[Dnsmasq-discuss] Telling dnsmasq *not* to send router option??

[John Hallam]

I have a situation where my laptop sometimes connects to my IPv4 home
network over VPN and sometimes directly.  I want to use DHCP to
allocate the address of the VPN endpoint on the laptop, to be the same
as when it is connected directly to my wired network.  This basically
works fine.

However, the DHCP client wants to set up a default route, but does it
wrong.  OpenVPN knows how to do this right, and has already set the
default routing configuration correctly to point to the VPN tunnel,
except for those cases that should not route that way, so I want the
DHCP client not to set the default route.

Is it possible to instruct dnsmasq to refuse to send dhcp option 3
(router) and would this inhibit the DHCP client from setting a default
route?

(There are various reasons why I can't change the DHCP client and why
this behaviour needs to be server-driven.)

Any suggestions received gratefully...

Thanks,

	John Hallam