When the configured Ethernet interface holds a DHCP-assigned IPv4 at
startup, the app now skips wifi.Initialize / StartEventMonitoring and
guards every wifi.* wrapper against a nil backend. This prevents D-Bus
calls to fi.w1.wpa_supplicant1 from re-activating the daemon via
dbus-activation, honoring the "do nothing" intent of the Ethernet path.
The probed state is exposed in SystemStatus and rendered in the header
as a third pill ("Ethernet · <IP>"); a new "disabled" connectionState
covers the WiFi pill in this mode.
Probe the configured Ethernet interface (default eth0, overridable via
-ethernet-interface) at startup. If no DHCP-assigned IPv4 is present,
start the wpa_supplicant service so the WiFi backend has something to
talk to; otherwise leave it alone and rely on the wired uplink.
Hostapd already parsed signal strength and rx/tx counters but the
station -> ConnectedDevice conversion threw them away. Add signalDbm,
rxBytes, txBytes and connectedAt to the OpenAPI schema and the
ConnectedDevice model, and centralise the conversion in
station.ToConnectedDevice so handlers, the periodic refresh and the
event callbacks all serialise the same shape.
Two follow-on bugs surfaced while wiring this up:
- The hostapd backend only stored station entries on first contact.
Subsequent polls were dropped, so signal and byte counters never
refreshed. Reconcile updates in checkStationChanges.
- ConnectedAt was reset to time.Now() on every conversion. Track
FirstSeen on HostapdStation when the station joins, and preserve
the timestamp across periodic refreshes in app.go so the UI's
"connected since" badge is stable.
Frontend gains a metrics row on each device card with signal bars,
total traffic and a live duration. Falls back gracefully when a
backend (DHCP, ARP) doesn't expose these fields.
Bind to localhost by default and stop echoing backend errors (which can
embed credentials or low-level details) back over the API and log
broadcast. Validate hotspot SSID/passphrase/channel before writing
hostapd.conf and tighten its mode to 0600 since it stores the WPA PSK.
Restrict WebSocket upgrades to same-origin so a LAN browser can't be
turned into a proxy for the API.
Guard shared state: status reads/writes go through StatusMutex (the
periodic updater races with the toggle and status handlers otherwise),
broadcastToWebSockets no longer mutates the client map under RLock, and
station-event callbacks now run under SafeGo so a panic in app code can't
take down the daemon. Stop channels in hostapd, dhcp, and iwd signal
monitors are now closed under sync.Once to survive concurrent Stop calls.
App.Shutdown is idempotent and waits for the periodic loops before
closing backends, so signal-driven and deferred shutdowns no longer race.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Implement comprehensive configuration management with CLI flags for WiFi interface, device discovery method, and file paths. Add ARP table parsing as an alternative to DHCP leases for more reliable device detection. Improve WiFi scanning to handle concurrent scan requests gracefully.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
