-int sd_dhcp_client_set_mac(sd_dhcp_client *client,
- const struct ether_addr *addr);
+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_client_id(sd_dhcp_client *client, uint8_t type,
+ const uint8_t *data, size_t data_len);
+int sd_dhcp_client_get_client_id(sd_dhcp_client *client, uint8_t *type,
+ const uint8_t **data, size_t *data_len);
+int sd_dhcp_client_set_mtu(sd_dhcp_client *client, uint32_t mtu);