extern struct timeval utcp_timeout(struct utcp *utcp);
extern void utcp_set_recv_cb(struct utcp_connection *connection, utcp_recv_t recv);
extern void utcp_set_poll_cb(struct utcp_connection *connection, utcp_poll_t poll);
extern struct timeval utcp_timeout(struct utcp *utcp);
extern void utcp_set_recv_cb(struct utcp_connection *connection, utcp_recv_t recv);
extern void utcp_set_poll_cb(struct utcp_connection *connection, utcp_poll_t poll);