Hello,
I'm doing some firmware-related work and am using a --dhcp-hostsdir setup
to test several devices on my LAN. This is working fine, but I appear to
have hit the limits of my dnsmasq-fu when attempting to *toggle* the DHCP
options for a particular end host.
Namely, (1) the global config sets enable-tftp and (2) the hostsdir config
for the target device starts as "{mac},{ip},set:green". During my test I
(3) update it asynchronously to "{mac},{ip},set:red" and (4) hit dnsmasq
with SIGHUP. According to my understanding, this will cause dnsmasq to
clear its host cache and reload the hostsdir configs.
The only remaining question, then, is how to specify individual dhcp-option
disablement for the target. Specifically, for "red" tags, I tried the
following configuration to override the global tftp-enable setting:
dhcp-option=tag:red,option:tftp-server,""
dhcp-option=tag:red,option:tftp-server-address,""
dhcp-option=tag:red,option:boot-file-size,""
dhcp-option=tag:red,option:bootfile-name,""
Unfortunately, this approach seems to be flawed as the service complains
that empty string is an invalid option and never comes up.
Is there a common "disable" flag for scenarios like this? If so, I could
not find it in the docs. If not, what approach is recommended for these
kinds of per-host override situations?
Thanks!
~br
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