Merge pull request 'Peer discovery broadcast' (#5) from mirsal/cosmoline:broadcast into main

Reviewed-on: #5

src/main.rs

@@ -1,17 +1,48 @@
-use async_std::fs;
+use async_std::{fs, task};
 use async_std::net::UdpSocket;
 use async_std::path::PathBuf;
+use async_std::sync::Arc;
 use clap::{load_yaml, App};
 use ed25519_dalek::Keypair;
 
 mod keypair;
-use keypair::SSBKeypair;
+use keypair::{SSBKeypair, SSBPublicKey};
 
 mod network;
 use network::Peer;
 
 type Config = toml::map::Map<String, toml::Value>;
 
+async fn peer_discovery_recv() {
+    let socket = UdpSocket::bind(":::8008").await.unwrap();
+    let mut buf = [0u8; 1024];
+
+    loop {
+        let (amt, peer) = socket.recv_from(&mut buf).await.unwrap();
+        let buf = &mut buf[..amt];
+        let packet = String::from_utf8(buf.to_vec()).unwrap();
+        println!(
+            "{} {}",
+            peer,
+            Peer::from_discovery_packet(&packet).to_discovery_packet()
+        );
+    }
+}
+
+async fn peer_discovery_send(pubkey: Arc<String>) {
+    let socket = UdpSocket::bind(":::0").await.unwrap();
+    let msg = format!("net:1.2.3.4:8023~shs:{}", &pubkey);
+    let buf = msg.as_bytes();
+
+    socket.set_broadcast(true).unwrap();
+
+    loop {
+        println!("Sending packet: {:?}", &msg);
+        socket.send_to(&buf, "255.255.255.255:8008").await.unwrap();
+        task::sleep(std::time::Duration::from_secs(1)).await;
+    }
+}
+
 #[async_std::main]
 async fn main() {
     let options = load_yaml!("options.yaml");
@@ -39,17 +70,8 @@ async fn main() {
     let keypair = Keypair::read_or_generate(path.join("secret")).await;
     println!("{}", keypair.to_json().pretty(2));
 
-    let socket = UdpSocket::bind("0.0.0.0:8008").await.unwrap();
-    let mut buf = [0u8; 1024];
+    let pubkey = keypair.public.to_base64();
 
-    loop {
-        let (amt, peer) = socket.recv_from(&mut buf).await.unwrap();
-        let buf = &mut buf[..amt];
-        let packet = String::from_utf8(buf.to_vec()).unwrap();
-        println!(
-            "{} {}",
-            peer,
-            Peer::from_discovery_packet(&packet).to_discovery_packet()
-        );
-    }
+    task::spawn(peer_discovery_recv());
+    task::spawn(peer_discovery_send(Arc::new(pubkey))).await;
 }