int sd_dhcp_server_attach_event(sd_dhcp_server *client, sd_event *event, int priority);
int sd_dhcp_server_detach_event(sd_dhcp_server *client);
sd_event *sd_dhcp_server_get_event(sd_dhcp_server *client);
int sd_dhcp_server_attach_event(sd_dhcp_server *client, sd_event *event, int priority);
int sd_dhcp_server_detach_event(sd_dhcp_server *client);
sd_event *sd_dhcp_server_get_event(sd_dhcp_server *client);