void connection_destroy(struct connection *co);
struct connection *connection_create(struct client *cl);
void connect_resolver_host(struct host *host);
-int connection_send_apdu(struct connection *co, Z_APDU *a);
struct host *connection_get_host(struct connection *con);
void connection_set_authentication(struct connection *co, char *auth);
int connection_connect(struct connection *con);