[Dnsmasq-discuss] Do "proxy-DHCP" without PXE

[Steven Maddox]

Hello,	
	
Sorry if what I'm about to ask is impossible, but I just really needed 
to know one way or another.	
	
I find dnsmasq such a handy utility for all kinds of situations (so huge 
thanks for creating it!)... one such situation was back when I was 
working with ThinStation and I'd do something like this to quickly test 
how a new build would boot on some PXE enabled machines...	
	
dnsmasq -d -i enp2s0 -F192.168.1.0,proxy --enable-tftp 
--tftp-root="$(pwd)/build/boot-images/pxe" -p0 --log-dhcp 
--pxe-service=x86PC,'Network Boot',boot/lpxelinux/lpxelinux	
	
Ultimately it's the "proxy-DHCP" that I'm focussing on here.	
	
Would it be possible to use this technique to add extra arbitrary DHCP 
options to a reply instead?  without touching the config of the 
authoritative "other" DHCP server? e.g...	
	
dnsmasq -d -i enp2s0 -F192.168.1.0,proxy --enable-tftp 
--tftp-root="$(pwd)" -p0 --log-dhcp -O 160,tftp://192.168.1.2	
	
This would be really handy in a scenario where you need to tell a bunch 
of devices (e.g. Polycom phones) a new provisioning URL (in that example 
option 160) on a temporary basis whilst you reboot/factory-reset them. 
Especially when you're stuck using whatever existing DHCP server is on 
the network with no ability (or great difficulty) to reconfigure it.	
	
But I have a feeling I'm going to be told that "proxy-DHCP" is, and can 
only be, a PXE specific thing?  if so, what is that?	
	
Thanks	
	
-- 
Steven Maddox
Lantizia