int sd_dhcp_client_new(sd_dhcp_client **ret);
int sd_dhcp_client_attach_event(sd_dhcp_client *client, sd_event *event, int priority);
int sd_dhcp_client_new(sd_dhcp_client **ret);
int sd_dhcp_client_attach_event(sd_dhcp_client *client, sd_event *event, int priority);