int (*create) (BIO *);
int (*destroy) (BIO *);
long (*callback_ctrl) (BIO *, int, BIO_info_cb *);
+ int (*bsendmmsg) (BIO *, BIO_MSG *, size_t, size_t, uint64_t, size_t *);
+ int (*brecvmmsg) (BIO *, BIO_MSG *, size_t, size_t, uint64_t, size_t *);
};
void bio_free_ex_data(BIO *bio);