Comment 5 for bug 1045617

Since this patch merged, the current logic supports your scenarios. The only difference is that the gateway_ip treated separately and pushed as the default route iff it is defined. Regardless of the value for gateway_ip dnsmasq will send host_routes for non default routing options if the client requests it.

Are you advocating that we only define the default route in host_routes and drop gateway_ip? If so, we'll have to add logic to convert that route to option 3 because some clients don't request option 121 (Cirros).