discover command for browsing mdns

Cargo.lock

@@ -1147,8 +1147,10 @@ version = "0.2.0"
 dependencies = [
  "clap",
  "env_logger",
+ "futures-util",
  "homekit-controller",
  "log",
+ "mdns",
  "rocket",
  "tokio",
 ]

homekit-exporter/Cargo.toml

@@ -19,3 +19,5 @@ log = "0.4"
 clap = { version = "4.0", features = ["derive"] }
 homekit-controller = { path = "../homekit-controller" }
 rocket = { version = "0.5", features = ["json"] }
+mdns = "3.0.0"
+futures-util = "0.3.30"

homekit-exporter/src/main.rs

@@ -3,7 +3,8 @@ extern crate rocket;
 
 use std::{collections::HashMap, path::PathBuf, time::Duration};
 
-use clap::Parser;
+use clap::{Parser, Subcommand};
+use futures_util::{pin_mut, StreamExt};
 use homekit_controller::{spawn_discover_thread, DeviceConnection, HomekitError, ServiceType};
 use server::launch;
 
@@ -12,12 +13,22 @@ mod server;
 #[derive(Parser, Debug, Clone)]
 #[clap(author, version, about, long_about = None)]
 struct Args {
+    #[command(subcommand)]
+    command: Commands,
     #[clap(long, default_value = "/etc/homekit-exporter/pairing.json")]
     pairing_data: PathBuf,
     #[clap(long, default_value_t = 6666)]
     port: usize,
 }
 
+#[derive(Subcommand, Debug, Clone)]
+enum Commands {
+    /// Run logging server
+    Watch,
+    /// Discover devices
+    Discover,
+}
+
 const SENSORS: [ServiceType; 11] = [
     ServiceType::AirQualitySensor,
     ServiceType::CarbonDioxideSensor,
@@ -36,10 +47,30 @@ const SENSORS: [ServiceType; 11] = [
 async fn rocket() -> rocket::Rocket<rocket::Build> {
     env_logger::init();
     let args = Args::parse();
-    match init(args.pairing_data).await {
+    match args.command {
+        Commands::Watch => match init(args.pairing_data).await {
         Ok(paired) => launch(paired, args.port),
         Err(e) => panic!("Error {e:#?}"),
+        },
+        Commands::Discover => {
+            println!("discovering homekit devices via mdns");
+            match discover().await {
+                Ok(_) => todo!(),
+                Err(_) => todo!(),
             }
+        }
+    }
+}
+
+async fn discover() -> Result<(), mdns::Error> {
+    let stream = mdns::discover::all("_hap._tcp.local", Duration::from_secs(1))?.listen();
+    pin_mut!(stream);
+
+    while let Some(Ok(response)) = stream.next().await {
+        println!("found device:\n\t{response:#?}");
+    }
+
+    Ok(())
 }
 
 async fn init(pairing_data: PathBuf) -> Result<HashMap<String, DeviceConnection>, HomekitError> {