[......]

+ *
+ * If 0 is passed as @flags, libvirt will choose the best way, and won't
+ * include agent in it.

I'm thinking if we don't need to be so complicated, by defaulting to one
of _LEASE or _SNOOP explicitly.

That says (conclusion of all of above), I'm wondering if define the enum like
blow is better.


typedef enum {
    VIR_DOMAIN_INTERFACE_ADDRESSES_AGENT = (1 << 1), /* Query qemu guest agent */

And s/AGENT/GUEST_AGENT/, since "AGENT" could mean too much than "guest agent"