Initial implementation of Wayland AirPlay desktop sharing

examples/pair.rs

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+//! Interactive pairing smoke test, sharing the GUI's exact protocol implementation.
+use airplay_discovery::{Discovery, ServiceBrowser};
+use anyhow::Context;
+use spielab::pairing::{ControlSession, CredentialStore};
+use std::{
+    io::{self, Write},
+    path::PathBuf,
+    time::Duration,
+};
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    let name = std::env::args()
+        .nth(1)
+        .context("Usage: cargo run --example pair -- 'Receiver name'")?;
+    let state = std::env::var_os("SPIELAB_STATE_DIR")
+        .map(PathBuf::from)
+        .context("Set SPIELAB_STATE_DIR to the same credential directory as the GUI")?;
+    let store = CredentialStore::new(state)?;
+    let browser = ServiceBrowser::new()?;
+    let device = browser
+        .scan(Duration::from_secs(5))
+        .await?
+        .into_iter()
+        .find(|device| device.name == name)
+        .context("Receiver not found")?;
+    let mut session = ControlSession::open(device).await?;
+    if let Some(credentials) = store.load(&session.device)? {
+        session.verify(&credentials).await?;
+    } else {
+        session.request_pin().await?;
+        print!("Enter the code shown on Apple TV: ");
+        io::stdout().flush()?;
+        let mut pin = String::new();
+        io::stdin().read_line(&mut pin)?;
+        let credentials = session.pair(pin.trim()).await?;
+        store.save(&session.device, &credentials)?;
+    }
+    println!("Authenticated: encrypted OPTIONS round trip succeeded.");
+    session.transport.close().await?;
+    Ok(())
+}