int sd_rtnl_message_get_type(sd_rtnl_message *m, uint16_t *type);
int sd_rtnl_message_link_get_ifindex(sd_rtnl_message *m, int *ifindex);
+int sd_rtnl_message_link_get_flags(sd_rtnl_message *m, unsigned *flags);
int sd_rtnl_message_append(sd_rtnl_message *m, unsigned short type, const void *data);
int sd_rtnl_message_open_container(sd_rtnl_message *m, unsigned short type);