typedef void *netlink_regnets_fn(void *st, struct subnet_list *networks,
netlink_deliver_fn *deliver, void *dst,
uint32_t max_start_pad, uint32_t max_end_pad,
typedef void *netlink_regnets_fn(void *st, struct subnet_list *networks,
netlink_deliver_fn *deliver, void *dst,
uint32_t max_start_pad, uint32_t max_end_pad,