It would be nice if dnsmasq were able to send PREF64 prefix used for nat64. dnsmasq does not implement dns64, but can send clients to DNS servers implementing it. If used as local Router Advertisement daemon, it should be able to send those options. Additional feature nice to implement would be ability to send binary-encoded options, which it does not support natively. Just like it can send any dhcp options. Reproducible: Always