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d9f882bea2
Currently, dhcp_release will only send a 'fake' release when the address given is in the same subnet as an IP on the interface that was given. This doesn't work in an environment where dnsmasq is managing leases for remote subnets via a DHCP relay, as running dhcp_release locally will just cause it to silently exit without doing anything, leaving the lease in the database. Change it to use the default IP on the interface, as the dnsmasq source code at src/dhcp.c does, if no matching subnet IP is found, as a fall-back. This fixes an issue we are seeing in certain Openstack deployments where we are using dnsmasq to provision baremetal systems in a datacenter. While using Dbus might have seemed like an obvious solution, because of our extensive use of network namespaces (which Dbus doesn't support), this seemed like a better solution than creating system.d policy files for each dnsmasq we might spawn and using --enable-dbus=$id in order to isolate messages to specific dnsmasq instances. Signed-off-by: Brian Haley <haleyb.dev@gmail.com>