <[u8; 6]>,
|
|
nickname: Option <String>,
|
|
}
|
|
|
|
pub async fn client <I : Iterator <Item=String>> (mut args: I) -> Result <(), AppError> {
|
|
use rand::RngCore;
|
|
|
|
let common_params = app_common::Params::default ();
|
|
let mut bind_addrs = vec! [];
|
|
|
|
while let Some (arg) = args.next () {
|
|
match arg.as_str () {
|
|
"--bind-addr" => {
|
|
bind_addrs.push (match args.next () {
|
|
None => return Err (CliArgError::MissingArgumentValue (arg).into ()),
|
|
Some (x) => Ipv4Addr::from_str (&x)?
|
|
});
|
|
},
|
|
_ => return Err (CliArgError::UnrecognizedArgument (arg).into ()),
|
|
}
|
|
}
|
|
|
|
if bind_addrs.is_empty () {
|
|
bind_addrs = get_ips ()?;
|
|
}
|
|
|
|
let socket = UdpSocket::bind (SocketAddrV4::new (Ipv4Addr::UNSPECIFIED, 0)).await?;
|
|
|
|
for bind_addr in bind_addrs {
|
|
socket.join_multicast_v4 (common_params.multicast_addr, bind_addr)?;
|
|
}
|
|
|
|
let mut idem_id = [0u8; 8];
|
|
rand::thread_rng ().fill_bytes (&mut idem_id);
|
|
|
|
let msg = Message::Request1 {
|
|
idem_id,
|
|
mac: None,
|
|
}.to_vec ()?;
|
|
|
|
for _ in 0..10 {
|
|
socket.send_to (&msg, (common_params.multicast_addr, common_params.server_port)).await?;
|
|
sleep (Duration::from_millis (100)).await;
|
|
}
|
|
|
|
let mut peers = HashMap::with_capacity (10);
|
|
|
|
timeout (Duration::from_secs (2), listen_for_responses (&socket, &mut peers)).await.ok ();
|
|
|
|
let mut peers: Vec <_> = peers.into_iter ().collect ();
|
|
peers.sort_by_key (|(_, v)| v.mac);
|
|
|
|
println! ("Found {} peers:", peers.len ());
|
|
for (ip, resp) in peers.into_iter () {
|
|
let mac = match resp.mac {
|
|
None => {
|
|
println! ("<Unknown> = {}", ip);
|
|
continue;
|
|
},
|
|
Some (x) => x,
|
|
};
|
|
|
|
let nickname = match resp.nickname {
|
|
None => {
|
|
println! ("{} = {}", MacAddress::new (mac), ip.ip ());
|
|
continue;
|
|
},
|
|
Some (x) => x,
|
|
};
|
|
|
|
println! ("{} = {} `{}`", MacAddress::new (mac), ip.ip (), nickname);
|
|
}
|
|
|
|
Ok (())
|
|
}
|
|
|
|
async fn listen_for_responses (
|
|
socket: &UdpSocket,
|
|
peers: &mut HashMap <SocketAddr, ServerResponse>
|
|
) {
|
|
loop {
|
|
let (msgs, remote_addr) = match recv_msg_from (socket).await {
|
|
Err (_) => continue,
|
|
Ok (x) => x,
|
|
};
|
|
|
|
let mut resp = ServerResponse {
|
|
mac: None,
|
|
nickname: None,
|
|
};
|
|
|
|
for msg in msgs.into_iter () {
|
|
match msg {
|
|
Message::Response1 (x) => resp.mac = x,
|
|
Message::Response2 (x) => resp.nickname = Some (x.nickname),
|
|
_ => (),
|
|
}
|
|
}
|
|
|
|
peers.insert (remote_addr, resp);
|
|
}
|
|
}
|