24 lines
1.1 KiB
Markdown
24 lines
1.1 KiB
Markdown
# ECP-0016: mDNS peer discovery for gossip
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## Status
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Draft
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## Context
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Manual gossip peers are a barrier for LAN onboarding. iroh already supports an mDNS-based address lookup, which can discover endpoints on the local network without external infrastructure.
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## Decision
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Enable iroh's mDNS address lookup and use it as a peer discovery layer for catalog gossip. When gossip starts (or sharing announces), we probe mDNS for a short window and merge any discovered endpoints into the peer list.
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## Details
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- Enable iroh feature `address-lookup-mdns`.
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- Advertise `UserData = "every.channel"` for local discovery filtering.
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- When gossip is started, probe for ~2 seconds and merge discovered endpoints with configured peers.
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- mDNS discovery is best-effort; failures should not block manual peers.
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## Consequences
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- LAN nodes can connect and discover each other without copying addresses.
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- Global discovery still requires at least one public peer.
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## Follow-ups
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- Add a UI indicator when mDNS peers are found.
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- Evaluate relay-less LAN mode and mDNS-only sessions for local-first setups.
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