Introducing an OpenBSD LLDP daemon
by from OpenBSD Journal on (#6WVVF)
Our favorite operating system may be on the verge of having a LLDP(Link Layer Discovery Protocol)daemon added to the base system. David Gwynne (dlg@) is circulating a patch on tech@ that introduces the daemon,
List: openbsd-techSubject: LLDP daemon and display toolFrom: David Gwynne <david () gwynne ! id ! au>Date: 2025-04-24 3:49:53this adds a small daemon and command line tool for receiving anddisplaying LLDP messages from neighbors connected to Ethernetinterfaces.the daemon is called olldpd(8) to avoid colliding with the existinglldpd from ports. the command line tool is lldp(8).it uses the AF_FRAME sockets that were recently added rather than BPF.this means it retains fewer privileges while it's running because itdoesn't have to open and configure BPF devices when new interfacesappear in the system. avoiding BPF means it has basically 0 impact onthe kernel packet path because AF_FRAME is handled as a last resort forpackets rather than up front for every packet on an interface.