+int sd_dhcp_client_set_mac(sd_dhcp_client *client, const uint8_t *addr,
+ size_t addr_len, uint16_t arp_type);
+int sd_dhcp_client_set_mtu(sd_dhcp_client *client, uint32_t mtu);
+int sd_dhcp_client_set_hostname(sd_dhcp_client *client, const char *hostname);
+int sd_dhcp_client_set_vendor_class_identifier(sd_dhcp_client *client, const char *vci);
+int sd_dhcp_client_get_lease(sd_dhcp_client *client, sd_dhcp_lease **ret);
+
+int sd_dhcp_client_stop(sd_dhcp_client *client);
+int sd_dhcp_client_start(sd_dhcp_client *client);
+
+sd_dhcp_client *sd_dhcp_client_ref(sd_dhcp_client *client);
+sd_dhcp_client *sd_dhcp_client_unref(sd_dhcp_client *client);
+
+int sd_dhcp_client_new(sd_dhcp_client **ret);