Listen for DHCP DISCOVER/REQUEST broadcasts on UDP 67 to catch devices as
early as possible — a device must request an address before doing almost
anything else, often before it has an IP.
Follows the mDNS/SSDP scanner pattern (finder/scanner/status modules) and
feeds the shared devices/events/notifications pipeline. The client MAC is
taken directly from the packet's chaddr, so no ARP probe is needed; a
DISCOVER with no assigned IP reuses any previously recorded address rather
than clobbering it. Exposes GET /api/dhcp_scanner/status, wired into the
OpenAPI generation, and adds a Dhcp variant to DeviceEventScanner.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Add a Network ports section noting that the mDNS (UDP 5353) and SSDP
(UDP 1900) ports are fixed by their protocols and must be available on
the host, alongside the configurable web server port.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Adds the retention.window option to the NixOS module and documents it
in the README alongside a new Storage considerations section covering
per-network-size estimates and guidance on tuning scan timings and the
retention window to meet storage requirements.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
