How to build a SIP proxy server with rsipstack?

Use the provided proxy example by running 'cargo run --example proxy' with parameters like port and external IP. It demonstrates registration handling, call routing, and transaction forwarding for a stateful proxy.

rsipstack vs SIP.js for building user agents?

rsipstack is a Rust library for server-side or native applications, offering full SIP compliance and high performance, while SIP.js is JavaScript-based for browser clients. Choose rsipstack for Rust backends and SIP.js for web frontends.

Does rsipstack support WebSocket transport?

Yes, WebSocket transport is supported but requires enabling the optional 'websocket' feature, which is enabled by default. This allows integration with WebRTC and browser-based communication.

How to handle digest authentication in rsipstack?

Use the built-in authentication support via the Credential struct in the dialog layer, as shown in the user agent example, to handle secure SIP communications with username and password.

What are the performance benchmarks for rsipstack?

Benchmark tests in the README show over 1,500 calls per second in local setups, leveraging Rust's efficiency. However, real-world performance depends on network conditions and application complexity.

Can rsipstack integrate with WebRTC for browser calls?

Yes, it's designed for integration with WebRTC, such as in WebRTC SBC scenarios, by using WebSocket transport and handling SIP signaling, though media handling requires additional WebRTC libraries.

Open-Awesome

rsipstack

MITRust

A high-performance, RFC-compliant SIP stack library written in Rust for building SIP applications like proxies, registrars, and user agents.

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201 stars61 forks0 contributors

What is rsipstack?

rsipstack is a SIP (Session Initiation Protocol) stack library written in Rust that enables developers to build SIP-based communication applications. It provides a complete implementation of SIP standards (RFC 3261/3262) for handling SIP transactions, dialogs, and authentication, solving the need for a high-performance, reliable SIP foundation in Rust projects.

Target Audience

Developers building SIP-based communication systems such as SIP proxies, registrars, user agents, WebRTC gateways, or custom telephony applications who want Rust's performance and safety guarantees.

Value Proposition

Developers choose rsipstack because it offers full SIP compliance with Rust's performance advantages, supports multiple transports (UDP, TCP, TLS, WebSocket), and provides a clean API that simplifies building complex SIP applications compared to lower-level alternatives.

Overview

SIP Stack Rust library for building SIP applications

Use Cases

Best For

Building custom SIP proxy servers for call routing
Creating SIP registrars for user location management
Developing SIP user agent clients as alternatives to SIP.js
Integrating SIP with WebRTC for browser-based communication
Implementing stateful SIP transaction handling
Building high-performance SIP applications with Rust

Not Ideal For

Teams needing out-of-the-box SIP softphone applications with graphical interfaces
Projects targeting WebAssembly (WASM) environments, as support is still listed in TODO
Developers unfamiliar with SIP protocol details, due to manual transaction and dialog handling
Environments where non-Rust languages are mandated, such as legacy C/C++ codebases

Pros & Cons

Pros

Full SIP Compliance

Implements RFC 3261/3262 standards, ensuring reliable session initiation, transaction handling, and dialog management for SIP-based applications.

Multi-Transport Support

Supports UDP, TCP, TLS, and WebSocket transports, with TLS and WebSocket enabled via optional features, providing flexibility for different network environments.

High Performance

Built in Rust for maximum throughput and low latency, demonstrated in benchmark tests with over 1,500 calls per second in example scenarios.

Comprehensive API Layers

Offers transaction and dialog layers with easy-to-use endpoints, simplifying the build of stateful proxies, registrars, and user agents.

Cons

Incomplete WASM Support

WASM target is listed as a TODO item, limiting immediate use in web-based or browser-focused applications without additional development work.

Steep Learning Curve

Requires deep knowledge of SIP protocol specifics and Rust's async ecosystem, as shown by complex example code for proxies and clients in the README.

Limited Ecosystem Integration

Being a Rust-specific library, it lacks pre-built integrations with common telephony hardware, cloud services, or GUI frameworks, necessitating custom development.

Open Source Alternative To

rsipstack is an open-source alternative to the following products:

SIP.js

SIP.js is a JavaScript library for building Session Initiation Protocol (SIP) clients, enabling real-time communication like voice and video calls in web browsers.

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