BIO_C_GET_CONNECT
case BIO_C_GET_CONNECT:
case BIO_C_GET_CONNECT:
#define BIO_get_conn_hostname(b) ((const char *)BIO_ptr_ctrl(b, BIO_C_GET_CONNECT, 0))
#define BIO_get_conn_port(b) ((const char *)BIO_ptr_ctrl(b, BIO_C_GET_CONNECT, 1))
#define BIO_get_conn_address(b) ((const BIO_ADDR *)BIO_ptr_ctrl(b, BIO_C_GET_CONNECT, 2))
#define BIO_get_conn_ip_family(b) BIO_ctrl(b, BIO_C_GET_CONNECT, 3, NULL)
#define BIO_get_conn_mode(b) BIO_ctrl(b, BIO_C_GET_CONNECT, 4, NULL)