STUN relay handshake¶
Relay - stun-relay
REL-02 - status: draft - audio, video, group
A STUN-dialect handshake binds the client to a relay candidate before WARP media frames flow.
- Candidates come from the offer's
<destination>(see call-offer), each annotated with measured latency. - The client MUST complete the STUN handshake against these candidates to establish the client↔relay binding that WARP frames ride over.
- The client SHOULD select the lowest-latency candidate.
Requires: call-offer
Breakdown: media-loop, relay-candidates, warp, call-relaylatency, call-transport, flow-outgoing-1to1
Implemented by
| Flavor | Status | Source | Notes |
|---|---|---|---|
whatsapp-rust |
working | history - blame - commits 674e851 |
— |
zapo-caller |
working | — | — |
Annotation wacrg:REL-02 — a flavor marks its implementation site in source with this comment; a script clones the source, finds it, and attaches the commit blame/permalink.
Contributors
| Contributor | Role |
|---|---|
 Rajeh Taher |
wrote initial spec |
protocol history / diff - blame
Changelog¶
- 2026-06-21 — Initial spec entry.