314 lines
11 KiB
Rust
314 lines
11 KiB
Rust
//! lesavka-server - **auto-cycle disabled**
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// server/src/main.rs
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#![forbid(unsafe_code)]
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use std::{panic, backtrace::Backtrace, pin::Pin, sync::Arc};
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use std::sync::atomic::AtomicBool;
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use std::time::{Duration, SystemTime, UNIX_EPOCH};
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use anyhow::Context as _;
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use futures_util::{Stream, StreamExt};
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use tokio::{
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fs::{OpenOptions},
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io::AsyncWriteExt,
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sync::Mutex,
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};
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use gstreamer as gst;
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use tokio_stream::wrappers::ReceiverStream;
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use tonic::{Request, Response, Status};
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use tonic::transport::Server;
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use tonic_reflection::server::{Builder as ReflBuilder};
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use tracing::{info, warn, error, trace, debug};
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use tracing_subscriber::{filter::EnvFilter, fmt, prelude::*};
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use tracing_appender::non_blocking::WorkerGuard;
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use lesavka_common::lesavka::{
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Empty, ResetUsbReply,
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relay_server::{Relay, RelayServer},
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KeyboardReport, MouseReport,
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MonitorRequest, VideoPacket, AudioPacket
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};
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use lesavka_server::{gadget::UsbGadget, video, audio, handshake::HandshakeSvc};
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/*──────────────── constants ────────────────*/
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/// **false** = never reset automatically.
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const AUTO_CYCLE: bool = false;
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/*──────────────── logging ───────────────────*/
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fn init_tracing() -> anyhow::Result<WorkerGuard> {
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let file = std::fs::OpenOptions::new()
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.create(true).truncate(true).write(true)
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.open("/tmp/lesavka-server.log")?;
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let (file_writer, guard) = tracing_appender::non_blocking(file);
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let env_filter = EnvFilter::try_from_default_env().unwrap_or_else(|_| {
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EnvFilter::new("lesavka_server=info,lesavka_server::video=warn")
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});
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let filter_str = env_filter.to_string();
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tracing_subscriber::registry()
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.with(env_filter)
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.with(
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fmt::layer()
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.with_target(true)
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.with_thread_ids(true),
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)
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.with(
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fmt::layer()
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.with_writer(file_writer)
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.with_ansi(false)
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.with_target(true)
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.with_level(true),
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)
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.init();
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tracing::info!("📜 effective RUST_LOG = \"{}\"", filter_str);
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Ok(guard)
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}
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/*──────────────── helpers ───────────────────*/
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async fn open_with_retry(path: &str) -> anyhow::Result<tokio::fs::File> {
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for attempt in 1..=200 { // ≈10 s
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match OpenOptions::new()
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.write(true).custom_flags(libc::O_NONBLOCK).open(path).await
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{
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Ok(f) => {
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info!("✅ {path} opened on attempt #{attempt}");
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return Ok(f);
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}
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Err(e) if e.raw_os_error() == Some(libc::EBUSY) => {
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trace!("⏳ {path} busy… retry #{attempt}");
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tokio::time::sleep(Duration::from_millis(50)).await;
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}
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Err(e) => return Err(e).with_context(|| format!("opening {path}")),
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}
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}
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Err(anyhow::anyhow!("timeout waiting for {path}"))
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}
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fn next_minute() -> SystemTime {
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let now = SystemTime::now()
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.duration_since(UNIX_EPOCH).unwrap();
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let secs = now.as_secs();
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let next = (secs / 60 + 1) * 60;
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UNIX_EPOCH + Duration::from_secs(next)
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}
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/*──────────────── Handler ───────────────────*/
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struct Handler {
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kb: Arc<Mutex<tokio::fs::File>>,
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ms: Arc<Mutex<tokio::fs::File>>,
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gadget: UsbGadget,
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did_cycle: AtomicBool,
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}
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impl Handler {
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async fn new(gadget: UsbGadget) -> anyhow::Result<Self> {
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if AUTO_CYCLE {
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info!("🛠️ Initial USB reset…");
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let _ = gadget.cycle(); // ignore failure - may boot without host
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} else {
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info!("🛠️ AUTO_CYCLE disabled - no initial reset");
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}
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info!("🛠️ opening HID endpoints …");
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let kb = open_with_retry("/dev/hidg0").await?;
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let ms = open_with_retry("/dev/hidg1").await?;
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info!("✅ HID endpoints ready");
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Ok(Self {
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kb: Arc::new(Mutex::new(kb)),
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ms: Arc::new(Mutex::new(ms)),
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gadget,
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did_cycle: AtomicBool::new(false),
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})
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}
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}
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/*──────────────── gRPC service ─────────────*/
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#[tonic::async_trait]
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impl Relay for Handler {
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/* existing streams ─ unchanged, except: no more auto-reset */
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type StreamKeyboardStream = ReceiverStream<Result<KeyboardReport, Status>>;
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type StreamMouseStream = ReceiverStream<Result<MouseReport, Status>>;
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type CaptureVideoStream = Pin<Box<dyn Stream<Item=Result<VideoPacket,Status>> + Send>>;
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type CaptureAudioStream = Pin<Box<dyn Stream<Item=Result<AudioPacket,Status>> + Send>>;
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type StreamMicrophoneStream = ReceiverStream<Result<Empty, Status>>;
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type StreamCameraStream = ReceiverStream<Result<Empty, Status>>;
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async fn stream_keyboard(
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&self,
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req: Request<tonic::Streaming<KeyboardReport>>,
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) -> Result<Response<Self::StreamKeyboardStream>, Status> {
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let (tx, rx) = tokio::sync::mpsc::channel(32);
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let kb = self.kb.clone();
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tokio::spawn(async move {
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let mut s = req.into_inner();
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while let Some(pkt) = s.next().await.transpose()? {
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if let Err(e) = kb.lock().await.write_all(&pkt.data).await {
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warn!("⌨️ write failed: {e} (dropped)");
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}
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tx.send(Ok(pkt)).await.ok();
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}
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Ok::<(), Status>(())
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});
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Ok(Response::new(ReceiverStream::new(rx)))
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}
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async fn stream_mouse(
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&self,
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req: Request<tonic::Streaming<MouseReport>>,
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) -> Result<Response<Self::StreamMouseStream>, Status> {
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let (tx, rx) = tokio::sync::mpsc::channel(1024);
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let ms = self.ms.clone();
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tokio::spawn(async move {
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let mut s = req.into_inner();
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while let Some(pkt) = s.next().await.transpose()? {
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if let Err(e) = ms.lock().await.write_all(&pkt.data).await {
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warn!("🖱️ write failed: {e} (dropped)");
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}
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tx.send(Ok(pkt)).await.ok();
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}
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Ok::<(), Status>(())
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});
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Ok(Response::new(ReceiverStream::new(rx)))
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}
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async fn stream_microphone(
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&self,
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req: Request<tonic::Streaming<AudioPacket>>,
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) -> Result<Response<Self::StreamMicrophoneStream>, Status> {
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// 1 ─ build once, early
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let mut sink = audio::Voice::new("hw:UAC2Gadget,0").await
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.map_err(|e| Status::internal(format!("{e:#}")))?;
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// 2 ─ dummy outbound stream (same trick as before)
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let (tx, rx) = tokio::sync::mpsc::channel(1);
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// 3 ─ drive the sink in a background task
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tokio::spawn(async move {
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let mut inbound = req.into_inner();
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static CNT: std::sync::atomic::AtomicU64 =
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std::sync::atomic::AtomicU64::new(0);
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while let Some(pkt) = inbound.next().await.transpose()? {
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let n = CNT.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
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if n < 10 || n % 300 == 0 {
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tracing::trace!("🎤⬇ srv pkt#{n} {} bytes", pkt.data.len());
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}
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sink.push(&pkt);
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}
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sink.finish(); // flush on EOS
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let _ = tx.send(Ok(Empty {})).await;
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Ok::<(), Status>(())
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});
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Ok(Response::new(ReceiverStream::new(rx)))
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}
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async fn stream_camera(
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&self,
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req: Request<tonic::Streaming<VideoPacket>>,
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) -> Result<Response<Self::StreamCameraStream>, Status> {
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// map gRPC camera id → UVC device
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let uvc = std::env::var("LESAVKA_UVC_DEV")
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.unwrap_or_else(|_| "/dev/video4".into());
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// build once
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let relay = video::CameraRelay::new(0, &uvc)
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.map_err(|e| Status::internal(format!("{e:#}")))?;
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// dummy outbound (same pattern as other streams)
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let (tx, rx) = tokio::sync::mpsc::channel(1);
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tokio::spawn(async move {
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let mut s = req.into_inner();
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while let Some(pkt) = s.next().await.transpose()? {
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relay.feed(pkt); // ← all logging inside video.rs
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}
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tx.send(Ok(Empty {})).await.ok();
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Ok::<(), Status>(())
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});
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Ok(Response::new(ReceiverStream::new(rx)))
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}
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async fn capture_video(
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&self,
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req: Request<MonitorRequest>,
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) -> Result<Response<Self::CaptureVideoStream>, Status> {
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let id = req.into_inner().id;
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let dev = match id {
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0 => "/dev/lesavka_l_eye",
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1 => "/dev/lesavka_r_eye",
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_ => return Err(Status::invalid_argument("monitor id must be 0 or 1")),
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};
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debug!("🎥 streaming {dev}");
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let s = video::eye_ball(dev, id, 6_000)
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.await
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.map_err(|e| Status::internal(format!("{e:#}")))?;
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Ok(Response::new(Box::pin(s)))
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}
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async fn capture_audio(
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&self,
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req: Request<MonitorRequest>,
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) -> Result<Response<Self::CaptureAudioStream>, Status> {
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// Only one speaker stream for now; both 0/1 → same ALSA dev.
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let _id = req.into_inner().id;
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// Allow override (`LESAVKA_ALSA_DEV=hw:2,0` for debugging).
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let dev = std::env::var("LESAVKA_ALSA_DEV")
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.unwrap_or_else(|_| "hw:UAC2Gadget,0".into());
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let s = audio::ear(&dev, 0)
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.await
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.map_err(|e| Status::internal(format!("{e:#}")))?;
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Ok(Response::new(Box::pin(s)))
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}
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/*────────────── USB-reset RPC ────────────*/
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async fn reset_usb(
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&self,
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_req: Request<Empty>,
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) -> Result<Response<ResetUsbReply>, Status> {
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info!("🔴 explicit ResetUsb() called");
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match self.gadget.cycle() {
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Ok(_) => Ok(Response::new(ResetUsbReply { ok: true })),
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Err(e) => {
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error!("💥 cycle failed: {e:#}");
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Err(Status::internal(e.to_string()))
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}
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}
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}
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}
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/*──────────────── main ───────────────────────*/
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#[tokio::main(worker_threads = 4)]
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async fn main() -> anyhow::Result<()> {
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let _guard = init_tracing()?;
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panic::set_hook(Box::new(|p| {
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let bt = Backtrace::force_capture();
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error!("💥 panic: {p}\n{bt}");
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}));
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let gadget = UsbGadget::new("lesavka");
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let handler = Handler::new(gadget.clone()).await?;
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info!("🌐 lesavka-server listening on 0.0.0.0:50051");
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Server::builder()
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.tcp_nodelay(true)
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.max_frame_size(Some(2*1024*1024))
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.add_service(RelayServer::new(handler))
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.add_service(HandshakeSvc::server())
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.add_service(ReflBuilder::configure().build_v1().unwrap())
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.serve(([0,0,0,0], 50051).into())
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.await?;
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Ok(())
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}
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