void uclient_disconnect(struct uclient *cl);
int uclient_read(struct uclient *cl, char *buf, int len);
-int uclient_write(struct uclient *cl, char *buf, int len);
+int uclient_write(struct uclient *cl, const char *buf, int len);
int uclient_request(struct uclient *cl);
char *uclient_get_addr(char *dest, int *port, union uclient_addr *a);