/* crypto/bio/bio.h */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 * 

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 * 

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 * 

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from 

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 * 

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 * 

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

#ifndef HEADER_BIO_H

#define HEADER_BIO_H

#ifndef OPENSSL_NO_FP_API

# include <stdio.h>

#endif

#include <stdarg.h>

#include <openssl/crypto.h>

#include <openssl/e_os2.h>

#ifdef  __cplusplus

extern "C" {

#endif

/* These are the 'types' of BIOs */

#define BIO_TYPE_NONE		0

#define BIO_TYPE_MEM		(1|0x0400)

#define BIO_TYPE_FILE		(2|0x0400)

#define BIO_TYPE_FD		(4|0x0400|0x0100)

#define BIO_TYPE_SOCKET		(5|0x0400|0x0100)

#define BIO_TYPE_NULL		(6|0x0400)

#define BIO_TYPE_SSL		(7|0x0200)

#define BIO_TYPE_MD		(8|0x0200)		/* passive filter */

#define BIO_TYPE_BUFFER		(9|0x0200)		/* filter */

#define BIO_TYPE_CIPHER		(10|0x0200)		/* filter */

#define BIO_TYPE_BASE64		(11|0x0200)		/* filter */

#define BIO_TYPE_CONNECT	(12|0x0400|0x0100)	/* socket - connect */

#define BIO_TYPE_ACCEPT		(13|0x0400|0x0100)	/* socket for accept */

#define BIO_TYPE_PROXY_CLIENT	(14|0x0200)		/* client proxy BIO */

#define BIO_TYPE_PROXY_SERVER	(15|0x0200)		/* server proxy BIO */

#define BIO_TYPE_NBIO_TEST	(16|0x0200)		/* server proxy BIO */

#define BIO_TYPE_NULL_FILTER	(17|0x0200)

#define BIO_TYPE_BER		(18|0x0200)		/* BER -> bin filter */

#define BIO_TYPE_BIO		(19|0x0400)		/* (half a) BIO pair */

#define BIO_TYPE_LINEBUFFER	(20|0x0200)		/* filter */

#define BIO_TYPE_DESCRIPTOR	0x0100	/* socket, fd, connect or accept */

#define BIO_TYPE_FILTER		0x0200

#define BIO_TYPE_SOURCE_SINK	0x0400

/* 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 */

/* callback is int cb(BIO *bio,state,ret); */

#define BIO_CTRL_SET_CALLBACK	14  /* opt - set callback function */

#define BIO_CTRL_GET_CALLBACK	15  /* opt - set callback function */

#define BIO_CTRL_SET_FILENAME	30	/* BIO_s_file special */

/* 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

/* Used in BIO_gethostbyname() */

#define BIO_GHBN_CTRL_HITS		1

#define BIO_GHBN_CTRL_MISSES		2

#define BIO_GHBN_CTRL_CACHE_SIZE	3

#define BIO_GHBN_CTRL_GET_ENTRY		4

#define BIO_GHBN_CTRL_FLUSH		5

/* Mostly used in the SSL BIO */

/* Not used anymore

 * #define BIO_FLAGS_PROTOCOL_DELAYED_READ 0x10

 * #define BIO_FLAGS_PROTOCOL_DELAYED_WRITE 0x20

 * #define BIO_FLAGS_PROTOCOL_STARTUP	0x40

 */

#define BIO_FLAGS_BASE64_NO_NL	0x100

/* This is used with memory BIOs: it means we shouldn't free up or change the

 * data in any way.

 */

#define BIO_FLAGS_MEM_RDONLY	0x200

#define BIO_set_flags(b,f) ((b)->flags|=(f))

#define BIO_get_flags(b) ((b)->flags)

#define BIO_set_retry_special(b) \

		((b)->flags|=(BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY))

#define BIO_set_retry_read(b) \

		((b)->flags|=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY))

#define BIO_set_retry_write(b) \

		((b)->flags|=(BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY))

/* These are normally used internally in BIOs */

#define BIO_clear_flags(b,f) ((b)->flags&= ~(f))

#define BIO_clear_retry_flags(b) \

		((b)->flags&= ~(BIO_FLAGS_RWS|BIO_FLAGS_SHOULD_RETRY))

#define BIO_get_retry_flags(b) \

		((b)->flags&(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)		((a)->flags & BIO_FLAGS_READ)

#define BIO_should_write(a)		((a)->flags & BIO_FLAGS_WRITE)

#define BIO_should_io_special(a)	((a)->flags & BIO_FLAGS_IO_SPECIAL)

#define BIO_retry_type(a)		((a)->flags & BIO_FLAGS_RWS)

#define BIO_should_retry(a)		((a)->flags & 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

/* 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)

#define BIO_set_callback(b,cb)		((b)->callback=(cb))

#define BIO_set_callback_arg(b,arg)	((b)->cb_arg=(char *)(arg))

#define BIO_get_callback_arg(b)		((b)->cb_arg)

#define BIO_get_callback(b)		((b)->callback)

#define BIO_method_name(b)		((b)->method->name)

#define BIO_method_type(b)		((b)->method->type)

typedef struct bio_st BIO;

typedef void bio_info_cb(struct bio_st *, int, const char *, int, long, long);

#ifndef OPENSSL_SYS_WIN16

typedef struct bio_method_st

	{

	int type;

	const char *name;

	int (*bwrite)(BIO *, const char *, int);

	int (*bread)(BIO *, char *, int);

	int (*bputs)(BIO *, const char *);

	int (*bgets)(BIO *, char *, int);

	long (*ctrl)(BIO *, int, long, void *);

	int (*create)(BIO *);

	int (*destroy)(BIO *);

        long (*callback_ctrl)(BIO *, int, bio_info_cb *);

	} BIO_METHOD;

#else

typedef struct bio_method_st

	{

	int type;

	const char *name;

	int (_far *bwrite)();

	int (_far *bread)();

	int (_far *bputs)();

	int (_far *bgets)();

	long (_far *ctrl)();

	int (_far *create)();

	int (_far *destroy)();

	long (_far *callback_ctrl)();

	} BIO_METHOD;

#endif

struct bio_st

	{

	BIO_METHOD *method;

	/* bio, mode, argp, argi, argl, ret */

	long (*callback)(struct bio_st *,int,const char *,int, long,long);

	char *cb_arg; /* first argument for the callback */

	int init;

	int shutdown;

	int flags;	/* extra storage */

	int retry_reason;

	int num;

	void *ptr;

	struct bio_st *next_bio;	/* used by filter BIOs */

	struct bio_st *prev_bio;	/* used by filter BIOs */

	int references;

	unsigned long num_read;

	unsigned long num_write;

	CRYPTO_EX_DATA ex_data;

	};

DECLARE_STACK_OF(BIO)

typedef struct bio_f_buffer_ctx_struct

	{

	/* BIO *bio; */ /* this is now in the BIO struct */

	int ibuf_size;	/* how big is the input buffer */

	int obuf_size;	/* how big is the output buffer */

	char *ibuf;		/* the char array */

	int ibuf_len;		/* how many bytes are in it */

	int ibuf_off;		/* write/read offset */

	char *obuf;		/* the char array */

	int obuf_len;		/* how many bytes are in it */

	int obuf_off;		/* write/read offset */

	} BIO_F_BUFFER_CTX;

/* connect BIO stuff */

#define BIO_CONN_S_BEFORE		1

#define BIO_CONN_S_GET_IP		2

#define BIO_CONN_S_GET_PORT		3

#define BIO_CONN_S_CREATE_SOCKET	4

#define BIO_CONN_S_CONNECT		5

#define BIO_CONN_S_OK			6

#define BIO_CONN_S_BLOCKED_CONNECT	7

#define BIO_CONN_S_NBIO			8

/*#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_set_app_data(s,arg)		BIO_set_ex_data(s,0,arg)

#define BIO_get_app_data(s)		BIO_get_ex_data(s,0)

/* BIO_s_connect() and BIO_s_socks4a_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_ip(b,ip)	  BIO_ctrl(b,BIO_C_SET_CONNECT,2,(char *)ip)

#define BIO_set_conn_int_port(b,port) BIO_ctrl(b,BIO_C_SET_CONNECT,3,(char *)port)

#define BIO_get_conn_hostname(b)  BIO_ptr_ctrl(b,BIO_C_GET_CONNECT,0)

#define BIO_get_conn_port(b)      BIO_ptr_ctrl(b,BIO_C_GET_CONNECT,1)

#define BIO_get_conn_ip(b) 		 BIO_ptr_ctrl(b,BIO_C_GET_CONNECT,2)

#define BIO_get_conn_int_port(b) BIO_int_ctrl(b,BIO_C_GET_CONNECT,3)

#define BIO_set_nbio(b,n)	BIO_ctrl(b,BIO_C_SET_NBIO,(n),NULL)

/* BIO_s_accept_socket() */

#define BIO_set_accept_port(b,name) BIO_ctrl(b,BIO_C_SET_ACCEPT,0,(char *)name)

#define BIO_get_accept_port(b)	BIO_ptr_ctrl(b,BIO_C_GET_ACCEPT,0)

/* #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,1,(n)?"a":NULL)

#define BIO_set_accept_bios(b,bio) BIO_ctrl(b,BIO_C_SET_ACCEPT,2,(char *)bio)

#define BIO_BIND_NORMAL			0

#define BIO_BIND_REUSEADDR_IF_UNUSED	1

#define BIO_BIND_REUSEADDR		2

#define BIO_set_bind_mode(b,mode) BIO_ctrl(b,BIO_C_SET_BIND_MODE,mode,NULL)

#define BIO_get_bind_mode(b,mode) BIO_ctrl(b,BIO_C_GET_BIND_MODE,0,NULL)

#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_proxy_client() */

#define BIO_set_url(b,url)	BIO_ctrl(b,BIO_C_SET_PROXY_PARAM,0,(char *)(url))

#define BIO_set_proxies(b,p)	BIO_ctrl(b,BIO_C_SET_PROXY_PARAM,1,(char *)(p))

/* BIO_set_nbio(b,n) */

#define BIO_set_filter_bio(b,s) BIO_ctrl(b,BIO_C_SET_PROXY_PARAM,2,(char *)(s))

/* BIO *BIO_get_filter_bio(BIO *bio); */

#define BIO_set_proxy_cb(b,cb) BIO_callback_ctrl(b,BIO_C_SET_PROXY_PARAM,3,(void *(*cb)()))

#define BIO_set_proxy_header(b,sk) BIO_ctrl(b,BIO_C_SET_PROXY_PARAM,4,(char *)sk)

#define BIO_set_no_connect_return(b,bool) BIO_int_ctrl(b,BIO_C_SET_PROXY_PARAM,5,bool)

#define BIO_get_proxy_header(b,skp) BIO_ctrl(b,BIO_C_GET_PROXY_PARAM,0,(char *)skp)

#define BIO_get_proxies(b,pxy_p) BIO_ctrl(b,BIO_C_GET_PROXY_PARAM,1,(char *)(pxy_p))

#define BIO_get_url(b,url)	BIO_ctrl(b,BIO_C_GET_PROXY_PARAM,2,(char *)(url))

#define BIO_get_no_connect_return(b)	BIO_ctrl(b,BIO_C_GET_PROXY_PARAM,5,NULL)

#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)

#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) BIO_ctrl(b,BIO_C_SET_FILENAME, \

		BIO_CLOSE|BIO_FP_READ,(char *)name)

#endif

#define BIO_write_filename(b,name) BIO_ctrl(b,BIO_C_SET_FILENAME, \

		BIO_CLOSE|BIO_FP_WRITE,name)

#define BIO_append_filename(b,name) BIO_ctrl(b,BIO_C_SET_FILENAME, \

		BIO_CLOSE|BIO_FP_APPEND,name)

#define BIO_rw_filename(b,name) 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)

/* 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);

/* These two aren't currently implemented */

/* int BIO_get_ex_num(BIO *bio); */

/* void BIO_set_ex_free_func(BIO *bio,int idx,void (*cb)()); */

int BIO_set_ex_data(BIO *bio,int idx,void *data);

void *BIO_get_ex_data(BIO *bio,int idx);

int BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,

	CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);

unsigned long BIO_number_read(BIO *bio);

unsigned long BIO_number_written(BIO *bio);

# ifndef OPENSSL_NO_FP_API

#  if defined(OPENSSL_SYS_WIN16) && defined(_WINDLL)

BIO_METHOD *BIO_s_file_internal(void);

BIO *BIO_new_file_internal(char *filename, char *mode);

BIO *BIO_new_fp_internal(FILE *stream, int close_flag);

#    define BIO_s_file	BIO_s_file_internal

#    define BIO_new_file	BIO_new_file_internal

#    define BIO_new_fp	BIO_new_fp_internal

#  else /* FP_API */

BIO_METHOD *BIO_s_file(void );

BIO *BIO_new_file(const char *filename, const char *mode);

BIO *BIO_new_fp(FILE *stream, int close_flag);

#    define BIO_s_file_internal		BIO_s_file

#    define BIO_new_file_internal	BIO_new_file

#    define BIO_new_fp_internal		BIO_s_file

#  endif /* FP_API */

# endif

BIO *	BIO_new(BIO_METHOD *type);

int	BIO_set(BIO *a,BIO_METHOD *type);

int	BIO_free(BIO *a);

void	BIO_vfree(BIO *a);

int	BIO_read(BIO *b, void *data, int len);

int	BIO_gets(BIO *bp,char *buf, int size);

int	BIO_write(BIO *b, const void *data, int len);

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, void (*fp)(struct bio_st *, int, const char *, int, long, long));

char *	BIO_ptr_ctrl(BIO *bp,int cmd,long larg);