int dhcp6_request_address(Link *link);
int ndisc_configure(Link *link);
-bool link_lldp_enabled(Link *link);
-bool link_ipv4ll_enabled(Link *link);
-bool link_ipv6ll_enabled(Link *link);
-bool link_dhcp4_server_enabled(Link *link);
-bool link_dhcp4_enabled(Link *link);
-bool link_dhcp6_enabled(Link *link);
-bool link_ipv6_accept_ra_enabled(Link *link);
-
const char* link_state_to_string(LinkState s) _const_;
LinkState link_state_from_string(const char *s) _pure_;