micronet

Ethernet bring-up and DHCP gateway daemon for BigFred OS. One process on the hub's physical Ethernet: JSON config, Unix-socket IPC, inotify hot-reload. Chooses client, gateway, or static .252 from a DHCPDISCOVER probe and a ping of gateway.ip.

Features

• Three modes: foreign DHCP → client (dhclient); live gateway.ip → static; empty LAN → gateway + dnsmasq
• Choose iface + mode once; afterwards only watch carrier (linkRetrySecs, default 15). No periodic DHCP probe
• DHCPDISCOVER only at select time (no REQUEST); ICMP ping of gateway.ip after a temporary .252 if the iface has no address yet
• dnsmasq only in gateway (pool .50–.200, sticky MAC→IP lease 7d, option:router / dns-server)
• Optional dns section in JSON: static unicast A records (host-record=) served only in gateway
• Physical Ethernet only (not lo, bridge, virtual, Wi-Fi)
• Owns all cable Ethernet: picks one with carrier (interface null / omitted / "auto"); remaining ifaces are flushed and admin-down. Unplug → wait linkRetrySecs, then one re-select. An explicit name pins the device
• JSON camelCase under $DATA_DIR/etc/micronet.json (no hardcoded /data/...); invalid reload keeps the previous config
• Unix socket $DATA_DIR/run/micronet.sock (4-byte LE length + JSON); status.healthy is the liveness verdict
• std::thread (no tokio); musl arm64

Docs

• ARCHITECTURE.md — canonical design
• CODING-GUIDELINES.md — engineering standard (copy of microinit)
• Event WiFi mount: docs/networking (EN) / PL

Build

make build
make test
make release-musl