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 /*
  * WARNING: do not edit!
  * Generated by Makefile from include/openssl/bio.h.in
  *
  * Copyright 1995-2024 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */
 
 
 #ifndef OPENSSL_BIO_H
 # define OPENSSL_BIO_H
 # pragma once
 
 # include <openssl/macros.h>
 # ifndef OPENSSL_NO_DEPRECATED_3_0
 #  define HEADER_BIO_H
 # endif
 
 # include <openssl/e_os2.h>
 
 # ifndef OPENSSL_NO_STDIO
 #  include <stdio.h>
 # endif
 # include <stdarg.h>
 
 # include <openssl/crypto.h>
 # include <openssl/bioerr.h>
 # include <openssl/core.h>
 
 #ifdef  __cplusplus
 extern "C" {
 #endif
 
 /* There are the classes of BIOs */
 # define BIO_TYPE_DESCRIPTOR     0x0100 /* socket, fd, connect or accept */
 # define BIO_TYPE_FILTER         0x0200
 # define BIO_TYPE_SOURCE_SINK    0x0400
 
 /* These are the 'types' of BIOs */
 # define BIO_TYPE_NONE             0
 # define BIO_TYPE_MEM            ( 1|BIO_TYPE_SOURCE_SINK)
 # define BIO_TYPE_FILE           ( 2|BIO_TYPE_SOURCE_SINK)
 
 # define BIO_TYPE_FD             ( 4|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
 # define BIO_TYPE_SOCKET         ( 5|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
 # define BIO_TYPE_NULL           ( 6|BIO_TYPE_SOURCE_SINK)
 # define BIO_TYPE_SSL            ( 7|BIO_TYPE_FILTER)
 # define BIO_TYPE_MD             ( 8|BIO_TYPE_FILTER)
 # define BIO_TYPE_BUFFER         ( 9|BIO_TYPE_FILTER)
 # define BIO_TYPE_CIPHER         (10|BIO_TYPE_FILTER)
 # define BIO_TYPE_BASE64         (11|BIO_TYPE_FILTER)
 # define BIO_TYPE_CONNECT        (12|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
 # define BIO_TYPE_ACCEPT         (13|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
 
 # define BIO_TYPE_NBIO_TEST      (16|BIO_TYPE_FILTER)/* server proxy BIO */
 # define BIO_TYPE_NULL_FILTER    (17|BIO_TYPE_FILTER)
 # define BIO_TYPE_BIO            (19|BIO_TYPE_SOURCE_SINK)/* half a BIO pair */
 # define BIO_TYPE_LINEBUFFER     (20|BIO_TYPE_FILTER)
 # define BIO_TYPE_DGRAM          (21|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
 # define BIO_TYPE_ASN1           (22|BIO_TYPE_FILTER)
 # define BIO_TYPE_COMP           (23|BIO_TYPE_FILTER)
 # ifndef OPENSSL_NO_SCTP
 #  define BIO_TYPE_DGRAM_SCTP    (24|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
 # endif
 # define BIO_TYPE_CORE_TO_PROV   (25|BIO_TYPE_SOURCE_SINK)
 # define BIO_TYPE_DGRAM_PAIR     (26|BIO_TYPE_SOURCE_SINK)
 # define BIO_TYPE_DGRAM_MEM      (27|BIO_TYPE_SOURCE_SINK)
 
 /* Custom type starting index returned by BIO_get_new_index() */
 #define BIO_TYPE_START           128
 /* Custom type maximum index that can be returned by BIO_get_new_index() */
 #define BIO_TYPE_MASK            0xFF
 
 /*
  * BIO_FILENAME_READ|BIO_CLOSE to open or close on free.
  * BIO_set_fp(in,stdin,BIO_NOCLOSE);
  */
 # define BIO_NOCLOSE             0x00
 # define BIO_CLOSE               0x01
 
 /*
  * These are used in the following macros and are passed to BIO_ctrl()
  */
 # define BIO_CTRL_RESET          1/* opt - rewind/zero etc */
 # define BIO_CTRL_EOF            2/* opt - are we at the eof */
 # define BIO_CTRL_INFO           3/* opt - extra tit-bits */
 # define BIO_CTRL_SET            4/* man - set the 'IO' type */
 # define BIO_CTRL_GET            5/* man - get the 'IO' type */
 # define BIO_CTRL_PUSH           6/* opt - internal, used to signify change */
 # define BIO_CTRL_POP            7/* opt - internal, used to signify change */
 # define BIO_CTRL_GET_CLOSE      8/* man - set the 'close' on free */
 # define BIO_CTRL_SET_CLOSE      9/* man - set the 'close' on free */
 # define BIO_CTRL_PENDING        10/* opt - is their more data buffered */
 # define BIO_CTRL_FLUSH          11/* opt - 'flush' buffered output */
 # define BIO_CTRL_DUP            12/* man - extra stuff for 'duped' BIO */
 # define BIO_CTRL_WPENDING       13/* opt - number of bytes still to write */
 # define BIO_CTRL_SET_CALLBACK   14/* opt - set callback function */
 # define BIO_CTRL_GET_CALLBACK   15/* opt - set callback function */
 
 # define BIO_CTRL_PEEK           29/* BIO_f_buffer special */
 # define BIO_CTRL_SET_FILENAME   30/* BIO_s_file special */
 
 /* dgram BIO stuff */
 # define BIO_CTRL_DGRAM_CONNECT       31/* BIO dgram special */
 # define BIO_CTRL_DGRAM_SET_CONNECTED 32/* allow for an externally connected
                                          * socket to be passed in */
 # define BIO_CTRL_DGRAM_SET_RECV_TIMEOUT 33/* setsockopt, essentially */
 # define BIO_CTRL_DGRAM_GET_RECV_TIMEOUT 34/* getsockopt, essentially */
 # define BIO_CTRL_DGRAM_SET_SEND_TIMEOUT 35/* setsockopt, essentially */
 # define BIO_CTRL_DGRAM_GET_SEND_TIMEOUT 36/* getsockopt, essentially */
 
 # define BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP 37/* flag whether the last */
 # define BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP 38/* I/O operation timed out */
 
 /* #ifdef IP_MTU_DISCOVER */
 # define BIO_CTRL_DGRAM_MTU_DISCOVER       39/* set DF bit on egress packets */
 /* #endif */
 
 # define BIO_CTRL_DGRAM_QUERY_MTU          40/* as kernel for current MTU */
 # define BIO_CTRL_DGRAM_GET_FALLBACK_MTU   47
 # define BIO_CTRL_DGRAM_GET_MTU            41/* get cached value for MTU */
 # define BIO_CTRL_DGRAM_SET_MTU            42/* set cached value for MTU.
                                               * want to use this if asking
                                               * the kernel fails */
 
 # define BIO_CTRL_DGRAM_MTU_EXCEEDED       43/* check whether the MTU was
                                               * exceed in the previous write
                                               * operation */
 
 # define BIO_CTRL_DGRAM_GET_PEER           46
 # define BIO_CTRL_DGRAM_SET_PEER           44/* Destination for the data */
 
 # define BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT   45/* Next DTLS handshake timeout
                                               * to adjust socket timeouts */
 # define BIO_CTRL_DGRAM_SET_DONT_FRAG      48
 
 # define BIO_CTRL_DGRAM_GET_MTU_OVERHEAD   49
 
 /* Deliberately outside of OPENSSL_NO_SCTP - used in bss_dgram.c */
 #  define BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE    50
 # ifndef OPENSSL_NO_SCTP
 /* SCTP stuff */
 #  define BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY                51
 #  define BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY               52
 #  define BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD               53
 #  define BIO_CTRL_DGRAM_SCTP_GET_SNDINFO         60
 #  define BIO_CTRL_DGRAM_SCTP_SET_SNDINFO         61
 #  define BIO_CTRL_DGRAM_SCTP_GET_RCVINFO         62
 #  define BIO_CTRL_DGRAM_SCTP_SET_RCVINFO         63
 #  define BIO_CTRL_DGRAM_SCTP_GET_PRINFO                  64
 #  define BIO_CTRL_DGRAM_SCTP_SET_PRINFO                  65
 #  define BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN               70
 # endif
 
 # define BIO_CTRL_DGRAM_SET_PEEK_MODE      71
 
 /*
  * internal BIO:
  * # define BIO_CTRL_SET_KTLS_SEND                 72
  * # define BIO_CTRL_SET_KTLS_SEND_CTRL_MSG        74
  * # define BIO_CTRL_CLEAR_KTLS_CTRL_MSG           75
  */
 
 # define BIO_CTRL_GET_KTLS_SEND                 73
 # define BIO_CTRL_GET_KTLS_RECV                 76
 
 # define BIO_CTRL_DGRAM_SCTP_WAIT_FOR_DRY       77
 # define BIO_CTRL_DGRAM_SCTP_MSG_WAITING        78
 
 /* BIO_f_prefix controls */
 # define BIO_CTRL_SET_PREFIX                    79
 # define BIO_CTRL_SET_INDENT                    80
 # define BIO_CTRL_GET_INDENT                    81
 
 # define BIO_CTRL_DGRAM_GET_LOCAL_ADDR_CAP      82
 # define BIO_CTRL_DGRAM_GET_LOCAL_ADDR_ENABLE   83
 # define BIO_CTRL_DGRAM_SET_LOCAL_ADDR_ENABLE   84
 # define BIO_CTRL_DGRAM_GET_EFFECTIVE_CAPS      85
 # define BIO_CTRL_DGRAM_GET_CAPS                86
 # define BIO_CTRL_DGRAM_SET_CAPS                87
 # define BIO_CTRL_DGRAM_GET_NO_TRUNC            88
 # define BIO_CTRL_DGRAM_SET_NO_TRUNC            89
 
 /*
  * internal BIO:
  * # define BIO_CTRL_SET_KTLS_TX_ZEROCOPY_SENDFILE 90
  */
 
 # define BIO_CTRL_GET_RPOLL_DESCRIPTOR          91
 # define BIO_CTRL_GET_WPOLL_DESCRIPTOR          92
 # define BIO_CTRL_DGRAM_DETECT_PEER_ADDR        93
 
 # define BIO_DGRAM_CAP_NONE                 0U
 # define BIO_DGRAM_CAP_HANDLES_SRC_ADDR     (1U << 0)
 # define BIO_DGRAM_CAP_HANDLES_DST_ADDR     (1U << 1)
 # define BIO_DGRAM_CAP_PROVIDES_SRC_ADDR    (1U << 2)
 # define BIO_DGRAM_CAP_PROVIDES_DST_ADDR    (1U << 3)
 
 # ifndef OPENSSL_NO_KTLS
 #  define BIO_get_ktls_send(b)         \
      (BIO_ctrl(b, BIO_CTRL_GET_KTLS_SEND, 0, NULL) > 0)
 #  define BIO_get_ktls_recv(b)         \
      (BIO_ctrl(b, BIO_CTRL_GET_KTLS_RECV, 0, NULL) > 0)
 # else
 #  define BIO_get_ktls_send(b)  (0)
 #  define BIO_get_ktls_recv(b)  (0)
 # endif
 
 /* modifiers */
 # define BIO_FP_READ             0x02
 # define BIO_FP_WRITE            0x04
 # define BIO_FP_APPEND           0x08
 # define BIO_FP_TEXT             0x10
 
 # define BIO_FLAGS_READ          0x01
 # define BIO_FLAGS_WRITE         0x02
 # define BIO_FLAGS_IO_SPECIAL    0x04
 # define BIO_FLAGS_RWS (BIO_FLAGS_READ|BIO_FLAGS_WRITE|BIO_FLAGS_IO_SPECIAL)
 # define BIO_FLAGS_SHOULD_RETRY  0x08
 # ifndef OPENSSL_NO_DEPRECATED_3_0
 /* This #define was replaced by an internal constant and should not be used. */
 #  define BIO_FLAGS_UPLINK       0
 # endif
 
 # define BIO_FLAGS_BASE64_NO_NL  0x100
 
 /*
  * This is used with memory BIOs:
  * BIO_FLAGS_MEM_RDONLY means we shouldn't free up or change the data in any way;
  * BIO_FLAGS_NONCLEAR_RST means we shouldn't clear data on reset.
  */
 # define BIO_FLAGS_MEM_RDONLY    0x200
 # define BIO_FLAGS_NONCLEAR_RST  0x400
 # define BIO_FLAGS_IN_EOF        0x800
 
 /* the BIO FLAGS values 0x1000 to 0x8000 are reserved for internal KTLS flags */
 
 typedef union bio_addr_st BIO_ADDR;
 typedef struct bio_addrinfo_st BIO_ADDRINFO;
 
 int BIO_get_new_index(void);
 void BIO_set_flags(BIO *b, int flags);
 int BIO_test_flags(const BIO *b, int flags);
 void BIO_clear_flags(BIO *b, int flags);
 
 # define BIO_get_flags(b) BIO_test_flags(b, ~(0x0))
 # define BIO_set_retry_special(b) \
                 BIO_set_flags(b, (BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY))
 # define BIO_set_retry_read(b) \
                 BIO_set_flags(b, (BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY))
 # define BIO_set_retry_write(b) \
                 BIO_set_flags(b, (BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY))
 
 /* These are normally used internally in BIOs */
 # define BIO_clear_retry_flags(b) \
                 BIO_clear_flags(b, (BIO_FLAGS_RWS|BIO_FLAGS_SHOULD_RETRY))
 # define BIO_get_retry_flags(b) \
                 BIO_test_flags(b, (BIO_FLAGS_RWS|BIO_FLAGS_SHOULD_RETRY))
 
 /* These should be used by the application to tell why we should retry */
 # define BIO_should_read(a)              BIO_test_flags(a, BIO_FLAGS_READ)
 # define BIO_should_write(a)             BIO_test_flags(a, BIO_FLAGS_WRITE)
 # define BIO_should_io_special(a)        BIO_test_flags(a, BIO_FLAGS_IO_SPECIAL)
 # define BIO_retry_type(a)               BIO_test_flags(a, BIO_FLAGS_RWS)
 # define BIO_should_retry(a)             BIO_test_flags(a, BIO_FLAGS_SHOULD_RETRY)
 
 /*
  * The next three are used in conjunction with the BIO_should_io_special()
  * condition.  After this returns true, BIO *BIO_get_retry_BIO(BIO *bio, int
  * *reason); will walk the BIO stack and return the 'reason' for the special
  * and the offending BIO. Given a BIO, BIO_get_retry_reason(bio) will return
  * the code.
  */
 /*
  * Returned from the SSL bio when the certificate retrieval code had an error
  */
 # define BIO_RR_SSL_X509_LOOKUP          0x01
 /* Returned from the connect BIO when a connect would have blocked */
 # define BIO_RR_CONNECT                  0x02
 /* Returned from the accept BIO when an accept would have blocked */
 # define BIO_RR_ACCEPT                   0x03
 
 /* These are passed by the BIO callback */
 # define BIO_CB_FREE        0x01
 # define BIO_CB_READ        0x02
 # define BIO_CB_WRITE       0x03
 # define BIO_CB_PUTS        0x04
 # define BIO_CB_GETS        0x05
 # define BIO_CB_CTRL        0x06
 # define BIO_CB_RECVMMSG    0x07
 # define BIO_CB_SENDMMSG    0x08
 
 /*
  * The callback is called before and after the underling operation, The
  * BIO_CB_RETURN flag indicates if it is after the call
  */
 # define BIO_CB_RETURN   0x80
 # define BIO_CB_return(a) ((a)|BIO_CB_RETURN)
 # define BIO_cb_pre(a)   (!((a)&BIO_CB_RETURN))
 # define BIO_cb_post(a)  ((a)&BIO_CB_RETURN)
 
 # ifndef OPENSSL_NO_DEPRECATED_3_0
 typedef long (*BIO_callback_fn)(BIO *b, int oper, const char *argp, int argi,
                                 long argl, long ret);
 OSSL_DEPRECATEDIN_3_0 BIO_callback_fn BIO_get_callback(const BIO *b);
 OSSL_DEPRECATEDIN_3_0 void BIO_set_callback(BIO *b, BIO_callback_fn callback);
 OSSL_DEPRECATEDIN_3_0 long BIO_debug_callback(BIO *bio, int cmd,
                                                const char *argp, int argi,
                                                long argl, long ret);
 # endif
 
 typedef long (*BIO_callback_fn_ex)(BIO *b, int oper, const char *argp,
                                    size_t len, int argi,
                                    long argl, int ret, size_t *processed);
 BIO_callback_fn_ex BIO_get_callback_ex(const BIO *b);
 void BIO_set_callback_ex(BIO *b, BIO_callback_fn_ex callback);
 long BIO_debug_callback_ex(BIO *bio, int oper, const char *argp, size_t len,
                            int argi, long argl, int ret, size_t *processed);
 
 char *BIO_get_callback_arg(const BIO *b);
 void BIO_set_callback_arg(BIO *b, char *arg);
 
 typedef struct bio_method_st BIO_METHOD;
 
 const char *BIO_method_name(const BIO *b);
 int BIO_method_type(const BIO *b);
 
 typedef int BIO_info_cb(BIO *, int, int);
 typedef BIO_info_cb bio_info_cb;  /* backward compatibility */
 
 SKM_DEFINE_STACK_OF_INTERNAL(BIO, BIO, BIO)
 #define sk_BIO_num(sk) OPENSSL_sk_num(ossl_check_const_BIO_sk_type(sk))
 #define sk_BIO_value(sk, idx) ((BIO *)OPENSSL_sk_value(ossl_check_const_BIO_sk_type(sk), (idx)))
 #define sk_BIO_new(cmp) ((STACK_OF(BIO) *)OPENSSL_sk_new(ossl_check_BIO_compfunc_type(cmp)))
 #define sk_BIO_new_null() ((STACK_OF(BIO) *)OPENSSL_sk_new_null())
 #define sk_BIO_new_reserve(cmp, n) ((STACK_OF(BIO) *)OPENSSL_sk_new_reserve(ossl_check_BIO_compfunc_type(cmp), (n)))
 #define sk_BIO_reserve(sk, n) OPENSSL_sk_reserve(ossl_check_BIO_sk_type(sk), (n))
 #define sk_BIO_free(sk) OPENSSL_sk_free(ossl_check_BIO_sk_type(sk))
 #define sk_BIO_zero(sk) OPENSSL_sk_zero(ossl_check_BIO_sk_type(sk))
 #define sk_BIO_delete(sk, i) ((BIO *)OPENSSL_sk_delete(ossl_check_BIO_sk_type(sk), (i)))
 #define sk_BIO_delete_ptr(sk, ptr) ((BIO *)OPENSSL_sk_delete_ptr(ossl_check_BIO_sk_type(sk), ossl_check_BIO_type(ptr)))
 #define sk_BIO_push(sk, ptr) OPENSSL_sk_push(ossl_check_BIO_sk_type(sk), ossl_check_BIO_type(ptr))
 #define sk_BIO_unshift(sk, ptr) OPENSSL_sk_unshift(ossl_check_BIO_sk_type(sk), ossl_check_BIO_type(ptr))
 #define sk_BIO_pop(sk) ((BIO *)OPENSSL_sk_pop(ossl_check_BIO_sk_type(sk)))
 #define sk_BIO_shift(sk) ((BIO *)OPENSSL_sk_shift(ossl_check_BIO_sk_type(sk)))
 #define sk_BIO_pop_free(sk, freefunc) OPENSSL_sk_pop_free(ossl_check_BIO_sk_type(sk),ossl_check_BIO_freefunc_type(freefunc))
 #define sk_BIO_insert(sk, ptr, idx) OPENSSL_sk_insert(ossl_check_BIO_sk_type(sk), ossl_check_BIO_type(ptr), (idx))
 #define sk_BIO_set(sk, idx, ptr) ((BIO *)OPENSSL_sk_set(ossl_check_BIO_sk_type(sk), (idx), ossl_check_BIO_type(ptr)))
 #define sk_BIO_find(sk, ptr) OPENSSL_sk_find(ossl_check_BIO_sk_type(sk), ossl_check_BIO_type(ptr))
 #define sk_BIO_find_ex(sk, ptr) OPENSSL_sk_find_ex(ossl_check_BIO_sk_type(sk), ossl_check_BIO_type(ptr))
 #define sk_BIO_find_all(sk, ptr, pnum) OPENSSL_sk_find_all(ossl_check_BIO_sk_type(sk), ossl_check_BIO_type(ptr), pnum)
 #define sk_BIO_sort(sk) OPENSSL_sk_sort(ossl_check_BIO_sk_type(sk))
 #define sk_BIO_is_sorted(sk) OPENSSL_sk_is_sorted(ossl_check_const_BIO_sk_type(sk))
 #define sk_BIO_dup(sk) ((STACK_OF(BIO) *)OPENSSL_sk_dup(ossl_check_const_BIO_sk_type(sk)))
 #define sk_BIO_deep_copy(sk, copyfunc, freefunc) ((STACK_OF(BIO) *)OPENSSL_sk_deep_copy(ossl_check_const_BIO_sk_type(sk), ossl_check_BIO_copyfunc_type(copyfunc), ossl_check_BIO_freefunc_type(freefunc)))
 #define sk_BIO_set_cmp_func(sk, cmp) ((sk_BIO_compfunc)OPENSSL_sk_set_cmp_func(ossl_check_BIO_sk_type(sk), ossl_check_BIO_compfunc_type(cmp)))
 
 
 
 /* Prefix and suffix callback in ASN1 BIO */
 typedef int asn1_ps_func (BIO *b, unsigned char **pbuf, int *plen,
                           void *parg);
 
 typedef void (*BIO_dgram_sctp_notification_handler_fn) (BIO *b,
                                                         void *context,
                                                         void *buf);
 # ifndef OPENSSL_NO_SCTP
 /* SCTP parameter structs */
 struct bio_dgram_sctp_sndinfo {
     uint16_t snd_sid;
     uint16_t snd_flags;
     uint32_t snd_ppid;
     uint32_t snd_context;
 };
 
 struct bio_dgram_sctp_rcvinfo {
     uint16_t rcv_sid;
     uint16_t rcv_ssn;
     uint16_t rcv_flags;
     uint32_t rcv_ppid;
     uint32_t rcv_tsn;
     uint32_t rcv_cumtsn;
     uint32_t rcv_context;
 };
 
 struct bio_dgram_sctp_prinfo {
     uint16_t pr_policy;
     uint32_t pr_value;
 };
 # endif
 
 /* BIO_sendmmsg/BIO_recvmmsg-related definitions */
 typedef struct bio_msg_st {
     void *data;
     size_t data_len;
     BIO_ADDR *peer, *local;
     uint64_t flags;
 } BIO_MSG;
 
 typedef struct bio_mmsg_cb_args_st {
     BIO_MSG    *msg;
     size_t      stride, num_msg;
     uint64_t    flags;
     size_t     *msgs_processed;
 } BIO_MMSG_CB_ARGS;
 
 #define BIO_POLL_DESCRIPTOR_TYPE_NONE       0
 #define BIO_POLL_DESCRIPTOR_TYPE_SOCK_FD    1
 #define BIO_POLL_DESCRIPTOR_TYPE_SSL        2
 #define BIO_POLL_DESCRIPTOR_CUSTOM_START    8192
 
 typedef struct bio_poll_descriptor_st {
     uint32_t type;
     union {
         int         fd;
         void        *custom;
         uintptr_t   custom_ui;
         SSL         *ssl;
     } value;
 } BIO_POLL_DESCRIPTOR;
 
 /*
  * #define BIO_CONN_get_param_hostname BIO_ctrl
  */
 
 # define BIO_C_SET_CONNECT                       100
 # define BIO_C_DO_STATE_MACHINE                  101
 # define BIO_C_SET_NBIO                          102
 /* # define BIO_C_SET_PROXY_PARAM                   103 */
 # define BIO_C_SET_FD                            104
 # define BIO_C_GET_FD                            105
 # define BIO_C_SET_FILE_PTR                      106
 # define BIO_C_GET_FILE_PTR                      107
 # define BIO_C_SET_FILENAME                      108
 # define BIO_C_SET_SSL                           109
 # define BIO_C_GET_SSL                           110
 # define BIO_C_SET_MD                            111
 # define BIO_C_GET_MD                            112
 # define BIO_C_GET_CIPHER_STATUS                 113
 # define BIO_C_SET_BUF_MEM                       114
 # define BIO_C_GET_BUF_MEM_PTR                   115
 # define BIO_C_GET_BUFF_NUM_LINES                116
 # define BIO_C_SET_BUFF_SIZE                     117
 # define BIO_C_SET_ACCEPT                        118
 # define BIO_C_SSL_MODE                          119
 # define BIO_C_GET_MD_CTX                        120
 /* # define BIO_C_GET_PROXY_PARAM                   121 */
 # define BIO_C_SET_BUFF_READ_DATA                122/* data to read first */
 # define BIO_C_GET_CONNECT                       123
 # define BIO_C_GET_ACCEPT                        124
 # define BIO_C_SET_SSL_RENEGOTIATE_BYTES         125
 # define BIO_C_GET_SSL_NUM_RENEGOTIATES          126
 # define BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT       127
 # define BIO_C_FILE_SEEK                         128
 # define BIO_C_GET_CIPHER_CTX                    129
 # define BIO_C_SET_BUF_MEM_EOF_RETURN            130/* return end of input
                                                      * value */
 # define BIO_C_SET_BIND_MODE                     131
 # define BIO_C_GET_BIND_MODE                     132
 # define BIO_C_FILE_TELL                         133
 # define BIO_C_GET_SOCKS                         134
 # define BIO_C_SET_SOCKS                         135
 
 # define BIO_C_SET_WRITE_BUF_SIZE                136/* for BIO_s_bio */
 # define BIO_C_GET_WRITE_BUF_SIZE                137
 # define BIO_C_MAKE_BIO_PAIR                     138
 # define BIO_C_DESTROY_BIO_PAIR                  139
 # define BIO_C_GET_WRITE_GUARANTEE               140
 # define BIO_C_GET_READ_REQUEST                  141
 # define BIO_C_SHUTDOWN_WR                       142
 # define BIO_C_NREAD0                            143
 # define BIO_C_NREAD                             144
 # define BIO_C_NWRITE0                           145
 # define BIO_C_NWRITE                            146
 # define BIO_C_RESET_READ_REQUEST                147
 # define BIO_C_SET_MD_CTX                        148
 
 # define BIO_C_SET_PREFIX                        149
 # define BIO_C_GET_PREFIX                        150
 # define BIO_C_SET_SUFFIX                        151
 # define BIO_C_GET_SUFFIX                        152
 
 # define BIO_C_SET_EX_ARG                        153
 # define BIO_C_GET_EX_ARG                        154
 
 # define BIO_C_SET_CONNECT_MODE                  155
 
 # define BIO_C_SET_TFO                           156 /* like BIO_C_SET_NBIO */
 
 # define BIO_C_SET_SOCK_TYPE                     157
 # define BIO_C_GET_SOCK_TYPE                     158
 # define BIO_C_GET_DGRAM_BIO                     159
 
 # define BIO_set_app_data(s,arg)         BIO_set_ex_data(s,0,arg)
 # define BIO_get_app_data(s)             BIO_get_ex_data(s,0)
 
 # define BIO_set_nbio(b,n)               BIO_ctrl(b,BIO_C_SET_NBIO,(n),NULL)
 # define BIO_set_tfo(b,n)                BIO_ctrl(b,BIO_C_SET_TFO,(n),NULL)
 
 # ifndef OPENSSL_NO_SOCK
 /* IP families we support, for BIO_s_connect() and BIO_s_accept() */
 /* Note: the underlying operating system may not support some of them */
 #  define BIO_FAMILY_IPV4                         4
 #  define BIO_FAMILY_IPV6                         6
 #  define BIO_FAMILY_IPANY                        256
 
 /* BIO_s_connect() */
 #  define BIO_set_conn_hostname(b,name) BIO_ctrl(b,BIO_C_SET_CONNECT,0, \
                                                  (char *)(name))
 #  define BIO_set_conn_port(b,port)     BIO_ctrl(b,BIO_C_SET_CONNECT,1, \
                                                  (char *)(port))
 #  define BIO_set_conn_address(b,addr)  BIO_ctrl(b,BIO_C_SET_CONNECT,2, \
                                                  (char *)(addr))
 #  define BIO_set_conn_ip_family(b,f)   BIO_int_ctrl(b,BIO_C_SET_CONNECT,3,f)
 #  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)
 #  define BIO_set_conn_mode(b,n)        BIO_ctrl(b,BIO_C_SET_CONNECT_MODE,(n),NULL)
 #  define BIO_set_sock_type(b,t)        BIO_ctrl(b,BIO_C_SET_SOCK_TYPE,(t),NULL)
 #  define BIO_get_sock_type(b)          BIO_ctrl(b,BIO_C_GET_SOCK_TYPE,0,NULL)
 #  define BIO_get0_dgram_bio(b, p)      BIO_ctrl(b,BIO_C_GET_DGRAM_BIO,0,(void *)(BIO **)(p))
 
 /* BIO_s_accept() */
 #  define BIO_set_accept_name(b,name)   BIO_ctrl(b,BIO_C_SET_ACCEPT,0, \
                                                  (char *)(name))
 #  define BIO_set_accept_port(b,port)   BIO_ctrl(b,BIO_C_SET_ACCEPT,1, \
                                                  (char *)(port))
 #  define BIO_get_accept_name(b)        ((const char *)BIO_ptr_ctrl(b,BIO_C_GET_ACCEPT,0))
 #  define BIO_get_accept_port(b)        ((const char *)BIO_ptr_ctrl(b,BIO_C_GET_ACCEPT,1))
 #  define BIO_get_peer_name(b)          ((const char *)BIO_ptr_ctrl(b,BIO_C_GET_ACCEPT,2))
 #  define BIO_get_peer_port(b)          ((const char *)BIO_ptr_ctrl(b,BIO_C_GET_ACCEPT,3))
 /* #define BIO_set_nbio(b,n)    BIO_ctrl(b,BIO_C_SET_NBIO,(n),NULL) */
 #  define BIO_set_nbio_accept(b,n)      BIO_ctrl(b,BIO_C_SET_ACCEPT,2,(n)?(void *)"a":NULL)
 #  define BIO_set_accept_bios(b,bio)    BIO_ctrl(b,BIO_C_SET_ACCEPT,3, \
                                                  (char *)(bio))
 #  define BIO_set_accept_ip_family(b,f) BIO_int_ctrl(b,BIO_C_SET_ACCEPT,4,f)
 #  define BIO_get_accept_ip_family(b)   BIO_ctrl(b,BIO_C_GET_ACCEPT,4,NULL)
 #  define BIO_set_tfo_accept(b,n)       BIO_ctrl(b,BIO_C_SET_ACCEPT,5,(n)?(void *)"a":NULL)
 
 /* Aliases kept for backward compatibility */
 #  define BIO_BIND_NORMAL                 0
 #  define BIO_BIND_REUSEADDR              BIO_SOCK_REUSEADDR
 #  define BIO_BIND_REUSEADDR_IF_UNUSED    BIO_SOCK_REUSEADDR
 #  define BIO_set_bind_mode(b,mode) BIO_ctrl(b,BIO_C_SET_BIND_MODE,mode,NULL)
 #  define BIO_get_bind_mode(b)    BIO_ctrl(b,BIO_C_GET_BIND_MODE,0,NULL)
 # endif /* OPENSSL_NO_SOCK */
 
 # define BIO_do_connect(b)       BIO_do_handshake(b)
 # define BIO_do_accept(b)        BIO_do_handshake(b)
 
 # define BIO_do_handshake(b)     BIO_ctrl(b,BIO_C_DO_STATE_MACHINE,0,NULL)
 
 /* BIO_s_datagram(), BIO_s_fd(), BIO_s_socket(), BIO_s_accept() and BIO_s_connect() */
 # define BIO_set_fd(b,fd,c)      BIO_int_ctrl(b,BIO_C_SET_FD,c,fd)
 # define BIO_get_fd(b,c)         BIO_ctrl(b,BIO_C_GET_FD,0,(char *)(c))
 
 /* BIO_s_file() */
 # define BIO_set_fp(b,fp,c)      BIO_ctrl(b,BIO_C_SET_FILE_PTR,c,(char *)(fp))
 # define BIO_get_fp(b,fpp)       BIO_ctrl(b,BIO_C_GET_FILE_PTR,0,(char *)(fpp))
 
 /* BIO_s_fd() and BIO_s_file() */
 # define BIO_seek(b,ofs) (int)BIO_ctrl(b,BIO_C_FILE_SEEK,ofs,NULL)
 # define BIO_tell(b)     (int)BIO_ctrl(b,BIO_C_FILE_TELL,0,NULL)
 
 /*
  * name is cast to lose const, but might be better to route through a
  * function so we can do it safely
  */
 # ifdef CONST_STRICT
 /*
  * If you are wondering why this isn't defined, its because CONST_STRICT is
  * purely a compile-time kludge to allow const to be checked.
  */
 int BIO_read_filename(BIO *b, const char *name);
 # else
 #  define BIO_read_filename(b,name) (int)BIO_ctrl(b,BIO_C_SET_FILENAME, \
                 BIO_CLOSE|BIO_FP_READ,(char *)(name))
 # endif
 # define BIO_write_filename(b,name) (int)BIO_ctrl(b,BIO_C_SET_FILENAME, \
                 BIO_CLOSE|BIO_FP_WRITE,name)
 # define BIO_append_filename(b,name) (int)BIO_ctrl(b,BIO_C_SET_FILENAME, \
                 BIO_CLOSE|BIO_FP_APPEND,name)
 # define BIO_rw_filename(b,name) (int)BIO_ctrl(b,BIO_C_SET_FILENAME, \
                 BIO_CLOSE|BIO_FP_READ|BIO_FP_WRITE,name)
 
 /*
  * WARNING WARNING, this ups the reference count on the read bio of the SSL
  * structure.  This is because the ssl read BIO is now pointed to by the
  * next_bio field in the bio.  So when you free the BIO, make sure you are
  * doing a BIO_free_all() to catch the underlying BIO.
  */
 # define BIO_set_ssl(b,ssl,c)    BIO_ctrl(b,BIO_C_SET_SSL,c,(char *)(ssl))
 # define BIO_get_ssl(b,sslp)     BIO_ctrl(b,BIO_C_GET_SSL,0,(char *)(sslp))
 # define BIO_set_ssl_mode(b,client)      BIO_ctrl(b,BIO_C_SSL_MODE,client,NULL)
 # define BIO_set_ssl_renegotiate_bytes(b,num) \
         BIO_ctrl(b,BIO_C_SET_SSL_RENEGOTIATE_BYTES,num,NULL)
 # define BIO_get_num_renegotiates(b) \
         BIO_ctrl(b,BIO_C_GET_SSL_NUM_RENEGOTIATES,0,NULL)
 # define BIO_set_ssl_renegotiate_timeout(b,seconds) \
         BIO_ctrl(b,BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT,seconds,NULL)
 
 /* defined in evp.h */
 /* #define BIO_set_md(b,md)     BIO_ctrl(b,BIO_C_SET_MD,1,(char *)(md)) */
 
 # define BIO_get_mem_data(b,pp)  BIO_ctrl(b,BIO_CTRL_INFO,0,(char *)(pp))
 # define BIO_set_mem_buf(b,bm,c) BIO_ctrl(b,BIO_C_SET_BUF_MEM,c,(char *)(bm))
 # define BIO_get_mem_ptr(b,pp)   BIO_ctrl(b,BIO_C_GET_BUF_MEM_PTR,0, \
                                           (char *)(pp))
 # define BIO_set_mem_eof_return(b,v) \
                                 BIO_ctrl(b,BIO_C_SET_BUF_MEM_EOF_RETURN,v,NULL)
 
 /* For the BIO_f_buffer() type */
 # define BIO_get_buffer_num_lines(b)     BIO_ctrl(b,BIO_C_GET_BUFF_NUM_LINES,0,NULL)
 # define BIO_set_buffer_size(b,size)     BIO_ctrl(b,BIO_C_SET_BUFF_SIZE,size,NULL)
 # define BIO_set_read_buffer_size(b,size) BIO_int_ctrl(b,BIO_C_SET_BUFF_SIZE,size,0)
 # define BIO_set_write_buffer_size(b,size) BIO_int_ctrl(b,BIO_C_SET_BUFF_SIZE,size,1)
 # define BIO_set_buffer_read_data(b,buf,num) BIO_ctrl(b,BIO_C_SET_BUFF_READ_DATA,num,buf)
 
 /* Don't use the next one unless you know what you are doing :-) */
 # define BIO_dup_state(b,ret)    BIO_ctrl(b,BIO_CTRL_DUP,0,(char *)(ret))
 
 # define BIO_reset(b)            (int)BIO_ctrl(b,BIO_CTRL_RESET,0,NULL)
 # define BIO_eof(b)              (int)BIO_ctrl(b,BIO_CTRL_EOF,0,NULL)
 # define BIO_set_close(b,c)      (int)BIO_ctrl(b,BIO_CTRL_SET_CLOSE,(c),NULL)
 # define BIO_get_close(b)        (int)BIO_ctrl(b,BIO_CTRL_GET_CLOSE,0,NULL)
 # define BIO_pending(b)          (int)BIO_ctrl(b,BIO_CTRL_PENDING,0,NULL)
 # define BIO_wpending(b)         (int)BIO_ctrl(b,BIO_CTRL_WPENDING,0,NULL)
 /* ...pending macros have inappropriate return type */
 size_t BIO_ctrl_pending(BIO *b);
 size_t BIO_ctrl_wpending(BIO *b);
 # define BIO_flush(b)            (int)BIO_ctrl(b,BIO_CTRL_FLUSH,0,NULL)
 # define BIO_get_info_callback(b,cbp) (int)BIO_ctrl(b,BIO_CTRL_GET_CALLBACK,0, \
                                                    cbp)
 # define BIO_set_info_callback(b,cb) (int)BIO_callback_ctrl(b,BIO_CTRL_SET_CALLBACK,cb)
 
 /* For the BIO_f_buffer() type */
 # define BIO_buffer_get_num_lines(b) BIO_ctrl(b,BIO_CTRL_GET,0,NULL)
 # define BIO_buffer_peek(b,s,l) BIO_ctrl(b,BIO_CTRL_PEEK,(l),(s))
 
 /* For BIO_s_bio() */
 # define BIO_set_write_buf_size(b,size) (int)BIO_ctrl(b,BIO_C_SET_WRITE_BUF_SIZE,size,NULL)
 # define BIO_get_write_buf_size(b,size) (size_t)BIO_ctrl(b,BIO_C_GET_WRITE_BUF_SIZE,size,NULL)
 # define BIO_make_bio_pair(b1,b2)   (int)BIO_ctrl(b1,BIO_C_MAKE_BIO_PAIR,0,b2)
 # define BIO_destroy_bio_pair(b)    (int)BIO_ctrl(b,BIO_C_DESTROY_BIO_PAIR,0,NULL)
 # define BIO_shutdown_wr(b) (int)BIO_ctrl(b, BIO_C_SHUTDOWN_WR, 0, NULL)
 /* macros with inappropriate type -- but ...pending macros use int too: */
 # define BIO_get_write_guarantee(b) (int)BIO_ctrl(b,BIO_C_GET_WRITE_GUARANTEE,0,NULL)
 # define BIO_get_read_request(b)    (int)BIO_ctrl(b,BIO_C_GET_READ_REQUEST,0,NULL)
 size_t BIO_ctrl_get_write_guarantee(BIO *b);
 size_t BIO_ctrl_get_read_request(BIO *b);
 int BIO_ctrl_reset_read_request(BIO *b);
 
 /* ctrl macros for dgram */
 # define BIO_ctrl_dgram_connect(b,peer)  \
                      (int)BIO_ctrl(b,BIO_CTRL_DGRAM_CONNECT,0, (char *)(peer))
 # define BIO_ctrl_set_connected(b,peer) \
          (int)BIO_ctrl(b, BIO_CTRL_DGRAM_SET_CONNECTED, 0, (char *)(peer))
 # define BIO_dgram_recv_timedout(b) \
          (int)BIO_ctrl(b, BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP, 0, NULL)
 # define BIO_dgram_send_timedout(b) \
          (int)BIO_ctrl(b, BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP, 0, NULL)
 # define BIO_dgram_get_peer(b,peer) \
          (int)BIO_ctrl(b, BIO_CTRL_DGRAM_GET_PEER, 0, (char *)(peer))
 # define BIO_dgram_set_peer(b,peer) \
          (int)BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, (char *)(peer))
 # define BIO_dgram_detect_peer_addr(b,peer) \
          (int)BIO_ctrl(b, BIO_CTRL_DGRAM_DETECT_PEER_ADDR, 0, (char *)(peer))
 # define BIO_dgram_get_mtu_overhead(b) \
          (unsigned int)BIO_ctrl((b), BIO_CTRL_DGRAM_GET_MTU_OVERHEAD, 0, NULL)
 # define BIO_dgram_get_local_addr_cap(b) \
          (int)BIO_ctrl((b), BIO_CTRL_DGRAM_GET_LOCAL_ADDR_CAP, 0, NULL)
 # define BIO_dgram_get_local_addr_enable(b, penable) \
          (int)BIO_ctrl((b), BIO_CTRL_DGRAM_GET_LOCAL_ADDR_ENABLE, 0, (char *)(penable))
 # define BIO_dgram_set_local_addr_enable(b, enable) \
          (int)BIO_ctrl((b), BIO_CTRL_DGRAM_SET_LOCAL_ADDR_ENABLE, (enable), NULL)
 # define BIO_dgram_get_effective_caps(b) \
          (uint32_t)BIO_ctrl((b), BIO_CTRL_DGRAM_GET_EFFECTIVE_CAPS, 0, NULL)
 # define BIO_dgram_get_caps(b) \
          (uint32_t)BIO_ctrl((b), BIO_CTRL_DGRAM_GET_CAPS, 0, NULL)
 # define BIO_dgram_set_caps(b, caps) \
          (int)BIO_ctrl((b), BIO_CTRL_DGRAM_SET_CAPS, (long)(caps), NULL)
 # define BIO_dgram_get_no_trunc(b) \
          (unsigned int)BIO_ctrl((b), BIO_CTRL_DGRAM_GET_NO_TRUNC, 0, NULL)
 # define BIO_dgram_set_no_trunc(b, enable) \
          (int)BIO_ctrl((b), BIO_CTRL_DGRAM_SET_NO_TRUNC, (enable), NULL)
 # define BIO_dgram_get_mtu(b) \
          (unsigned int)BIO_ctrl((b), BIO_CTRL_DGRAM_GET_MTU, 0, NULL)
 # define BIO_dgram_set_mtu(b, mtu) \
          (int)BIO_ctrl((b), BIO_CTRL_DGRAM_SET_MTU, (mtu), NULL)
 
 /* ctrl macros for BIO_f_prefix */
 # define BIO_set_prefix(b,p) BIO_ctrl((b), BIO_CTRL_SET_PREFIX, 0, (void *)(p))
 # define BIO_set_indent(b,i) BIO_ctrl((b), BIO_CTRL_SET_INDENT, (i), NULL)
 # define BIO_get_indent(b) BIO_ctrl((b), BIO_CTRL_GET_INDENT, 0, NULL)
 
 #define BIO_get_ex_new_index(l, p, newf, dupf, freef) \
     CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, l, p, newf, dupf, freef)
 int BIO_set_ex_data(BIO *bio, int idx, void *data);
 void *BIO_get_ex_data(const BIO *bio, int idx);
 uint64_t BIO_number_read(BIO *bio);
 uint64_t BIO_number_written(BIO *bio);
 
 /* For BIO_f_asn1() */
 int BIO_asn1_set_prefix(BIO *b, asn1_ps_func *prefix,
                         asn1_ps_func *prefix_free);
 int BIO_asn1_get_prefix(BIO *b, asn1_ps_func **pprefix,
                         asn1_ps_func **pprefix_free);
 int BIO_asn1_set_suffix(BIO *b, asn1_ps_func *suffix,
                         asn1_ps_func *suffix_free);
 int BIO_asn1_get_suffix(BIO *b, asn1_ps_func **psuffix,
                         asn1_ps_func **psuffix_free);
 
 const BIO_METHOD *BIO_s_file(void);
 BIO *BIO_new_file(const char *filename, const char *mode);
 BIO *BIO_new_from_core_bio(OSSL_LIB_CTX *libctx, OSSL_CORE_BIO *corebio);
 # ifndef OPENSSL_NO_STDIO
 BIO *BIO_new_fp(FILE *stream, int close_flag);
 # endif
 BIO *BIO_new_ex(OSSL_LIB_CTX *libctx, const BIO_METHOD *method);
 BIO *BIO_new(const BIO_METHOD *type);
 int BIO_free(BIO *a);
 void BIO_set_data(BIO *a, void *ptr);
 void *BIO_get_data(BIO *a);
 void BIO_set_init(BIO *a, int init);
 int BIO_get_init(BIO *a);
 void BIO_set_shutdown(BIO *a, int shut);
 int BIO_get_shutdown(BIO *a);
 void BIO_vfree(BIO *a);
 int BIO_up_ref(BIO *a);
 int BIO_read(BIO *b, void *data, int dlen);
 int BIO_read_ex(BIO *b, void *data, size_t dlen, size_t *readbytes);
 __owur int BIO_recvmmsg(BIO *b, BIO_MSG *msg,
                         size_t stride, size_t num_msg, uint64_t flags,
                         size_t *msgs_processed);
 int BIO_gets(BIO *bp, char *buf, int size);
 int BIO_get_line(BIO *bio, char *buf, int size);
 int BIO_write(BIO *b, const void *data, int dlen);
 int BIO_write_ex(BIO *b, const void *data, size_t dlen, size_t *written);
 __owur int BIO_sendmmsg(BIO *b, BIO_MSG *msg,
                         size_t stride, size_t num_msg, uint64_t flags,
                         size_t *msgs_processed);
 __owur int BIO_get_rpoll_descriptor(BIO *b, BIO_POLL_DESCRIPTOR *desc);
 __owur int BIO_get_wpoll_descriptor(BIO *b, BIO_POLL_DESCRIPTOR *desc);
 int BIO_puts(BIO *bp, const char *buf);
 int BIO_indent(BIO *b, int indent, int max);
 long BIO_ctrl(BIO *bp, int cmd, long larg, void *parg);
 long BIO_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp);
 void *BIO_ptr_ctrl(BIO *bp, int cmd, long larg);
 long BIO_int_ctrl(BIO *bp, int cmd, long larg, int iarg);
 BIO *BIO_push(BIO *b, BIO *append);
 BIO *BIO_pop(BIO *b);
 void BIO_free_all(BIO *a);
 BIO *BIO_find_type(BIO *b, int bio_type);
 BIO *BIO_next(BIO *b);
 void BIO_set_next(BIO *b, BIO *next);
 BIO *BIO_get_retry_BIO(BIO *bio, int *reason);
 int BIO_get_retry_reason(BIO *bio);
 void BIO_set_retry_reason(BIO *bio, int reason);
 BIO *BIO_dup_chain(BIO *in);
 
 int BIO_nread0(BIO *bio, char **buf);
 int BIO_nread(BIO *bio, char **buf, int num);
 int BIO_nwrite0(BIO *bio, char **buf);
 int BIO_nwrite(BIO *bio, char **buf, int num);
 
 const BIO_METHOD *BIO_s_mem(void);
 # ifndef OPENSSL_NO_DGRAM
 const BIO_METHOD *BIO_s_dgram_mem(void);
 # endif
 const BIO_METHOD *BIO_s_secmem(void);
 BIO *BIO_new_mem_buf(const void *buf, int len);
 # ifndef OPENSSL_NO_SOCK
 const BIO_METHOD *BIO_s_socket(void);
 const BIO_METHOD *BIO_s_connect(void);
 const BIO_METHOD *BIO_s_accept(void);
 # endif
 const BIO_METHOD *BIO_s_fd(void);
 const BIO_METHOD *BIO_s_log(void);
 const BIO_METHOD *BIO_s_bio(void);
 const BIO_METHOD *BIO_s_null(void);
 const BIO_METHOD *BIO_f_null(void);
 const BIO_METHOD *BIO_f_buffer(void);
 const BIO_METHOD *BIO_f_readbuffer(void);
 const BIO_METHOD *BIO_f_linebuffer(void);
 const BIO_METHOD *BIO_f_nbio_test(void);
 const BIO_METHOD *BIO_f_prefix(void);
 const BIO_METHOD *BIO_s_core(void);
 # ifndef OPENSSL_NO_DGRAM
 const BIO_METHOD *BIO_s_dgram_pair(void);
 const BIO_METHOD *BIO_s_datagram(void);
 int BIO_dgram_non_fatal_error(int error);
 BIO *BIO_new_dgram(int fd, int close_flag);
 #  ifndef OPENSSL_NO_SCTP
 const BIO_METHOD *BIO_s_datagram_sctp(void);
 BIO *BIO_new_dgram_sctp(int fd, int close_flag);
 int BIO_dgram_is_sctp(BIO *bio);
 int BIO_dgram_sctp_notification_cb(BIO *b,
                 BIO_dgram_sctp_notification_handler_fn handle_notifications,
                 void *context);
 int BIO_dgram_sctp_wait_for_dry(BIO *b);
 int BIO_dgram_sctp_msg_waiting(BIO *b);
 #  endif
 # endif
 
 # ifndef OPENSSL_NO_SOCK
 int BIO_sock_should_retry(int i);
 int BIO_sock_non_fatal_error(int error);
 int BIO_err_is_non_fatal(unsigned int errcode);
 int BIO_socket_wait(int fd, int for_read, time_t max_time);
 # endif
 int BIO_wait(BIO *bio, time_t max_time, unsigned int nap_milliseconds);
 int BIO_do_connect_retry(BIO *bio, int timeout, int nap_milliseconds);
 
 int BIO_fd_should_retry(int i);
 int BIO_fd_non_fatal_error(int error);
 int BIO_dump_cb(int (*cb) (const void *data, size_t len, void *u),
                 void *u, const void *s, int len);
 int BIO_dump_indent_cb(int (*cb) (const void *data, size_t len, void *u),
                        void *u, const void *s, int len, int indent);
 int BIO_dump(BIO *b, const void *bytes, int len);
 int BIO_dump_indent(BIO *b, const void *bytes, int len, int indent);
 # ifndef OPENSSL_NO_STDIO
 int BIO_dump_fp(FILE *fp, const void *s, int len);
 int BIO_dump_indent_fp(FILE *fp, const void *s, int len, int indent);
 # endif
 int BIO_hex_string(BIO *out, int indent, int width, const void *data,
                    int datalen);
 
 # ifndef OPENSSL_NO_SOCK
 BIO_ADDR *BIO_ADDR_new(void);
 int BIO_ADDR_copy(BIO_ADDR *dst, const BIO_ADDR *src);
 BIO_ADDR *BIO_ADDR_dup(const BIO_ADDR *ap);
 int BIO_ADDR_rawmake(BIO_ADDR *ap, int family,
                      const void *where, size_t wherelen, unsigned short port);
 void BIO_ADDR_free(BIO_ADDR *);
 void BIO_ADDR_clear(BIO_ADDR *ap);
 int BIO_ADDR_family(const BIO_ADDR *ap);
 int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l);
 unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap);
 char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric);
 char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric);
 char *BIO_ADDR_path_string(const BIO_ADDR *ap);
 
 const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai);
 int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai);
 int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai);
 int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai);
 const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai);
 void BIO_ADDRINFO_free(BIO_ADDRINFO *bai);
 
 enum BIO_hostserv_priorities {
     BIO_PARSE_PRIO_HOST, BIO_PARSE_PRIO_SERV
 };
 int BIO_parse_hostserv(const char *hostserv, char **host, char **service,
                        enum BIO_hostserv_priorities hostserv_prio);
 enum BIO_lookup_type {
     BIO_LOOKUP_CLIENT, BIO_LOOKUP_SERVER
 };
 int BIO_lookup(const char *host, const char *service,
                enum BIO_lookup_type lookup_type,
                int family, int socktype, BIO_ADDRINFO **res);
 int BIO_lookup_ex(const char *host, const char *service,
                   int lookup_type, int family, int socktype, int protocol,
                   BIO_ADDRINFO **res);
 int BIO_sock_error(int sock);
 int BIO_socket_ioctl(int fd, long type, void *arg);
 int BIO_socket_nbio(int fd, int mode);
 int BIO_sock_init(void);
 # ifndef OPENSSL_NO_DEPRECATED_1_1_0
 #  define BIO_sock_cleanup() while(0) continue
 # endif
 int BIO_set_tcp_ndelay(int sock, int turn_on);
 # ifndef OPENSSL_NO_DEPRECATED_1_1_0
 OSSL_DEPRECATEDIN_1_1_0 struct hostent *BIO_gethostbyname(const char *name);
 OSSL_DEPRECATEDIN_1_1_0 int BIO_get_port(const char *str, unsigned short *port_ptr);
 OSSL_DEPRECATEDIN_1_1_0 int BIO_get_host_ip(const char *str, unsigned char *ip);
 OSSL_DEPRECATEDIN_1_1_0 int BIO_get_accept_socket(char *host_port, int mode);
 OSSL_DEPRECATEDIN_1_1_0 int BIO_accept(int sock, char **ip_port);
 # endif
 
 union BIO_sock_info_u {
     BIO_ADDR *addr;
 };
 enum BIO_sock_info_type {
     BIO_SOCK_INFO_ADDRESS
 };
 int BIO_sock_info(int sock,
                   enum BIO_sock_info_type type, union BIO_sock_info_u *info);
 
 #  define BIO_SOCK_REUSEADDR    0x01
 #  define BIO_SOCK_V6_ONLY      0x02
 #  define BIO_SOCK_KEEPALIVE    0x04
 #  define BIO_SOCK_NONBLOCK     0x08
 #  define BIO_SOCK_NODELAY      0x10
 #  define BIO_SOCK_TFO          0x20
 
 int BIO_socket(int domain, int socktype, int protocol, int options);
 int BIO_connect(int sock, const BIO_ADDR *addr, int options);
 int BIO_bind(int sock, const BIO_ADDR *addr, int options);
 int BIO_listen(int sock, const BIO_ADDR *addr, int options);
 int BIO_accept_ex(int accept_sock, BIO_ADDR *addr, int options);
 int BIO_closesocket(int sock);
 
 BIO *BIO_new_socket(int sock, int close_flag);
 BIO *BIO_new_connect(const char *host_port);
 BIO *BIO_new_accept(const char *host_port);
 # endif /* OPENSSL_NO_SOCK*/
 
 BIO *BIO_new_fd(int fd, int close_flag);
 
 int BIO_new_bio_pair(BIO **bio1, size_t writebuf1,
                      BIO **bio2, size_t writebuf2);
 # ifndef OPENSSL_NO_DGRAM
 int BIO_new_bio_dgram_pair(BIO **bio1, size_t writebuf1,
                            BIO **bio2, size_t writebuf2);
 # endif
 
 /*
  * If successful, returns 1 and in *bio1, *bio2 two BIO pair endpoints.
  * Otherwise returns 0 and sets *bio1 and *bio2 to NULL. Size 0 uses default
  * value.
  */
 
 void BIO_copy_next_retry(BIO *b);
 
 /*
  * long BIO_ghbn_ctrl(int cmd,int iarg,char *parg);
  */
 
 # define ossl_bio__attr__(x)
 # if defined(__GNUC__) && defined(__STDC_VERSION__) \
     && !defined(__MINGW32__) && !defined(__MINGW64__) \
     && !defined(__APPLE__)
     /*
      * Because we support the 'z' modifier, which made its appearance in C99,
      * we can't use __attribute__ with pre C99 dialects.
      */
 #  if __STDC_VERSION__ >= 199901L
 #   undef ossl_bio__attr__
 #   define ossl_bio__attr__ __attribute__
 #   if __GNUC__*10 + __GNUC_MINOR__ >= 44
 #    define ossl_bio__printf__ __gnu_printf__
 #   else
 #    define ossl_bio__printf__ __printf__
 #   endif
 #  endif
 # endif
 int BIO_printf(BIO *bio, const char *format, ...)
 ossl_bio__attr__((__format__(ossl_bio__printf__, 2, 3)));
 int BIO_vprintf(BIO *bio, const char *format, va_list args)
 ossl_bio__attr__((__format__(ossl_bio__printf__, 2, 0)));
 int BIO_snprintf(char *buf, size_t n, const char *format, ...)
 ossl_bio__attr__((__format__(ossl_bio__printf__, 3, 4)));
 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
 ossl_bio__attr__((__format__(ossl_bio__printf__, 3, 0)));
 # undef ossl_bio__attr__
 # undef ossl_bio__printf__
 
 
 BIO_METHOD *BIO_meth_new(int type, const char *name);
 void BIO_meth_free(BIO_METHOD *biom);
 int (*BIO_meth_get_write(const BIO_METHOD *biom)) (BIO *, const char *, int);
 int (*BIO_meth_get_write_ex(const BIO_METHOD *biom)) (BIO *, const char *, size_t,
                                                 size_t *);
 int BIO_meth_set_write(BIO_METHOD *biom,
                        int (*write) (BIO *, const char *, int));
 int BIO_meth_set_write_ex(BIO_METHOD *biom,
                        int (*bwrite) (BIO *, const char *, size_t, size_t *));
 int BIO_meth_set_sendmmsg(BIO_METHOD *biom,
                           int (*f) (BIO *, BIO_MSG *, size_t, size_t,
                                     uint64_t, size_t *));
 int (*BIO_meth_get_sendmmsg(const BIO_METHOD *biom))(BIO *, BIO_MSG *,
                                                      size_t, size_t,
                                                      uint64_t, size_t *);
 int (*BIO_meth_get_read(const BIO_METHOD *biom)) (BIO *, char *, int);
 int (*BIO_meth_get_read_ex(const BIO_METHOD *biom)) (BIO *, char *, size_t, size_t *);
 int BIO_meth_set_read(BIO_METHOD *biom,
                       int (*read) (BIO *, char *, int));
 int BIO_meth_set_read_ex(BIO_METHOD *biom,
                          int (*bread) (BIO *, char *, size_t, size_t *));
 int BIO_meth_set_recvmmsg(BIO_METHOD *biom,
                           int (*f) (BIO *, BIO_MSG *, size_t, size_t,
                                     uint64_t, size_t *));
 int (*BIO_meth_get_recvmmsg(const BIO_METHOD *biom))(BIO *, BIO_MSG *,
                                                      size_t, size_t,
                                                      uint64_t, size_t *);
 int (*BIO_meth_get_puts(const BIO_METHOD *biom)) (BIO *, const char *);
 int BIO_meth_set_puts(BIO_METHOD *biom,
                       int (*puts) (BIO *, const char *));
 int (*BIO_meth_get_gets(const BIO_METHOD *biom)) (BIO *, char *, int);
 int BIO_meth_set_gets(BIO_METHOD *biom,
                       int (*ossl_gets) (BIO *, char *, int));
 long (*BIO_meth_get_ctrl(const BIO_METHOD *biom)) (BIO *, int, long, void *);
 int BIO_meth_set_ctrl(BIO_METHOD *biom,
                       long (*ctrl) (BIO *, int, long, void *));
 int (*BIO_meth_get_create(const BIO_METHOD *bion)) (BIO *);
 int BIO_meth_set_create(BIO_METHOD *biom, int (*create) (BIO *));
 int (*BIO_meth_get_destroy(const BIO_METHOD *biom)) (BIO *);
 int BIO_meth_set_destroy(BIO_METHOD *biom, int (*destroy) (BIO *));
 long (*BIO_meth_get_callback_ctrl(const BIO_METHOD *biom))
                                  (BIO *, int, BIO_info_cb *);
 int BIO_meth_set_callback_ctrl(BIO_METHOD *biom,
                                long (*callback_ctrl) (BIO *, int,
                                                       BIO_info_cb *));
 
 # ifdef  __cplusplus
 }
 # endif
 #endif

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