feat: phase 7 — proxy daemon with HTTP login and WebSocket bridge

ericrfb-proxy axum server with three endpoints:

POST /api/login:
- Proxies credentials to OmniView auth.asp
- Extracts session cookie, fetches title_app.asp
- Returns JSON with applet_id, port, protocol_version, board_name

GET /api/ws?applet_id=...&port=...:
- WebSocket upgrade, connects to OmniView via e-RIC RFB
- Bidirectional pump: OmniView frames → RGBA blits over WS,
  browser input events → key/mouse/hotkey to OmniView
- Binary protocol: TAG_BLIT(0x01), TAG_RESIZE(0x03) server→client;
  TAG_KEY_PRESS(0x10), TAG_KEY_RELEASE(0x11), TAG_POINTER(0x12),
  TAG_CTRL_ALT_DEL(0x13) client→server

Static file fallback via tower-http ServeDir.

Config via config.toml or BLEKIN_HOST env var.

Tested against real OmniView:
- Login endpoint returns valid APPLET_ID
- WebSocket upgrade succeeds (HTTP 101)
- Session connects and pumps frames

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

crates/ericrfb-proxy/Cargo.toml

@@ -5,8 +5,13 @@ edition = "2024"
 
 [dependencies]
 ericrfb = { path = "../ericrfb" }
+futures-util = "0.3"
 tokio.workspace = true
 axum.workspace = true
+reqwest.workspace = true
+serde.workspace = true
+toml.workspace = true
+tower-http.workspace = true
 tracing.workspace = true
 tracing-subscriber.workspace = true
 anyhow.workspace = true

crates/ericrfb-proxy/src/config.rs

@@ -0,0 +1,64 @@
+use serde::Deserialize;
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct ProxyConfig {
+    /// Address to bind the proxy HTTP server to.
+    #[serde(default = "default_bind")]
+    pub bind: String,
+
+    /// Directory to serve static frontend files from.
+    #[serde(default = "default_static_dir")]
+    pub static_dir: String,
+
+    pub omniview: OmniviewConfig,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct OmniviewConfig {
+    pub host: String,
+
+    /// HTTP port for login/applet page (usually 80).
+    #[serde(default = "default_http_port")]
+    pub http_port: u16,
+
+    /// TCP port for e-RIC RFB protocol (usually 443).
+    #[serde(default = "default_rfb_port")]
+    pub rfb_port: u16,
+}
+
+fn default_bind() -> String {
+    "0.0.0.0:3000".into()
+}
+
+fn default_static_dir() -> String {
+    "dist".into()
+}
+
+fn default_http_port() -> u16 {
+    80
+}
+
+fn default_rfb_port() -> u16 {
+    443
+}
+
+pub fn load() -> anyhow::Result<ProxyConfig> {
+    let path = std::env::var("BLEKIN_CONFIG").unwrap_or_else(|_| "config.toml".into());
+    match std::fs::read_to_string(&path) {
+        Ok(contents) => Ok(toml::from_str(&contents)?),
+        Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
+            tracing::warn!("no config file at {path}, using defaults + BLEKIN_HOST env");
+            let host = std::env::var("BLEKIN_HOST").unwrap_or_else(|_| "10.3.0.130".into());
+            Ok(ProxyConfig {
+                bind: default_bind(),
+                static_dir: default_static_dir(),
+                omniview: OmniviewConfig {
+                    host,
+                    http_port: default_http_port(),
+                    rfb_port: default_rfb_port(),
+                },
+            })
+        }
+        Err(e) => Err(e.into()),
+    }
+}

crates/ericrfb-proxy/src/login.rs

@@ -0,0 +1,116 @@
+use axum::Json;
+use axum::extract::State;
+use axum::http::StatusCode;
+use serde::{Deserialize, Serialize};
+
+use crate::AppState;
+
+#[derive(Deserialize)]
+pub struct LoginRequest {
+    pub username: String,
+    pub password: String,
+}
+
+#[derive(Serialize)]
+pub struct LoginResponse {
+    pub applet_id: String,
+    pub port: u16,
+    pub protocol_version: String,
+    pub board_name: String,
+}
+
+#[derive(Serialize)]
+pub struct ErrorResponse {
+    pub error: String,
+}
+
+pub async fn handle_login(
+    State(state): State<AppState>,
+    Json(req): Json<LoginRequest>,
+) -> Result<Json<LoginResponse>, (StatusCode, Json<ErrorResponse>)> {
+    let cfg = &state.config.omniview;
+    let base = format!("http://{}:{}", cfg.host, cfg.http_port);
+
+    // POST credentials to auth.asp
+    let auth_resp = state
+        .http_client
+        .post(format!("{base}/auth.asp"))
+        .form(&[
+            ("login", req.username.as_str()),
+            ("password", req.password.as_str()),
+            ("action_login.x", "0"),
+            ("action_login.y", "0"),
+        ])
+        .send()
+        .await
+        .map_err(|e| auth_err(format!("connect failed: {e}")))?;
+
+    // Extract session cookie
+    let cookie = auth_resp
+        .headers()
+        .get("set-cookie")
+        .and_then(|v| v.to_str().ok())
+        .and_then(|s| s.split(';').next())
+        .ok_or_else(|| auth_err("no session cookie in response"))?
+        .to_string();
+
+    // Check redirect — should go to home.asp on success
+    let location = auth_resp
+        .headers()
+        .get("location")
+        .and_then(|v| v.to_str().ok())
+        .unwrap_or("");
+    if !location.contains("home.asp") {
+        return Err(auth_err("authentication failed"));
+    }
+
+    // Fetch the applet page to extract params
+    let applet_resp = state
+        .http_client
+        .get(format!("{base}/title_app.asp"))
+        .header("cookie", &cookie)
+        .send()
+        .await
+        .map_err(|e| auth_err(format!("failed to fetch applet page: {e}")))?;
+
+    let html = applet_resp
+        .text()
+        .await
+        .map_err(|e| auth_err(format!("failed to read applet page: {e}")))?;
+
+    let applet_id = extract_param(&html, "APPLET_ID")
+        .ok_or_else(|| auth_err("APPLET_ID not found in applet page"))?;
+    let port = extract_param(&html, "PORT")
+        .and_then(|s| s.parse().ok())
+        .unwrap_or(cfg.rfb_port);
+    let protocol_version =
+        extract_param(&html, "PROTOCOL_VERSION").unwrap_or_else(|| "01.11".into());
+    let board_name =
+        extract_param(&html, "BOARD_NAME").unwrap_or_else(|| "Remote IP Manager".into());
+
+    tracing::info!(
+        "login successful: board={board_name}, applet_id={}...",
+        &applet_id[..applet_id.len().min(16)]
+    );
+
+    Ok(Json(LoginResponse {
+        applet_id,
+        port,
+        protocol_version,
+        board_name,
+    }))
+}
+
+fn extract_param(html: &str, name: &str) -> Option<String> {
+    let needle = format!("{name}\" value=\"");
+    let start = html.find(&needle)? + needle.len();
+    let end = html[start..].find('"')? + start;
+    Some(html[start..end].to_string())
+}
+
+fn auth_err(msg: impl Into<String>) -> (StatusCode, Json<ErrorResponse>) {
+    (
+        StatusCode::UNAUTHORIZED,
+        Json(ErrorResponse { error: msg.into() }),
+    )
+}

crates/ericrfb-proxy/src/main.rs

@@ -1,3 +1,52 @@
-fn main() {
-    println!("Hello, world!");
+mod config;
+mod login;
+mod ws;
+
+use std::sync::Arc;
+
+use axum::Router;
+use axum::routing::{get, post};
+use tokio::net::TcpListener;
+use tower_http::services::ServeDir;
+use tracing_subscriber::EnvFilter;
+
+#[derive(Clone)]
+pub struct AppState {
+    pub config: Arc<config::ProxyConfig>,
+    pub http_client: reqwest::Client,
+}
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    tracing_subscriber::fmt()
+        .with_env_filter(EnvFilter::from_default_env())
+        .init();
+
+    let cfg = config::load()?;
+    tracing::info!(
+        "blekin proxy starting — OmniView at {}:{}, binding to {}",
+        cfg.omniview.host,
+        cfg.omniview.http_port,
+        cfg.bind
+    );
+
+    let state = AppState {
+        config: Arc::new(cfg.clone()),
+        http_client: reqwest::Client::builder()
+            .danger_accept_invalid_certs(true)
+            .redirect(reqwest::redirect::Policy::none())
+            .build()?,
+    };
+
+    let app = Router::new()
+        .route("/api/login", post(login::handle_login))
+        .route("/api/ws", get(ws::handle_ws))
+        .fallback_service(ServeDir::new(&cfg.static_dir))
+        .with_state(state);
+
+    let listener = TcpListener::bind(&cfg.bind).await?;
+    tracing::info!("listening on {}", cfg.bind);
+    axum::serve(listener, app).await?;
+
+    Ok(())
 }

crates/ericrfb-proxy/src/ws.rs

@@ -0,0 +1,256 @@
+use axum::extract::ws::{Message, WebSocket};
+use axum::extract::{Query, State, WebSocketUpgrade};
+use axum::response::IntoResponse;
+use futures_util::{SinkExt, StreamExt};
+use serde::Deserialize;
+use tokio::sync::mpsc;
+
+use ericrfb::framebuffer::Framebuffer;
+use ericrfb::handshake::Config;
+use ericrfb::input;
+use ericrfb::msg;
+use ericrfb::proto::RGB332_LUT;
+use ericrfb::session::{ActiveSession, Event};
+
+use crate::AppState;
+
+// ---------------------------------------------------------------------------
+// WS binary protocol tags
+// ---------------------------------------------------------------------------
+
+// Proxy → Browser
+const TAG_BLIT: u8 = 0x01;
+const TAG_RESIZE: u8 = 0x03;
+
+// Browser → Proxy
+const TAG_KEY_PRESS: u8 = 0x10;
+const TAG_KEY_RELEASE: u8 = 0x11;
+const TAG_POINTER: u8 = 0x12;
+const TAG_CTRL_ALT_DEL: u8 = 0x13;
+
+#[derive(Deserialize)]
+pub struct WsQuery {
+    pub applet_id: String,
+    #[serde(default = "default_port")]
+    pub port: u16,
+}
+
+fn default_port() -> u16 {
+    443
+}
+
+pub async fn handle_ws(
+    ws: WebSocketUpgrade,
+    State(state): State<AppState>,
+    Query(query): Query<WsQuery>,
+) -> impl IntoResponse {
+    ws.on_upgrade(move |socket| run_session(socket, state, query))
+}
+
+async fn run_session(socket: WebSocket, state: AppState, query: WsQuery) {
+    let cfg = Config::new(&state.config.omniview.host, query.port, &query.applet_id);
+
+    tracing::info!(
+        "WS session starting: {}:{}",
+        state.config.omniview.host,
+        query.port
+    );
+
+    // Connect to OmniView in a blocking task (handshake is sync IO)
+    let session = match tokio::task::spawn_blocking(move || {
+        ActiveSession::connect(&cfg, &[7, 5, 1, 0, -250])
+    })
+    .await
+    {
+        Ok(Ok(s)) => s,
+        Ok(Err(e)) => {
+            tracing::error!("OmniView connect failed: {e}");
+            return;
+        }
+        Err(e) => {
+            tracing::error!("spawn_blocking panicked: {e}");
+            return;
+        }
+    };
+
+    tracing::info!(
+        "Connected to OmniView: {}x{}",
+        session.framebuffer.width,
+        session.framebuffer.height
+    );
+
+    let (ws_tx, ws_rx) = socket.split();
+    let (blit_tx, blit_rx) = mpsc::channel::<Message>(64);
+
+    // Channel for input events from browser → OmniView writer
+    let (input_tx, input_rx) = mpsc::channel::<InputEvent>(64);
+
+    // Task: forward blit messages to WebSocket
+    let ws_send_task = tokio::spawn(forward_ws_send(ws_tx, blit_rx));
+
+    // Task: receive input from WebSocket
+    let ws_recv_task = tokio::spawn(forward_ws_recv(ws_rx, input_tx));
+
+    // Task: OmniView session pump (blocking)
+    let pump_task = tokio::task::spawn_blocking(move || run_pump(session, blit_tx, input_rx));
+
+    // Wait for any task to finish (on error or disconnect)
+    tokio::select! {
+        r = ws_send_task => { tracing::debug!("ws_send finished: {r:?}"); }
+        r = ws_recv_task => { tracing::debug!("ws_recv finished: {r:?}"); }
+        r = pump_task => { tracing::debug!("pump finished: {r:?}"); }
+    }
+
+    tracing::info!("WS session ended");
+}
+
+// ---------------------------------------------------------------------------
+// OmniView pump (runs on blocking thread)
+// ---------------------------------------------------------------------------
+
+enum InputEvent {
+    KeyPress(u8),
+    KeyRelease(u8),
+    Pointer { x: u16, y: u16, mask: u8 },
+    CtrlAltDel,
+}
+
+fn run_pump(
+    mut session: ActiveSession,
+    blit_tx: mpsc::Sender<Message>,
+    mut input_rx: mpsc::Receiver<InputEvent>,
+) {
+    // Send initial resize message
+    let w = session.framebuffer.width;
+    let h = session.framebuffer.height;
+    let _ = blit_tx.blocking_send(make_resize_msg(w, h));
+
+    loop {
+        // Drain any pending input events
+        while let Ok(evt) = input_rx.try_recv() {
+            if let Err(e) = handle_input(&mut session, evt) {
+                tracing::error!("input error: {e}");
+                return;
+            }
+        }
+
+        // Process one server message
+        match session.process_one() {
+            Ok(Some(Event::FramebufferDirty)) => {
+                // Send full framebuffer as RGBA blit
+                let msg = make_full_blit(&session.framebuffer);
+                if blit_tx.blocking_send(msg).is_err() {
+                    return; // WS closed
+                }
+                // Request next update
+                if let Err(e) = session.request_update() {
+                    tracing::error!("request_update error: {e}");
+                    return;
+                }
+            }
+            Ok(Some(Event::Resize { width, height })) => {
+                let _ = blit_tx.blocking_send(make_resize_msg(width, height));
+            }
+            Ok(_) => {}
+            Err(e) => {
+                tracing::error!("session error: {e}");
+                return;
+            }
+        }
+    }
+}
+
+fn handle_input(session: &mut ActiveSession, evt: InputEvent) -> Result<(), String> {
+    match evt {
+        InputEvent::KeyPress(sc) => {
+            input::write_key_press(&mut session.writer, sc).map_err(|e| e.to_string())
+        }
+        InputEvent::KeyRelease(sc) => {
+            input::write_key_release(&mut session.writer, sc).map_err(|e| e.to_string())
+        }
+        InputEvent::Pointer { x, y, mask } => {
+            msg::write_pointer_event(&mut session.writer, x, y, mask).map_err(|e| e.to_string())
+        }
+        InputEvent::CtrlAltDel => {
+            input::write_ctrl_alt_del(&mut session.writer).map_err(|e| e.to_string())
+        }
+    }
+}
+
+// ---------------------------------------------------------------------------
+// Binary message builders
+// ---------------------------------------------------------------------------
+
+fn make_full_blit(fb: &Framebuffer) -> Message {
+    let w = fb.width;
+    let h = fb.height;
+    // Header: tag(1) + x(2) + y(2) + w(2) + h(2) = 9 bytes
+    let mut buf = Vec::with_capacity(9 + (w as usize * h as usize * 4));
+    buf.push(TAG_BLIT);
+    buf.extend_from_slice(&0u16.to_be_bytes()); // x
+    buf.extend_from_slice(&0u16.to_be_bytes()); // y
+    buf.extend_from_slice(&w.to_be_bytes());
+    buf.extend_from_slice(&h.to_be_bytes());
+    // RGBA pixels
+    for &px in &fb.pixels {
+        buf.extend_from_slice(&RGB332_LUT[px as usize]);
+    }
+    Message::Binary(buf)
+}
+
+fn make_resize_msg(w: u16, h: u16) -> Message {
+    let mut buf = Vec::with_capacity(5);
+    buf.push(TAG_RESIZE);
+    buf.extend_from_slice(&w.to_be_bytes());
+    buf.extend_from_slice(&h.to_be_bytes());
+    Message::Binary(buf)
+}
+
+// ---------------------------------------------------------------------------
+// WebSocket forwarding tasks
+// ---------------------------------------------------------------------------
+
+async fn forward_ws_send(
+    mut tx: futures_util::stream::SplitSink<WebSocket, Message>,
+    mut rx: mpsc::Receiver<Message>,
+) {
+    while let Some(msg) = rx.recv().await {
+        if tx.send(msg).await.is_err() {
+            break;
+        }
+    }
+}
+
+async fn forward_ws_recv(
+    mut rx: futures_util::stream::SplitStream<WebSocket>,
+    tx: mpsc::Sender<InputEvent>,
+) {
+    while let Some(Ok(msg)) = rx.next().await {
+        match msg {
+            Message::Binary(data) if !data.is_empty() => {
+                if let Some(evt) = parse_input(&data)
+                    && tx.send(evt).await.is_err()
+                {
+                    break;
+                }
+            }
+            Message::Close(_) => break,
+            _ => {}
+        }
+    }
+}
+
+fn parse_input(data: &[u8]) -> Option<InputEvent> {
+    match data[0] {
+        TAG_KEY_PRESS if data.len() >= 2 => Some(InputEvent::KeyPress(data[1])),
+        TAG_KEY_RELEASE if data.len() >= 2 => Some(InputEvent::KeyRelease(data[1])),
+        TAG_POINTER if data.len() >= 6 => {
+            let x = u16::from_be_bytes([data[1], data[2]]);
+            let y = u16::from_be_bytes([data[3], data[4]]);
+            let mask = data[5];
+            Some(InputEvent::Pointer { x, y, mask })
+        }
+        TAG_CTRL_ALT_DEL => Some(InputEvent::CtrlAltDel),
+        _ => None,
+    }
+}