Finishing basic implementation

src/main.rs

@@ -0,0 +1,47 @@
+mod listener;
+mod shutdown;
+mod tcp;
+
+use serde::Deserialize;
+use std::fs::File;
+use std::path::Path;
+use tokio::sync::broadcast;
+
+#[derive(Debug, Deserialize)]
+struct Target {
+    source: String,
+    target: String,
+}
+
+#[derive(Debug, Deserialize)]
+struct Config {
+    tcp: Vec<Target>,
+    // udp: Vec<Target>,
+}
+
+#[tokio::main]
+async fn main() {
+    let json_file_path = Path::new("./config.json");
+    let file = File::open(json_file_path).expect("file not found");
+
+    let (notify_shutdown, _) = broadcast::channel(1);
+
+    let config: Config = serde_json::from_reader(file).expect("json parse error");
+    for target in config.tcp {
+        let listener = listener::Listener {
+            shutdown: shutdown::Shutdown::new(notify_shutdown.subscribe()),
+            source: target.source,
+            target: target.target,
+        };
+        tokio::spawn(async move {
+            if let Err(err) = tcp::start_tcp_listener(listener).await {
+                println!("listener error: {}", err);
+            }
+        });
+    }
+
+    // _ = notify_shutdown.send(());
+    loop {
+        tokio::time::sleep(tokio::time::Duration::from_millis(1000 * 1000)).await;
+    }
+}