📦 @goodandready/dsh-lanmode

⚡ Why DSH Breaks Over LAN

By default, modern browsers and DeepSeek Harness block key capabilities when accessed over plain HTTP from local IP addresses:

1. 🔒 Disabled Settings: isLoopbackHostname disables plugin cards and switches settings to read-only memory mode outside loopback.
2. 💥 Broken UUIDs: crypto.randomUUID() requires a secure context (HTTPS or localhost).
3. 📋 Blocked Clipboard & Microphone: navigator.clipboard and getUserMedia are blocked over plain HTTP.
4. 🛡️ Core API Protection: DSH core restricts configuration and credential APIs to 127.0.0.1 callers.

dsh-lanmode solves these limitations via polyfill injection, a direct TLS bridge, mDNS, local Root CA, and an interactive settings card.

✨ Features Overview

1. 📱 Quick QR Popover, /mobileqr Command & Mobile Pairing

• Sidebar Quick QR: Tap the mobile icon in the sidebar footer (sidebar.footer / sidebar.rail) to open an interactive popover with an SVG QR code, LAN/WAN toggle, and copy button.
• Terminal & Chat: Register the /mobileqr chat tool and print an ASCII QR code to stdout on launch.
• Diagnostics: Vector QR available at /dsh-lanmode/qr and on /dsh-lanmode/health.

2. 📲 PWA & Standalone Mode

• Route /dsh-lanmode/manifest.json with viewport-fit=cover, apple-mobile-web-app-capable, and theme-color.
• Fullscreen standalone app experience on iOS and Android with notch safe-area insets.

3. 🌐 Automatic mDNS (dsh.local)

• Built-in lightweight UDP 5353 responder broadcasting dsh.local across the local subnet.

4. 🔐 Local Root CA for Trusted HTTPS

• Self-generated dsh-lanmode Local Root CA (10-year validity) $\rightarrow$ Server Certificate with SANs for dsh.local, LAN IPs, and localhost.
• Route GET /dsh-lanmode/ca.crt for certificate installation on mobile devices. Supports SNI via tlsSites.

5. 🔔 Background System Notifications (Web Notifications API)

• Hooks into turn/end and approval/asked session events. Dispatches native push notifications when the tab is hidden (document.hidden).

6. 🎨 Settings Card in «Settings → Plugins» (lib/client.js)

• Interactive plugin card: connection status, one-click LAN URL copying, QR popover toggle, notification switch, and Root CA link.

7. 🛡️ Access Control, LAN PIN & Security

• unlockPrivileged: Master gate for settings & credentials mutation from LAN.
• allowUnprivilegedLan: Explicit opt-in permitting remote LAN clients to access privileged endpoints without PIN authentication (default false, fail-closed).
• lanPin / lanPinRef: Optional PIN protection for privileged operations. LAN PIN supports both plaintext and PBKDF2 digests (pbkdf2$sha512$100000$salt$hash) generated via hashPin(). Brute-force rate limiting enforces a 15-minute lockout after 5 consecutive failed attempts per IP (HTTP 429).
• Subnet Role Separation: Distinct adminAllow and guestAllow CIDR rules. Subnets designated under guestAllow are strictly prohibited from mutating system settings or revoking sessions (403 Forbidden).
• Route Protection & Body Limits: Internal plugin routes (/dsh-lanmode/devices, /dsh-lanmode/tunnel, /dsh-lanmode/api/config) feature fail-closed authorization. GET /dsh-lanmode/tunnel requires administrator verification (403 for guests). Login, config, and tunnel requests stop reading after 64 KiB and return HTTP 413.
• CSRF Mitigation: Mutating POST requests reject cross-site invocations (Sec-Fetch-Site: cross-site) and validate origin headers.
• Password Storage & Verification: Passwords support both plaintext and scrypt digests (scrypt$16384$8$1$salt$hash) via hashAuthPassword(). Verification runs in constant time (timingSafeEqual), with dummy scrypt passes preventing timing attacks. Changing password immediately revokes all other active sessions for that user.
• Session & Device Tokens: Active sessions and device tokens are indexed via SHA-256 digests (hashToken); raw session and cookie tokens are never stored in memory registry, JSON API, or serialized disk files (dsh-lanmode-devices.json and .bak).
• Atomic Backup Snapshots & Fail-Closed Storage: Registry and ban .bak files are generated atomically using temporary files and atomic rename. Corrupted data files without valid backup engage fail-closed security mode (HTTP 403 for non-loopback traffic) that persists across routine writes and reloads, with automatic recovery from backup if the primary file is missing.
• Instant Secret Rotation: Secret references (lanPinRef, authPasswordRef, tunnelTokenRef) query the provider context fresh per operation across all API endpoints, applying external rotations immediately to subsequent requests without requiring restarts or configuration resaves.
• UI Localization: PIN modal dynamically resolves localization via parts.translate across Chinese, English, and Russian without exposing raw dictionary keys.

8. 📱 Connected Devices & Session Management

• Live client presence tracking and device OS/browser discovery (iOS, Android, Windows, macOS, Linux).
• Per-device token revocation and emergency "Revoke All Others" kill switch in the settings card.
• Bridge routes that list or revoke devices require administrator access (403 for guests).

9. 🌐 Multi-Interface & Mesh Detection

• Automatic identification of local LAN, Tailscale (100.x.y.z), WireGuard, and VPN adapters with quick-select UI pills.
• Automated firewall management for Windows Defender Firewall, Linux UFW, and firewalld.

10. ⚡ Live Network Telemetry & HTTP/2 ALPN

• Compact real-time telemetry widget displaying RTT ping latency, active concurrent connections, and streaming data volume.
• Native HTTP/2 (ALPN h2) bridge support alongside HTTP/1.1 for multiplexed low-latency streaming.

11. 🚀 Connection Pooling & SSE Streaming Isolation

• Upstream connections to DeepSeek Harness are segregated into two independent pools: standard HTTP (up to 100 reusable sockets with 15s queue timeout) and dedicated streaming pool (SSE, /api/chat/stream). Streaming traffic never starves static or API responses.

12. ☁️ Cloudflare WAN Tunnels & Tunnel PIN

• Quick Tunnels and Named Tunnels: Remote access via Cloudflare without port forwarding or static IP. Supports temporary Quick Tunnels (trycloudflare.com) and persistent Named Tunnels (tunnelToken / tunnelTokenRef).
• Fail-Closed Tunnel Startup: Tunnel service verifies listener health and refuses to start if direct listener is not active, never falling back to unencrypted core port.
• Tunnel PIN: When lanPin (or lanPinRef) is configured, inbound HTTP requests and WebSocket upgrades through Cloudflare tunnels require LAN PIN verification (tunnelPin: true, default). If no PIN is configured, tunnel requests do not challenge a PIN.

13. 🔄 One-Click Plugin Updates

• Integrated updater service in settings card (/api/dsh-lanmode/update) with npm registry check and protected admin perimeter.

📦 Quick Install

dsh plugin --profile web add @goodandready/dsh-lanmode

⚙️ Configuration (Profile cordis.patch.yml)

# ~/.dsh/profiles/web/cordis.patch.yml
- id: dsh-lanmode
  config:
    mode: direct             # direct, proxy, or auto
    directHost: 0.0.0.0      # defaults to 127.0.0.1
    directPort: 3080
    mdns: true               # dsh.local on LAN
    pwa: true                # PWA manifest
    tls: self-signed         # self-signed, files, or off
    unlockPrivileged: true   # LAN settings access
    lanPinRef: ""            # PIN secret
    tunnelTokenRef: ""       # Cloudflare tunnel token
    allow:
      - 192.168.0.0/16
      - 10.0.0.0/8
    passwordAuth: false      # Password gate
    authPasswordRef: ""      # Password secret
    publicHost: ""
    disabledUsers: []
    trustedProxyCidrs: []
    tlsSites: []
    adaptiveCompression: true

📄 License

MIT © GooDAnDReaDY