/* 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