ssize_t net_read(int, void *, size_t, int);
ssize_t net_read_fillbuf(int, int, void *, size_t);
void show_stat_info(char *a, char *b);
ssize_t net_read(int, void *, size_t, int);
ssize_t net_read_fillbuf(int, int, void *, size_t);
void show_stat_info(char *a, char *b);