pb-mapper

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Make local services readily available wherever you are

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<p>
  <a href="README.md"><b>English</b></a> ·
  <a href="README.zh-CN.md">中文</a>
</p>

</div>

---

**pb-mapper** exposes any number of local TCP/UDP services through a **single** public port. Instead of frp-style one-port-per-service mapping, services register under a key and anyone holding that key can reach them.

## Highlights

- **One public port** — a service-key registry replaces per-service port planning; CLI and GUI share the same workflow.
- **Optional encryption** — AES-256-GCM (via `ring`) on forwarded traffic, enabled with `--codec` at registration.
- **Proven in production** — on real workloads (e.g. a Palworld UDP server), latency matches frp with a directly exposed port.

## Quick Start

### Recommended — AI agent deployment skill

With an AI coding agent (Claude Code, Cursor, Kiro), the built-in skills handle deployment interactively. The binary is downloaded locally and uploaded over SCP, so the remote host needs no GitHub access.

- `/pb-mapper-server-deploy` — deploys `pb-mapper-server` as a systemd service.
- `/pb-mapper-client-cli-deploy` — same flow for `pb-mapper-client-cli`, plus end-to-end validation.

### Alternative — one-liner install script

If the remote host can reach GitHub directly, this installs `pb-mapper-server` as a systemd service on Linux (x86_64, musl) — port `7666`, `--use-machine-msg-header-key` on, key stored at `/var/lib/pb-mapper-server/msg_header_key`.

```bash
curl -fsSL https://raw.githubusercontent.com/acking-you/pb-mapper/master/scripts/install-server-github.sh | bash
```

After install, load the same key for `pb-mapper-server-cli` and `pb-mapper-client-cli`:

```bash
export MSG_HEADER_KEY="$(cat /var/lib/pb-mapper-server/msg_header_key)"
```

## Architecture

![pb-mapper architecture](https://raw.githubusercontent.com/acking-you/pb-mapper/master/docs/assets/architecture.svg)

- **Local service side** (green) — `pb-mapper-server-cli` registers a local TCP/UDP service.
- **Public network** (blue) — `pb-mapper-server` keeps the registry and forwards data bidirectionally.
- **Remote client side** (orange) — `pb-mapper-client-cli` subscribes to a key and exposes it as a local port.

Either CLI can be replaced by the Flutter UI.

### Example: reach a home web server from a coffee shop

Your web server runs on `localhost:8080` at home.

```
                  Home LAN                    Public Server                Coffee Shop
          ┌─────────────────────┐       ┌──────────────────┐       ┌──────────────────┐
          │  Web Server :8080   │       │  pb-mapper-server│       │  Browser :3000   │
          │        ↑            │       │     :7666        │       │       ↑          │
          │  server-cli ────────┼──────►│  key='web' ──────┼◄──────┼── client-cli     │
          └─────────────────────┘       └──────────────────┘       └──────────────────┘
```

```bash
# 1. on the public server — start the central router
pb-mapper-server --port 7666

# 2. at home — register the web server under key 'web'
pb-mapper-server-cli --server <public-ip>:7666 --key web --local 127.0.0.1:8080

# 3. at the coffee shop — subscribe and expose it locally
pb-mapper-client-cli --server <public-ip>:7666 --key web --local 127.0.0.1:3000
```

Open `http://localhost:3000` in the coffee-shop browser — traffic flows through the public server back home.

## Components

| Component | Role |
| --- | --- |
| `pb-mapper-server` | Central router (default port `7666`) |
| `pb-mapper-server-cli` | Registers a local TCP/UDP service with the server |
| `pb-mapper-client-cli` | Subscribes to a registered service and exposes a local port |
| **Flutter UI** (`ui/`) | GUI replacement for both CLIs |

## Developer view

- **Rust core** — binaries in `src/bin/`; shared protocol and networking in `src/common` and `src/utils`; server / client internals in `src/pb_server`, `src/local/server`, `src/local/client`.
- **Flutter UI** — views in `ui/lib/src/views`, FFI layers in `ui/lib/src/ffi`, Rust bridge in `ui/native/pb_mapper_ffi`. FFI calls run on a background isolate, and Rust returns JSON (`{success, message, data}`) to keep the C ABI stable.

## Documentation

- User guide (build / run / use): [`docs/user-guide.md`](docs/user-guide.md)
- Docker server guide: [`DOCKER_README.md`](DOCKER_README.md)
- 中文文档: [`README.zh-CN.md`](README.zh-CN.md), [`docs/user-guide.zh-CN.md`](docs/user-guide.zh-CN.md)

## Repository layout

- `src/` — Rust backend
- `ui/` — Flutter UI + native bridge
- `docs/` — documentation and assets
- `docker/`, `services/`, `scripts/`, `tests/` — deployment and tooling
- `skills/` — AI coding agent deployment skills (server, client-cli)

## License

Released under the [MIT License](LICENSE).

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