BIO_number_read
unsigned long BIO_number_read(BIO *bio);
LCRYPTO_ALIAS(BIO_number_read);
LCRYPTO_USED(BIO_number_read);
BIO_printf(bio_err, "bytes read :%8ld\n", BIO_number_read(in));
BIO_number_read(SSL_get_rbio(s)),