src: add simple broadcast listening logic

src/main.rs

@@ -1,6 +1,7 @@
 use clap::{load_yaml, App};
 use ed25519_dalek::Keypair;
 
+use std::net::UdpSocket;
 use std::path::PathBuf;
 
 mod keypair;
@@ -9,6 +10,28 @@ use keypair::SSBKeypair;
 
 type Config = toml::map::Map<String, toml::Value>;
 
+#[derive(Debug)]
+struct Host {
+    protocol: String,
+    host: String,
+    port: String,
+    pubkey: String,
+}
+
+fn parse_packet(packet: String) -> Host {
+    let mut packet = packet.splitn(4, ':');
+    let protocol = packet.next().unwrap();
+    let host = packet.next().unwrap();
+    let port = packet.next().unwrap().splitn(2, '~').next().unwrap();
+    let pubkey = packet.next().unwrap();
+    Host {
+        protocol: protocol.to_string(),
+        host: host.to_string(),
+        port: port.to_string(),
+        pubkey: pubkey.to_string(),
+    }
+}
+
 fn main() {
     let options = load_yaml!("options.yaml");
     let options = App::from(options).get_matches();
@@ -32,4 +55,11 @@ fn main() {
     };
     let keypair = Keypair::read_or_generate(path.join("secret"));
     println!("{}", keypair.to_json().pretty(2));
+
+    let socket = UdpSocket::bind("0.0.0.0:8008").unwrap();
+    let mut buf = [0; 1024];
+    let (amt, _) = socket.recv_from(&mut buf).unwrap();
+    let buf = &mut buf[..amt];
+    let packet = String::from_utf8(buf.to_vec()).unwrap();
+    println!("{:?}", parse_packet(packet));
 }