/*
 * {- join("\n * ", @autowarntext) -}
 *
 * Copyright 1995-2025 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
 */
/* clang-format off */
{-
use OpenSSL::stackhash qw(generate_stack_macros);
-}
/* clang-format on */

#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_CTRL_DGRAM_SET0_LOCAL_ADDR 94

#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 */

/* clang-format off */
{-
    generate_stack_macros("BIO");
-}
/* clang-format on */

/* 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)
#define BIO_dgram_set0_local_addr(b, addr) \
    (int)BIO_ctrl((b), BIO_CTRL_DGRAM_SET0_LOCAL_ADDR, 0, (addr))

/* 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_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_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_set_puts(BIO_METHOD *biom,
    int (*puts)(BIO *, const char *));
int BIO_meth_set_gets(BIO_METHOD *biom,
    int (*ossl_gets)(BIO *, char *, int));
int BIO_meth_set_ctrl(BIO_METHOD *biom,
    long (*ctrl)(BIO *, int, long, void *));
int BIO_meth_set_create(BIO_METHOD *biom, int (*create)(BIO *));
int BIO_meth_set_destroy(BIO_METHOD *biom, int (*destroy)(BIO *));
int BIO_meth_set_callback_ctrl(BIO_METHOD *biom,
    long (*callback_ctrl)(BIO *, int,
        BIO_info_cb *));
#ifndef OPENSSL_NO_DEPRECATED_3_5
OSSL_DEPRECATEDIN_3_5 int (*BIO_meth_get_write(const BIO_METHOD *biom))(BIO *, const char *,
    int);
OSSL_DEPRECATEDIN_3_5 int (*BIO_meth_get_write_ex(const BIO_METHOD *biom))(BIO *, const char *,
    size_t, size_t *);
OSSL_DEPRECATEDIN_3_5 int (*BIO_meth_get_sendmmsg(const BIO_METHOD *biom))(BIO *, BIO_MSG *,
    size_t, size_t,
    uint64_t, size_t *);
OSSL_DEPRECATEDIN_3_5 int (*BIO_meth_get_read(const BIO_METHOD *biom))(BIO *, char *, int);
OSSL_DEPRECATEDIN_3_5 int (*BIO_meth_get_read_ex(const BIO_METHOD *biom))(BIO *, char *,
    size_t, size_t *);
OSSL_DEPRECATEDIN_3_5 int (*BIO_meth_get_recvmmsg(const BIO_METHOD *biom))(BIO *, BIO_MSG *,
    size_t, size_t,
    uint64_t, size_t *);
OSSL_DEPRECATEDIN_3_5 int (*BIO_meth_get_puts(const BIO_METHOD *biom))(BIO *, const char *);
OSSL_DEPRECATEDIN_3_5 int (*BIO_meth_get_gets(const BIO_METHOD *biom))(BIO *, char *, int);
OSSL_DEPRECATEDIN_3_5 long (*BIO_meth_get_ctrl(const BIO_METHOD *biom))(BIO *, int,
    long, void *);
OSSL_DEPRECATEDIN_3_5 int (*BIO_meth_get_create(const BIO_METHOD *bion))(BIO *);
OSSL_DEPRECATEDIN_3_5 int (*BIO_meth_get_destroy(const BIO_METHOD *biom))(BIO *);
OSSL_DEPRECATEDIN_3_5 long (*BIO_meth_get_callback_ctrl(const BIO_METHOD *biom))(BIO *, int,
    BIO_info_cb *);
#endif
#ifdef __cplusplus
}
#endif
#endif
