crypto/bio/bss_acpt.c - third_party/openssl - Git at Google

 /* crypto/bio/bss_acpt.c */
 /* 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 NO_SOCK

 #include <stdio.h>
 #include <errno.h>
 #define USE_SOCKETS
 #include "cryptlib.h"
 #include <openssl/bio.h>

 #ifdef WIN16
 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
 #else
 #define SOCKET_PROTOCOL IPPROTO_TCP
 #endif

 #if (defined(VMS) && __VMS_VER < 70000000)
 /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
 #undef FIONBIO
 #endif

 typedef struct bio_accept_st
 	{
 	int state;
 	char *param_addr;

 	int accept_sock;
 	int accept_nbio;

 	char *addr;
 	int nbio;
 	/* If 0, it means normal, if 1, do a connect on bind failure,
 	 * and if there is no-one listening, bind with SO_REUSEADDR.
 	 * If 2, always use SO_REUSEADDR. */
 	int bind_mode;
 	BIO *bio_chain;
 	} BIO_ACCEPT;

 static int acpt_write(BIO *h,char *buf,int num);
 static int acpt_read(BIO *h,char *buf,int size);
 static int acpt_puts(BIO *h,char *str);
 static long acpt_ctrl(BIO *h,int cmd,long arg1,char *arg2);
 static int acpt_new(BIO *h);
 static int acpt_free(BIO *data);
 static int acpt_state(BIO *b, BIO_ACCEPT *c);
 static void acpt_close_socket(BIO *data);
 BIO_ACCEPT *BIO_ACCEPT_new(void );
 void BIO_ACCEPT_free(BIO_ACCEPT *a);

 #define ACPT_S_BEFORE			1
 #define ACPT_S_GET_ACCEPT_SOCKET	2
 #define ACPT_S_OK			3

 static BIO_METHOD methods_acceptp=
 	{
 	BIO_TYPE_ACCEPT,
 	"socket accept",
 	acpt_write,
 	acpt_read,
 	acpt_puts,
 	NULL, /* connect_gets, */
 	acpt_ctrl,
 	acpt_new,
 	acpt_free,
 	};

 BIO_METHOD *BIO_s_accept(void)
 	{
 	return(&methods_acceptp);
 	}

 static int acpt_new(BIO *bi)
 	{
 	BIO_ACCEPT *ba;

 	bi->init=0;
 	bi->num=INVALID_SOCKET;
 	bi->flags=0;
 	if ((ba=BIO_ACCEPT_new()) == NULL)
 		return(0);
 	bi->ptr=(char *)ba;
 	ba->state=ACPT_S_BEFORE;
 	bi->shutdown=1;
 	return(1);
 	}

 BIO_ACCEPT *BIO_ACCEPT_new(void)
 	{
 	BIO_ACCEPT *ret;

 	if ((ret=(BIO_ACCEPT *)Malloc(sizeof(BIO_ACCEPT))) == NULL)
 		return(NULL);

 	memset(ret,0,sizeof(BIO_ACCEPT));
 	ret->accept_sock=INVALID_SOCKET;
 	ret->bind_mode=BIO_BIND_NORMAL;
 	return(ret);
 	}

 void BIO_ACCEPT_free(BIO_ACCEPT *a)
 	{
 	if(a == NULL)
 	    return;

 	if (a->param_addr != NULL) Free(a->param_addr);
 	if (a->addr != NULL) Free(a->addr);
 	if (a->bio_chain != NULL) BIO_free(a->bio_chain);
 	Free(a);
 	}

 static void acpt_close_socket(BIO *bio)
 	{
 	BIO_ACCEPT *c;

 	c=(BIO_ACCEPT *)bio->ptr;
 	if (c->accept_sock != INVALID_SOCKET)
 		{
 		shutdown(c->accept_sock,2);
 		closesocket(c->accept_sock);
 		c->accept_sock=INVALID_SOCKET;
 		bio->num=INVALID_SOCKET;
 		}
 	}

 static int acpt_free(BIO *a)
 	{
 	BIO_ACCEPT *data;

 	if (a == NULL) return(0);
 	data=(BIO_ACCEPT *)a->ptr;

 	if (a->shutdown)
 		{
 		acpt_close_socket(a);
 		BIO_ACCEPT_free(data);
 		a->ptr=NULL;
 		a->flags=0;
 		a->init=0;
 		}
 	return(1);
 	}

 static int acpt_state(BIO *b, BIO_ACCEPT *c)
 	{
 	BIO *bio=NULL,*dbio;
 	int s= -1;
 	int i;

 again:
 	switch (c->state)
 		{
 	case ACPT_S_BEFORE:
 		if (c->param_addr == NULL)
 			{
 			BIOerr(BIO_F_ACPT_STATE,BIO_R_NO_ACCEPT_PORT_SPECIFIED);
 			return(-1);
 			}
 		s=BIO_get_accept_socket(c->param_addr,c->bind_mode);
 		if (s == INVALID_SOCKET)
 			return(-1);

 		if (c->accept_nbio)
 			{
 			if (!BIO_socket_nbio(s,1))
 				{
 				closesocket(s);
 				BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET);
 				return(-1);
 				}
 			}
 		c->accept_sock=s;
 		b->num=s;
 		c->state=ACPT_S_GET_ACCEPT_SOCKET;
 		return(1);
 		/* break; */
 	case ACPT_S_GET_ACCEPT_SOCKET:
 		if (b->next_bio != NULL)
 			{
 			c->state=ACPT_S_OK;
 			goto again;
 			}
 		i=BIO_accept(c->accept_sock,&(c->addr));
 		if (i < 0) return(i);
 		bio=BIO_new_socket(i,BIO_CLOSE);
 		if (bio == NULL) goto err;

 		BIO_set_callback(bio,BIO_get_callback(b));
 		BIO_set_callback_arg(bio,BIO_get_callback_arg(b));

 		if (c->nbio)
 			{
 			if (!BIO_socket_nbio(i,1))
 				{
 				BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET);
 				goto err;
 				}
 			}

 		/* If the accept BIO has an bio_chain, we dup it and
 		 * put the new socket at the end. */
 		if (c->bio_chain != NULL)
 			{
 			if ((dbio=BIO_dup_chain(c->bio_chain)) == NULL)
 				goto err;
 			if (!BIO_push(dbio,bio)) goto err;
 			bio=dbio;
 			}
 		if (BIO_push(b,bio) == NULL) goto err;

 		c->state=ACPT_S_OK;
 		return(1);
 err:
 		if (bio != NULL)
 			BIO_free(bio);
 		else if (s >= 0)
 			closesocket(s);
 		return(0);
 		/* break; */
 	case ACPT_S_OK:
 		if (b->next_bio == NULL)
 			{
 			c->state=ACPT_S_GET_ACCEPT_SOCKET;
 			goto again;
 			}
 		return(1);
 		/* break; */
 	default:
 		return(0);
 		/* break; */
 		}

 	}

 static int acpt_read(BIO *b, char *out, int outl)
 	{
 	int ret=0;
 	BIO_ACCEPT *data;

 	BIO_clear_retry_flags(b);
 	data=(BIO_ACCEPT *)b->ptr;

 	while (b->next_bio == NULL)
 		{
 		ret=acpt_state(b,data);
 		if (ret <= 0) return(ret);
 		}

 	ret=BIO_read(b->next_bio,out,outl);
 	BIO_copy_next_retry(b);
 	return(ret);
 	}

 static int acpt_write(BIO *b, char *in, int inl)
 	{
 	int ret;
 	BIO_ACCEPT *data;

 	BIO_clear_retry_flags(b);
 	data=(BIO_ACCEPT *)b->ptr;

 	while (b->next_bio == NULL)
 		{
 		ret=acpt_state(b,data);
 		if (ret <= 0) return(ret);
 		}

 	ret=BIO_write(b->next_bio,in,inl);
 	BIO_copy_next_retry(b);
 	return(ret);
 	}

 static long acpt_ctrl(BIO *b, int cmd, long num, char *ptr)
 	{
 	BIO *dbio;
 	int *ip;
 	long ret=1;
 	BIO_ACCEPT *data;
 	char **pp;

 	data=(BIO_ACCEPT *)b->ptr;

 	switch (cmd)
 		{
 	case BIO_CTRL_RESET:
 		ret=0;
 		data->state=ACPT_S_BEFORE;
 		acpt_close_socket(b);
 		b->flags=0;
 		break;
 	case BIO_C_DO_STATE_MACHINE:
 		/* use this one to start the connection */
 		ret=(long)acpt_state(b,data);
 		break;
 	case BIO_C_SET_ACCEPT:
 		if (ptr != NULL)
 			{
 			if (num == 0)
 				{
 				b->init=1;
 				if (data->param_addr != NULL)
 					Free(data->param_addr);
 				data->param_addr=BUF_strdup(ptr);
 				}
 			else if (num == 1)
 				{
 				data->accept_nbio=(ptr != NULL);
 				}
 			else if (num == 2)
 				{
 				if (data->bio_chain != NULL)
 					BIO_free(data->bio_chain);
 				data->bio_chain=(BIO *)ptr;
 				}
 			}
 		break;
 	case BIO_C_SET_NBIO:
 		data->nbio=(int)num;
 		break;
 	case BIO_C_SET_FD:
 		b->init=1;
 		b->num= *((int *)ptr);
 		data->accept_sock=b->num;
 		data->state=ACPT_S_GET_ACCEPT_SOCKET;
 		b->shutdown=(int)num;
 		b->init=1;
 		break;
 	case BIO_C_GET_FD:
 		if (b->init)
 			{
 			ip=(int *)ptr;
 			if (ip != NULL)
 				*ip=data->accept_sock;
 			ret=data->accept_sock;
 			}
 		else
 			ret= -1;
 		break;
 	case BIO_C_GET_ACCEPT:
 		if (b->init)
 			{
 			if (ptr != NULL)
 				{
 				pp=(char **)ptr;
 				*pp=data->param_addr;
 				}
 			else
 				ret= -1;
 			}
 		else
 			ret= -1;
 		break;
 	case BIO_CTRL_GET_CLOSE:
 		ret=b->shutdown;
 		break;
 	case BIO_CTRL_SET_CLOSE:
 		b->shutdown=(int)num;
 		break;
 	case BIO_CTRL_PENDING:
 	case BIO_CTRL_WPENDING:
 		ret=0;
 		break;
 	case BIO_CTRL_FLUSH:
 		break;
 	case BIO_C_SET_BIND_MODE:
 		data->bind_mode=(int)num;
 		break;
 	case BIO_C_GET_BIND_MODE:
 		ret=(long)data->bind_mode;
 		break;
 	case BIO_CTRL_DUP:
 		dbio=(BIO *)ptr;
 /*		if (data->param_port) EAY EAY
 			BIO_set_port(dbio,data->param_port);
 		if (data->param_hostname)
 			BIO_set_hostname(dbio,data->param_hostname);
 		BIO_set_nbio(dbio,data->nbio); */
 		break;

 	default:
 		ret=0;
 		break;
 		}
 	return(ret);
 	}

 static int acpt_puts(BIO *bp, char *str)
 	{
 	int n,ret;

 	n=strlen(str);
 	ret=acpt_write(bp,str,n);
 	return(ret);
 	}

 BIO *BIO_new_accept(char *str)
 	{
 	BIO *ret;

 	ret=BIO_new(BIO_s_accept());
 	if (ret == NULL) return(NULL);
 	if (BIO_set_accept_port(ret,str))
 		return(ret);
 	else
 		{
 		BIO_free(ret);
 		return(NULL);
 		}
 	}

 #endif
	/* crypto/bio/bss_acpt.c */
	/* 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 NO_SOCK

	#include <stdio.h>
	#include <errno.h>
	#define USE_SOCKETS
	#include "cryptlib.h"
	#include <openssl/bio.h>

	#ifdef WIN16
	#define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
	#else
	#define SOCKET_PROTOCOL IPPROTO_TCP
	#endif

	#if (defined(VMS) && __VMS_VER < 70000000)
	/* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
	#undef FIONBIO
	#endif

	typedef struct bio_accept_st
	{
	int state;
	char *param_addr;

	int accept_sock;
	int accept_nbio;

	char *addr;
	int nbio;
	/* If 0, it means normal, if 1, do a connect on bind failure,
	* and if there is no-one listening, bind with SO_REUSEADDR.
	* If 2, always use SO_REUSEADDR. */
	int bind_mode;
	BIO *bio_chain;
	} BIO_ACCEPT;

	static int acpt_write(BIO h,char buf,int num);
	static int acpt_read(BIO h,char buf,int size);
	static int acpt_puts(BIO h,char str);
	static long acpt_ctrl(BIO h,int cmd,long arg1,char arg2);
	static int acpt_new(BIO *h);
	static int acpt_free(BIO *data);
	static int acpt_state(BIO b, BIO_ACCEPT c);
	static void acpt_close_socket(BIO *data);
	BIO_ACCEPT *BIO_ACCEPT_new(void );
	void BIO_ACCEPT_free(BIO_ACCEPT *a);

	#define ACPT_S_BEFORE 1
	#define ACPT_S_GET_ACCEPT_SOCKET 2
	#define ACPT_S_OK 3

	static BIO_METHOD methods_acceptp=
	{
	BIO_TYPE_ACCEPT,
	"socket accept",
	acpt_write,
	acpt_read,
	acpt_puts,
	NULL, /* connect_gets, */
	acpt_ctrl,
	acpt_new,
	acpt_free,
	};

	BIO_METHOD *BIO_s_accept(void)
	{
	return(&methods_acceptp);
	}

	static int acpt_new(BIO *bi)
	{
	BIO_ACCEPT *ba;

	bi->init=0;
	bi->num=INVALID_SOCKET;
	bi->flags=0;
	if ((ba=BIO_ACCEPT_new()) == NULL)
	return(0);
	bi->ptr=(char *)ba;
	ba->state=ACPT_S_BEFORE;
	bi->shutdown=1;
	return(1);
	}

	BIO_ACCEPT *BIO_ACCEPT_new(void)
	{
	BIO_ACCEPT *ret;

	if ((ret=(BIO_ACCEPT *)Malloc(sizeof(BIO_ACCEPT))) == NULL)
	return(NULL);

	memset(ret,0,sizeof(BIO_ACCEPT));
	ret->accept_sock=INVALID_SOCKET;
	ret->bind_mode=BIO_BIND_NORMAL;
	return(ret);
	}

	void BIO_ACCEPT_free(BIO_ACCEPT *a)
	{
	if(a == NULL)
	return;

	if (a->param_addr != NULL) Free(a->param_addr);
	if (a->addr != NULL) Free(a->addr);
	if (a->bio_chain != NULL) BIO_free(a->bio_chain);
	Free(a);
	}

	static void acpt_close_socket(BIO *bio)
	{
	BIO_ACCEPT *c;

	c=(BIO_ACCEPT *)bio->ptr;
	if (c->accept_sock != INVALID_SOCKET)
	{
	shutdown(c->accept_sock,2);
	closesocket(c->accept_sock);
	c->accept_sock=INVALID_SOCKET;
	bio->num=INVALID_SOCKET;
	}
	}

	static int acpt_free(BIO *a)
	{
	BIO_ACCEPT *data;

	if (a == NULL) return(0);
	data=(BIO_ACCEPT *)a->ptr;

	if (a->shutdown)
	{
	acpt_close_socket(a);
	BIO_ACCEPT_free(data);
	a->ptr=NULL;
	a->flags=0;
	a->init=0;
	}
	return(1);
	}

	static int acpt_state(BIO b, BIO_ACCEPT c)
	{
	BIO bio=NULL,dbio;
	int s= -1;
	int i;

	again:
	switch (c->state)
	{
	case ACPT_S_BEFORE:
	if (c->param_addr == NULL)
	{
	BIOerr(BIO_F_ACPT_STATE,BIO_R_NO_ACCEPT_PORT_SPECIFIED);
	return(-1);
	}
	s=BIO_get_accept_socket(c->param_addr,c->bind_mode);
	if (s == INVALID_SOCKET)
	return(-1);

	if (c->accept_nbio)
	{
	if (!BIO_socket_nbio(s,1))
	{
	closesocket(s);
	BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET);
	return(-1);
	}
	}
	c->accept_sock=s;
	b->num=s;
	c->state=ACPT_S_GET_ACCEPT_SOCKET;
	return(1);
	/* break; */
	case ACPT_S_GET_ACCEPT_SOCKET:
	if (b->next_bio != NULL)
	{
	c->state=ACPT_S_OK;
	goto again;
	}
	i=BIO_accept(c->accept_sock,&(c->addr));
	if (i < 0) return(i);
	bio=BIO_new_socket(i,BIO_CLOSE);
	if (bio == NULL) goto err;

	BIO_set_callback(bio,BIO_get_callback(b));
	BIO_set_callback_arg(bio,BIO_get_callback_arg(b));

	if (c->nbio)
	{
	if (!BIO_socket_nbio(i,1))
	{
	BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET);
	goto err;
	}
	}

	/* If the accept BIO has an bio_chain, we dup it and
	* put the new socket at the end. */
	if (c->bio_chain != NULL)
	{
	if ((dbio=BIO_dup_chain(c->bio_chain)) == NULL)
	goto err;
	if (!BIO_push(dbio,bio)) goto err;
	bio=dbio;
	}
	if (BIO_push(b,bio) == NULL) goto err;

	c->state=ACPT_S_OK;
	return(1);
	err:
	if (bio != NULL)
	BIO_free(bio);
	else if (s >= 0)
	closesocket(s);
	return(0);
	/* break; */
	case ACPT_S_OK:
	if (b->next_bio == NULL)
	{
	c->state=ACPT_S_GET_ACCEPT_SOCKET;
	goto again;
	}
	return(1);
	/* break; */
	default:
	return(0);
	/* break; */
	}

	}

	static int acpt_read(BIO b, char out, int outl)
	{
	int ret=0;
	BIO_ACCEPT *data;

	BIO_clear_retry_flags(b);
	data=(BIO_ACCEPT *)b->ptr;

	while (b->next_bio == NULL)
	{
	ret=acpt_state(b,data);
	if (ret <= 0) return(ret);
	}

	ret=BIO_read(b->next_bio,out,outl);
	BIO_copy_next_retry(b);
	return(ret);
	}

	static int acpt_write(BIO b, char in, int inl)
	{
	int ret;
	BIO_ACCEPT *data;

	BIO_clear_retry_flags(b);
	data=(BIO_ACCEPT *)b->ptr;

	while (b->next_bio == NULL)
	{
	ret=acpt_state(b,data);
	if (ret <= 0) return(ret);
	}

	ret=BIO_write(b->next_bio,in,inl);
	BIO_copy_next_retry(b);
	return(ret);
	}

	static long acpt_ctrl(BIO b, int cmd, long num, char ptr)
	{
	BIO *dbio;
	int *ip;
	long ret=1;
	BIO_ACCEPT *data;
	char **pp;

	data=(BIO_ACCEPT *)b->ptr;

	switch (cmd)
	{
	case BIO_CTRL_RESET:
	ret=0;
	data->state=ACPT_S_BEFORE;
	acpt_close_socket(b);
	b->flags=0;
	break;
	case BIO_C_DO_STATE_MACHINE:
	/* use this one to start the connection */
	ret=(long)acpt_state(b,data);
	break;
	case BIO_C_SET_ACCEPT:
	if (ptr != NULL)
	{
	if (num == 0)
	{
	b->init=1;
	if (data->param_addr != NULL)
	Free(data->param_addr);
	data->param_addr=BUF_strdup(ptr);
	}
	else if (num == 1)
	{
	data->accept_nbio=(ptr != NULL);
	}
	else if (num == 2)
	{
	if (data->bio_chain != NULL)
	BIO_free(data->bio_chain);
	data->bio_chain=(BIO *)ptr;
	}
	}
	break;
	case BIO_C_SET_NBIO:
	data->nbio=(int)num;
	break;
	case BIO_C_SET_FD:
	b->init=1;
	b->num= ((int )ptr);
	data->accept_sock=b->num;
	data->state=ACPT_S_GET_ACCEPT_SOCKET;
	b->shutdown=(int)num;
	b->init=1;
	break;
	case BIO_C_GET_FD:
	if (b->init)
	{
	ip=(int *)ptr;
	if (ip != NULL)
	*ip=data->accept_sock;
	ret=data->accept_sock;
	}
	else
	ret= -1;
	break;
	case BIO_C_GET_ACCEPT:
	if (b->init)
	{
	if (ptr != NULL)
	{
	pp=(char **)ptr;
	*pp=data->param_addr;
	}
	else
	ret= -1;
	}
	else
	ret= -1;
	break;
	case BIO_CTRL_GET_CLOSE:
	ret=b->shutdown;
	break;
	case BIO_CTRL_SET_CLOSE:
	b->shutdown=(int)num;
	break;
	case BIO_CTRL_PENDING:
	case BIO_CTRL_WPENDING:
	ret=0;
	break;
	case BIO_CTRL_FLUSH:
	break;
	case BIO_C_SET_BIND_MODE:
	data->bind_mode=(int)num;
	break;
	case BIO_C_GET_BIND_MODE:
	ret=(long)data->bind_mode;
	break;
	case BIO_CTRL_DUP:
	dbio=(BIO *)ptr;
	/* if (data->param_port) EAY EAY
	BIO_set_port(dbio,data->param_port);
	if (data->param_hostname)
	BIO_set_hostname(dbio,data->param_hostname);
	BIO_set_nbio(dbio,data->nbio); */
	break;

	default:
	ret=0;
	break;
	}
	return(ret);
	}

	static int acpt_puts(BIO bp, char str)
	{
	int n,ret;

	n=strlen(str);
	ret=acpt_write(bp,str,n);
	return(ret);
	}

	BIO BIO_new_accept(char str)
	{
	BIO *ret;

	ret=BIO_new(BIO_s_accept());
	if (ret == NULL) return(NULL);
	if (BIO_set_accept_port(ret,str))
	return(ret);
	else
	{
	BIO_free(ret);
	return(NULL);
	}
	}

	#endif