florian@ committed a fix for this the other day: http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sbin/dhcpleased/frontend.c.diff?r1=1.28&r2=1.29
CVSROOT: /cvs Module name: src Changes by: [email protected] 2022/04/26 08:50:04 Modified files: sbin/dhcpleased: frontend.c Log message: Do not send a hostname option when we don't have a hostname. The minimum length of a hostname is 1 according to RFC 2132. Found the hard way by Ibrahim Khalifa (ibo AT trukonsult.se) with DHCP Relay on a Cisco ASA in the installer where we don't have a hostname yet. Ibrahim also provided a diff which I simplified a bit. OK tb
