wavekat-sip 0.0.8

SIP signaling and RTP transport for voice pipelines, built on rsipstack. Same pattern as wavekat-vad and wavekat-turn.

[!WARNING] Early development. API will change between minor versions.

What this crate is

A small, focused SIP/RTP toolkit for building softphones, voice bots, and recording bridges in Rust. It owns the wire-level concerns —

SIP signaling: REGISTER (with digest auth + keepalive), INVITE (in/out), BYE, dialog tracking.
SDP: minimal offer/answer for G.711 telephony audio.
RTP: header parser and a receive loop suitable for transcription / recording / debug.

— and stays out of the audio device, codec, and call-orchestration layers so it remains light and embeddable.

Quick Start

cargo add wavekat-sip

use std::sync::Arc;
use tokio_util::sync::CancellationToken;
use wavekat_sip::{Registrar, SipAccount, SipEndpoint, Transport};

# async fn run() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
let account = SipAccount {
    display_name: "Office".into(),
    username: "1001".into(),
    password: "secret".into(),
    domain: "sip.example.com".into(),
    auth_username: None,
    server: None,
    port: None,
    transport: Transport::Udp,
};

let cancel = CancellationToken::new();
let (endpoint, _incoming) = SipEndpoint::new(&account, cancel.clone()).await?;
let endpoint = Arc::new(endpoint);

// Expires: 60s, re-register every 50s.
let registrar = Registrar::new(account, endpoint, cancel, 60, 50)?;
registrar.register().await?;
registrar.keepalive_loop().await;
# Ok(())
# }

INVITE wrappers (Caller, Callee) land in the next release. Until then, drive SipEndpoint::dialog_layer directly.

Status

Module	State
`account`	Stable — runtime SIP account type.
`endpoint`	Working — shared SIP endpoint + transport.
`registrar`	Working — REGISTER + auth + keepalive + unregister.
`sdp`	Working — minimal G.711 offer/answer.
`rtp`	Header parser + debug receive loop. RTP send next.
`caller`	Planned — outbound INVITE wrapper.
`callee`	Planned — inbound INVITE accept/reject helper.

Architecture

PSTN / SIP trunk
       │
       ▼
   wavekat-sip   ──►  rsipstack (transport, transactions, dialogs)
       │
       ├─ account ──── credentials + endpoint config
       ├─ endpoint ─── UDP/TCP transport + DialogLayer
       ├─ registrar ── REGISTER / digest auth / keepalive
       ├─ sdp ──────── offer/answer for telephony codecs
       └─ rtp ──────── RTP header parse + receive
       │
       ▼
   your app  ──► audio device I/O, codec, recording, AI pipeline

License

Licensed under Apache 2.0.

Acknowledgements

rsipstack — the SIP transaction / dialog engine this crate wraps.
rsip — SIP message types.