/* 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.]

  */

  /*

  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

  */

 #include <stdio.h>

 #include <errno.h>

 #define USE_SOCKETS

 #include "cryptlib.h"

 #include <openssl/bio.h>

 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

 #include "libcrypto_wsd_macros.h"

 #include "libcrypto_wsd.h"

 #endif

 #ifndef OPENSSL_NO_SOCK

 #ifdef OPENSSL_SYS_WIN16

 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */

 #else

 #define SOCKET_PROTOCOL IPPROTO_TCP

 #endif

 #if (defined(OPENSSL_SYS_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, const char *buf, int num);

 static int acpt_read(BIO *h, char *buf, int size);

 static int acpt_puts(BIO *h, const char *str);

 static long acpt_ctrl(BIO *h, int cmd, long arg1, void *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

 #ifndef EMULATOR

 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,

 	NULL,

 	};

 #else

 GET_STATIC_VAR_FROM_TLS(methods_acceptp,bss_acpt,BIO_METHOD)

 #define methods_acceptp (*GET_WSD_VAR_NAME(methods_acceptp,bss_acpt,s)())

 const BIO_METHOD temp_s_methods_acceptp=

 	{

 	BIO_TYPE_ACCEPT,

 	"socket accept",

 	acpt_write,

 	acpt_read,

 	acpt_puts,

 	NULL, /* connect_gets, */

 	acpt_ctrl,

 	acpt_new,

 	acpt_free,

 	NULL,

 	};

 #endif	

 EXPORT_C 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);

 	}

 EXPORT_C BIO_ACCEPT *BIO_ACCEPT_new(void)

 	{

 	BIO_ACCEPT *ret;

 	if ((ret=(BIO_ACCEPT *)OPENSSL_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);

 	}

 EXPORT_C void BIO_ACCEPT_free(BIO_ACCEPT *a)

 	{

 	if(a == NULL)

 	    return;

 	if (a->param_addr != NULL) OPENSSL_free(a->param_addr);

 	if (a->addr != NULL) OPENSSL_free(a->addr);

 	if (a->bio_chain != NULL) BIO_free(a->bio_chain);

 	OPENSSL_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;

 			}

 		BIO_clear_retry_flags(b);

 		b->retry_reason=0;

 		i=BIO_accept(c->accept_sock,&(c->addr));

 		/* -2 return means we should retry */

 		if(i == -2)

 			{

 			BIO_set_retry_special(b);

 			b->retry_reason=BIO_RR_ACCEPT;

 			return -1;

 			}

 		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, const 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, void *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)

 					OPENSSL_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, const char *str)

 	{

 	int n,ret;

 	n=strlen(str);

 	ret=acpt_write(bp,str,n);

 	return(ret);

 	}

 EXPORT_C 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