WebRTC Signaling Server & Client in Go (For Rust Integration)

Objectives:

• A signaling server in Go using WebSockets to help clients find and connect with each other.
• A WebRTC client in Go that talks to the server and handles ICE candidates and session details.
• An FFI (Foreign Function Interface) so Rust can use the Go WebRTC client.

Overview

This project is a WebRTC signaling server implemented in Go with FFI bindings for Rust. It handles peer discovery, WebSocket-based signaling, API key authentication, and session management. The client-side WebRTC logic is also managed in Go, while the UI is handled separately using Svelte or Rust.

Features

• WebSocket-based signaling
• API key authentication
• ICE candidate exchange and restart handling
• Room management and peer discovery
• DataChannel error handling
• STUN server configuration

Installation

Prerequisites

• Go 1.18+
• Rust (latest stable version)
• Node.js (for frontend development)
• WebRTC-compatible browsers
• Visual Studio Build Tools (for Windows users compiling Rust with MSVC)

Steps

1. Clone the repository:

   git clone https://github.com/sushiag/go-webrtc-signaling-server.git
   cd go-webrtc-signaling-server
   

2. Install dependencies:

   go mod tidy
   

3. Build and run the server:

   go run main.go
   

API Reference

WebSocket Messages

• offer – Sent when a peer creates an SDP offer.
• answer – Sent when a peer responds with an SDP answer.
• ice-candidate – Sent when a new ICE candidate is discovered.
• join – Used to join a signaling room.
• leave – Used to leave a signaling room.

Troubleshooting

Common Issues

1. WebSocket Connection Fails

• Ensure the server is running and accessible.
• Check if firewall rules allow WebSocket traffic.

2. ICE Connection Fails

• Verify STUN server configuration.
• Check if network restrictions block WebRTC traffic.

3. Rust Compilation Issues (Windows)

• Ensure Visual Studio Build Tools are installed.
• Run:

  rustup show
  

  and confirm msvc toolchain is used.

Contribution Guidelines

1. Fork the repository and create a new branch.
2. Make your changes and run tests.
3. Submit a pull request with a clear description.

License

This project is licensed under the MIT License.