int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *newlink);
int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t cb);
int netdev_create_tunnel(Link *link, sd_rtnl_message_handler_t callback);
int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *newlink);
int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t cb);
int netdev_create_tunnel(Link *link, sd_rtnl_message_handler_t callback);