dhcpcd-discuss

Perhaps the key here is that, if a device switches between protocols (e.g. DHCP to BOOTP) or between network interfaces (e.g. eth0 to wlan0) and it is desirable to obtain the host name from the new interface or protocol, the device should reset its host name back to a default value (e.g. localhost).  Then dhcpcd will update the host name using from the new source.