int rtnl_set_link_name(sd_rtnl *rtnl, int ifindex, const char *name);
int rtnl_set_link_properties(sd_rtnl *rtnl, int ifindex, const char *alias, const struct ether_addr *mac, unsigned mtu);
int rtnl_set_link_name(sd_rtnl *rtnl, int ifindex, const char *name);
int rtnl_set_link_properties(sd_rtnl *rtnl, int ifindex, const char *alias, const struct ether_addr *mac, unsigned mtu);