# Meet Server

The high-performance signaling and media relay server for the Meet application. Built with **Rust**, **Axum**, and **Tokio**.

## Features
- **Signaling**: WebSocket-based room management and peer discovery.
- **Media Relay**: Custom UDP protocol for low-latency video and screen sharing.
- **Architecture**: Asynchronous, localized state management using `DashMap`.

## Prerequisites
- **Rust**: Latest stable version. Install via [rustup.rs](https://rustup.rs).
- **Build Tools**: `build-essential` (Ubuntu) or `Development Tools` group (Fedora/RHEL).

## Installation

1.  **Clone the Repository**:
    ```bash
    git clone <your-server-repo-url>
    cd server
    ```

2.  **Verify Shared Crate**:
    Ensure the `shared` directory exists in the root. This contains protocol definitions used by both client (logic port) and server.
    ```bash
    ls -F shared/
    ```

3.  **Build**:
    ```bash
    cargo build --release
    ```
    The binary will be located at `target/release/server`.

## Running the Server

### Ports
- **TCP/WebSocket**: 6000 (Bind: `0.0.0.0:6000`)
- **UDP (Media)**: 4000 (Bind: `0.0.0.0:4000`)

### Local Development
```bash
cargo run
```
Runs on `0.0.0.0:6000` (HTTP/WS) and `0.0.0.0:4000` (UDP).

### Production Deployment
1.  **Run the Binary**:
    ```bash
    ./target/release/server
    ```
2.  **Firewall**:
    Ensure **TCP 6000** and **UDP 4000** are open.
    ```bash
    # Fedora/CentOS
    sudo firewall-cmd --add-port=6000/tcp --permanent
    sudo firewall-cmd --add-port=4000/udp --permanent
    sudo firewall-cmd --reload

    # Ubuntu/Debian (UFW)
    sudo ufw allow 6000/tcp
    sudo ufw allow 4000/udp
    ```
3.  **Systemd (Optional)**:
    Create a service file `/etc/systemd/system/meet-server.service` to keep it running.

## Project Structure
- `src/main.rs`: Entry point. Sets up Axum router and spawns the UDP listener.
- `src/handlers.rs`: WebSocket handlers for joining rooms, signaling, and chat.
- `src/udp.rs`: The core UDP packet handling loop. Manages media relaying.
- `src/state.rs`: Shared application state (Rooms, Peers).
- `shared/`: Local crate containing shared data structures (`Packet` headers, `MediaType` enums).