+int sd_dhcp6_client_set_duid(sd_dhcp6_client *client, uint16_t type, uint8_t *duid,
+ size_t duid_len);
+int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client,
+ uint16_t option);
+
+int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret);