* Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
* Licensed under the OpenSSL license (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
# include <openssl/e_os2.h>
# ifndef OPENSSL_NO_STDIO
# include <openssl/crypto.h>
# include <openssl/bioerr.h>
/* 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_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)
# define BIO_TYPE_DGRAM_SCTP (24|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
#define BIO_TYPE_START 128
* BIO_FILENAME_READ|BIO_CLOSE to open or close on free.
* BIO_set_fp(in,stdin,BIO_NOCLOSE);
# define BIO_NOCLOSE 0x00
* 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 */
# 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 tiemd out */
/* #ifdef IP_MTU_DISCOVER */
# define BIO_CTRL_DGRAM_MTU_DISCOVER 39/* set DF bit on egress packets */
# 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
# define BIO_CTRL_DGRAM_MTU_EXCEEDED 43/* check whether the MTU was
* exceed in the previous write
# 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
# 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
# define BIO_CTRL_DGRAM_SET_PEEK_MODE 71
# 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 BIO_FLAGS_UPLINK
* "UPLINK" flag denotes file descriptors provided by application. It
* defaults to 0, as most platforms don't require UPLINK interface.
# define BIO_FLAGS_UPLINK 0
# 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
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
* 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
* 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)
typedef long (*BIO_callback_fn)(BIO *b, int oper, const char *argp, int argi,
typedef long (*BIO_callback_fn_ex)(BIO *b, int oper, const char *argp,
long argl, int ret, size_t *processed);
BIO_callback_fn BIO_get_callback(const BIO *b);
void BIO_set_callback(BIO *b, BIO_callback_fn callback);
BIO_callback_fn_ex BIO_get_callback_ex(const BIO *b);
void BIO_set_callback_ex(BIO *b, BIO_callback_fn_ex callback);
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 */
/* Prefix and suffix callback in ASN1 BIO */
typedef int asn1_ps_func (BIO *b, unsigned char **pbuf, int *plen,
/* SCTP parameter structs */
struct bio_dgram_sctp_sndinfo {
struct bio_dgram_sctp_rcvinfo {
struct bio_dgram_sctp_prinfo {
* #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
# 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_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_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)
/* 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
# define BIO_set_conn_hostname(b,name) BIO_ctrl(b,BIO_C_SET_CONNECT,0, \
# define BIO_set_conn_port(b,port) BIO_ctrl(b,BIO_C_SET_CONNECT,1, \
# define BIO_set_conn_address(b,addr) BIO_ctrl(b,BIO_C_SET_CONNECT,2, \
# 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_set_conn_mode(b,n) BIO_ctrl(b,BIO_C_SET_CONNECT_MODE,(n),NULL)
# define BIO_set_accept_name(b,name) BIO_ctrl(b,BIO_C_SET_ACCEPT,0, \
# define BIO_set_accept_port(b,port) BIO_ctrl(b,BIO_C_SET_ACCEPT,1, \
# 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, \
# 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)
/* 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)
/* BIO_s_accept() and BIO_s_connect() */
# define BIO_do_connect(b) BIO_do_handshake(b)
# define BIO_do_accept(b) BIO_do_handshake(b)
# endif /* OPENSSL_NO_SOCK */
# 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))
# 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
* 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);
# define BIO_read_filename(b,name) (int)BIO_ctrl(b,BIO_C_SET_FILENAME, \
BIO_CLOSE|BIO_FP_READ,(char *)(name))
# 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)
/* #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, \
# 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, \
# 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))
# 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)
It is recommended that you Edit text format, this type of Fix handles quite a lot in one request
