int get_socket(void);
void init_sockaddr(struct sockaddr_in*, int, const struct hostent*);
int para_connect(int, struct sockaddr_in *);
int send_buffer(int, const char *);
int send_bin_buffer(int, const char *, size_t);
int send_va_buffer(int, const char *, ...);
int get_socket(void);
void init_sockaddr(struct sockaddr_in*, int, const struct hostent*);
int para_connect(int, struct sockaddr_in *);
int send_buffer(int, const char *);
int send_bin_buffer(int, const char *, size_t);
int send_va_buffer(int, const char *, ...);