The discovery module defines the seam: DiscoveryProvider (subscribe/
announce over 32-byte TopicKeys) and a signed Announcement carrying
root hash, ed25519 author, metadata and provider addresses. Signatures
cover a deterministic postcard encoding including the topic (no cross-
channel replay) and the provider identities (addresses stay refreshable
hints). LanDiscovery conforms to the trait — mdns sightings become
locally-authored announcements, one per pinned root — and the daemon's
auto-sync now runs entirely through it: verify, index unconditionally,
fetch only for trusted authors from allowlisted providers on already-
pinned incomplete roots. The milestone-4 real-mdns sync test passes
unchanged through the new path. Verification unit tests cover round
trip, tampered root, wrong topic, forged author, mismatched signing
key, and serde survival. docs/redoal-integration.md sketches the
gesture-topic gossip provider against this contract.
Also: fix a flaky hang in the socket-activation test (dup2(3,3) leaves
CLOEXEC set when the listener already sits on fd 3; parent's listener
copy masked daemon death), and give the test client a read-timeout hang
guard. Add a top-level README.
Dependencies: ed25519-dalek (Signature type; same implementation iroh
keys use), postcard (deterministic signed encoding, iroh's canonical
compact codec).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Metered detection polls NetworkManager's Metered property over D-Bus
(feature "metered", default on; builds without D-Bus via
no-default-features). While metered the daemon closes incoming blob
connections and defers every fetch; VARDE_FORCE_METERED=true forces the
state as a kill switch and test hook. Endpoint UDP sockets get DSCP CS1
best-effort by matching bound ports to /proc/net/udp inodes (iroh hides
its fds). systemd socket activation adopts LISTEN_FDS fd 3, readiness
is a hand-rolled sd_notify READY=1 (abstract + path sockets), and
standalone binding still works unchanged. dist/ ships hardened system
and user units (DynamicUser, ProtectSystem=strict, StateDirectory,
RestrictAddressFamilies), a commented config example, scdoc man pages
validated with scdoc, and an untested PKGBUILD skeleton.
Tests: activation-socket round trip via a real fd-3 handoff, READY=1
received on a NOTIFY_SOCKET, metered daemons neither serve nor fetch.
Dependencies: zbus (optional, feature-gated D-Bus client for the
NetworkManager metered flag).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
bl