int BIO_socket_nbio(int fd,int mode);
int BIO_get_port(const char *str, unsigned short *port_ptr);
int BIO_get_host_ip(const char *str, unsigned char *ip);
int BIO_socket_nbio(int fd,int mode);
int BIO_get_port(const char *str, unsigned short *port_ptr);
int BIO_get_host_ip(const char *str, unsigned char *ip);