sl@0: /* crypto/bio/bss_acpt.c */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0:  /*
sl@0:  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
sl@0:  */
sl@0: 
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include <errno.h>
sl@0: #define USE_SOCKETS
sl@0: #include "cryptlib.h"
sl@0: #include <openssl/bio.h>
sl@0: #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
sl@0: #include "libcrypto_wsd_macros.h"
sl@0: #include "libcrypto_wsd.h"
sl@0: #endif
sl@0: 
sl@0: 
sl@0: #ifndef OPENSSL_NO_SOCK
sl@0: 
sl@0: #ifdef OPENSSL_SYS_WIN16
sl@0: #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
sl@0: #else
sl@0: #define SOCKET_PROTOCOL IPPROTO_TCP
sl@0: #endif
sl@0: 
sl@0: #if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000)
sl@0: /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
sl@0: #undef FIONBIO
sl@0: #endif
sl@0: 
sl@0: typedef struct bio_accept_st
sl@0: 	{
sl@0: 	int state;
sl@0: 	char *param_addr;
sl@0: 
sl@0: 	int accept_sock;
sl@0: 	int accept_nbio;
sl@0: 
sl@0: 	char *addr;
sl@0: 	int nbio;
sl@0: 	/* If 0, it means normal, if 1, do a connect on bind failure,
sl@0: 	 * and if there is no-one listening, bind with SO_REUSEADDR.
sl@0: 	 * If 2, always use SO_REUSEADDR. */
sl@0: 	int bind_mode;
sl@0: 	BIO *bio_chain;
sl@0: 	} BIO_ACCEPT;
sl@0: 
sl@0: static int acpt_write(BIO *h, const char *buf, int num);
sl@0: static int acpt_read(BIO *h, char *buf, int size);
sl@0: static int acpt_puts(BIO *h, const char *str);
sl@0: static long acpt_ctrl(BIO *h, int cmd, long arg1, void *arg2);
sl@0: static int acpt_new(BIO *h);
sl@0: static int acpt_free(BIO *data);
sl@0: static int acpt_state(BIO *b, BIO_ACCEPT *c);
sl@0: static void acpt_close_socket(BIO *data);
sl@0: BIO_ACCEPT *BIO_ACCEPT_new(void );
sl@0: void BIO_ACCEPT_free(BIO_ACCEPT *a);
sl@0: 
sl@0: #define ACPT_S_BEFORE			1
sl@0: #define ACPT_S_GET_ACCEPT_SOCKET	2
sl@0: #define ACPT_S_OK			3
sl@0: 
sl@0: #ifndef EMULATOR
sl@0: static BIO_METHOD methods_acceptp=
sl@0: 	{
sl@0: 	BIO_TYPE_ACCEPT,
sl@0: 	"socket accept",
sl@0: 	acpt_write,
sl@0: 	acpt_read,
sl@0: 	acpt_puts,
sl@0: 	NULL, /* connect_gets, */
sl@0: 	acpt_ctrl,
sl@0: 	acpt_new,
sl@0: 	acpt_free,
sl@0: 	NULL,
sl@0: 	};
sl@0: #else
sl@0: 
sl@0: GET_STATIC_VAR_FROM_TLS(methods_acceptp,bss_acpt,BIO_METHOD)
sl@0: #define methods_acceptp (*GET_WSD_VAR_NAME(methods_acceptp,bss_acpt,s)())
sl@0: const BIO_METHOD temp_s_methods_acceptp=
sl@0: 	{
sl@0: 	BIO_TYPE_ACCEPT,
sl@0: 	"socket accept",
sl@0: 	acpt_write,
sl@0: 	acpt_read,
sl@0: 	acpt_puts,
sl@0: 	NULL, /* connect_gets, */
sl@0: 	acpt_ctrl,
sl@0: 	acpt_new,
sl@0: 	acpt_free,
sl@0: 	NULL,
sl@0: 	};
sl@0: 
sl@0: #endif	
sl@0: 	
sl@0: 
sl@0: EXPORT_C BIO_METHOD *BIO_s_accept(void)
sl@0: 	{
sl@0: 	return(&methods_acceptp);
sl@0: 	}
sl@0: 
sl@0: static int acpt_new(BIO *bi)
sl@0: 	{
sl@0: 	BIO_ACCEPT *ba;
sl@0: 
sl@0: 	bi->init=0;
sl@0: 	bi->num=INVALID_SOCKET;
sl@0: 	bi->flags=0;
sl@0: 	if ((ba=BIO_ACCEPT_new()) == NULL)
sl@0: 		return(0);
sl@0: 	bi->ptr=(char *)ba;
sl@0: 	ba->state=ACPT_S_BEFORE;
sl@0: 	bi->shutdown=1;
sl@0: 	return(1);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C BIO_ACCEPT *BIO_ACCEPT_new(void)
sl@0: 	{
sl@0: 	BIO_ACCEPT *ret;
sl@0: 
sl@0: 	if ((ret=(BIO_ACCEPT *)OPENSSL_malloc(sizeof(BIO_ACCEPT))) == NULL)
sl@0: 		return(NULL);
sl@0: 
sl@0: 	memset(ret,0,sizeof(BIO_ACCEPT));
sl@0: 	ret->accept_sock=INVALID_SOCKET;
sl@0: 	ret->bind_mode=BIO_BIND_NORMAL;
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C void BIO_ACCEPT_free(BIO_ACCEPT *a)
sl@0: 	{
sl@0: 	if(a == NULL)
sl@0: 	    return;
sl@0: 
sl@0: 	if (a->param_addr != NULL) OPENSSL_free(a->param_addr);
sl@0: 	if (a->addr != NULL) OPENSSL_free(a->addr);
sl@0: 	if (a->bio_chain != NULL) BIO_free(a->bio_chain);
sl@0: 	OPENSSL_free(a);
sl@0: 	}
sl@0: 
sl@0: static void acpt_close_socket(BIO *bio)
sl@0: 	{
sl@0: 	BIO_ACCEPT *c;
sl@0: 
sl@0: 	c=(BIO_ACCEPT *)bio->ptr;
sl@0: 	if (c->accept_sock != INVALID_SOCKET)
sl@0: 		{
sl@0: 		shutdown(c->accept_sock,2);
sl@0: 		closesocket(c->accept_sock);
sl@0: 		c->accept_sock=INVALID_SOCKET;
sl@0: 		bio->num=INVALID_SOCKET;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: static int acpt_free(BIO *a)
sl@0: 	{
sl@0: 	BIO_ACCEPT *data;
sl@0: 
sl@0: 	if (a == NULL) return(0);
sl@0: 	data=(BIO_ACCEPT *)a->ptr;
sl@0: 	 
sl@0: 	if (a->shutdown)
sl@0: 		{
sl@0: 		acpt_close_socket(a);
sl@0: 		BIO_ACCEPT_free(data);
sl@0: 		a->ptr=NULL;
sl@0: 		a->flags=0;
sl@0: 		a->init=0;
sl@0: 		}
sl@0: 	return(1);
sl@0: 	}
sl@0: 	
sl@0: static int acpt_state(BIO *b, BIO_ACCEPT *c)
sl@0: 	{
sl@0: 	BIO *bio=NULL,*dbio;
sl@0: 	int s= -1;
sl@0: 	int i;
sl@0: 
sl@0: again:
sl@0: 	switch (c->state)
sl@0: 		{
sl@0: 	case ACPT_S_BEFORE:
sl@0: 		if (c->param_addr == NULL)
sl@0: 			{
sl@0: 			BIOerr(BIO_F_ACPT_STATE,BIO_R_NO_ACCEPT_PORT_SPECIFIED);
sl@0: 			return(-1);
sl@0: 			}
sl@0: 		s=BIO_get_accept_socket(c->param_addr,c->bind_mode);
sl@0: 		if (s == INVALID_SOCKET)
sl@0: 			return(-1);
sl@0: 
sl@0: 		if (c->accept_nbio)
sl@0: 			{
sl@0: 			if (!BIO_socket_nbio(s,1))
sl@0: 				{
sl@0: 				closesocket(s);
sl@0: 				BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET);
sl@0: 				return(-1);
sl@0: 				}
sl@0: 			}
sl@0: 		c->accept_sock=s;
sl@0: 		b->num=s;
sl@0: 		c->state=ACPT_S_GET_ACCEPT_SOCKET;
sl@0: 		return(1);
sl@0: 		/* break; */
sl@0: 	case ACPT_S_GET_ACCEPT_SOCKET:
sl@0: 		if (b->next_bio != NULL)
sl@0: 			{
sl@0: 			c->state=ACPT_S_OK;
sl@0: 			goto again;
sl@0: 			}
sl@0: 		BIO_clear_retry_flags(b);
sl@0: 		b->retry_reason=0;
sl@0: 		i=BIO_accept(c->accept_sock,&(c->addr));
sl@0: 
sl@0: 		/* -2 return means we should retry */
sl@0: 		if(i == -2)
sl@0: 			{
sl@0: 			BIO_set_retry_special(b);
sl@0: 			b->retry_reason=BIO_RR_ACCEPT;
sl@0: 			return -1;
sl@0: 			}
sl@0: 
sl@0: 		if (i < 0) return(i);
sl@0: 
sl@0: 		bio=BIO_new_socket(i,BIO_CLOSE);
sl@0: 		if (bio == NULL) goto err;
sl@0: 
sl@0: 		BIO_set_callback(bio,BIO_get_callback(b));
sl@0: 		BIO_set_callback_arg(bio,BIO_get_callback_arg(b));
sl@0: 
sl@0: 		if (c->nbio)
sl@0: 			{
sl@0: 			if (!BIO_socket_nbio(i,1))
sl@0: 				{
sl@0: 				BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET);
sl@0: 				goto err;
sl@0: 				}
sl@0: 			}
sl@0: 
sl@0: 		/* If the accept BIO has an bio_chain, we dup it and
sl@0: 		 * put the new socket at the end. */
sl@0: 		if (c->bio_chain != NULL)
sl@0: 			{
sl@0: 			if ((dbio=BIO_dup_chain(c->bio_chain)) == NULL)
sl@0: 				goto err;
sl@0: 			if (!BIO_push(dbio,bio)) goto err;
sl@0: 			bio=dbio;
sl@0: 			}
sl@0: 		if (BIO_push(b,bio) == NULL) goto err;
sl@0: 
sl@0: 		c->state=ACPT_S_OK;
sl@0: 		return(1);
sl@0: err:
sl@0: 		if (bio != NULL)
sl@0: 			BIO_free(bio);
sl@0: 		else if (s >= 0)
sl@0: 			closesocket(s);
sl@0: 		return(0);
sl@0: 		/* break; */
sl@0: 	case ACPT_S_OK:
sl@0: 		if (b->next_bio == NULL)
sl@0: 			{
sl@0: 			c->state=ACPT_S_GET_ACCEPT_SOCKET;
sl@0: 			goto again;
sl@0: 			}
sl@0: 		return(1);
sl@0: 		/* break; */
sl@0: 	default:	
sl@0: 		return(0);
sl@0: 		/* break; */
sl@0: 		}
sl@0: 
sl@0: 	}
sl@0: 
sl@0: static int acpt_read(BIO *b, char *out, int outl)
sl@0: 	{
sl@0: 	int ret=0;
sl@0: 	BIO_ACCEPT *data;
sl@0: 
sl@0: 	BIO_clear_retry_flags(b);
sl@0: 	data=(BIO_ACCEPT *)b->ptr;
sl@0: 
sl@0: 	while (b->next_bio == NULL)
sl@0: 		{
sl@0: 		ret=acpt_state(b,data);
sl@0: 		if (ret <= 0) return(ret);
sl@0: 		}
sl@0: 
sl@0: 	ret=BIO_read(b->next_bio,out,outl);
sl@0: 	BIO_copy_next_retry(b);
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static int acpt_write(BIO *b, const char *in, int inl)
sl@0: 	{
sl@0: 	int ret;
sl@0: 	BIO_ACCEPT *data;
sl@0: 
sl@0: 	BIO_clear_retry_flags(b);
sl@0: 	data=(BIO_ACCEPT *)b->ptr;
sl@0: 
sl@0: 	while (b->next_bio == NULL)
sl@0: 		{
sl@0: 		ret=acpt_state(b,data);
sl@0: 		if (ret <= 0) return(ret);
sl@0: 		}
sl@0: 
sl@0: 	ret=BIO_write(b->next_bio,in,inl);
sl@0: 	BIO_copy_next_retry(b);
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static long acpt_ctrl(BIO *b, int cmd, long num, void *ptr)
sl@0: 	{
sl@0: 	BIO *dbio;
sl@0: 	int *ip;
sl@0: 	long ret=1;
sl@0: 	BIO_ACCEPT *data;
sl@0: 	char **pp;
sl@0: 
sl@0: 	data=(BIO_ACCEPT *)b->ptr;
sl@0: 
sl@0: 	switch (cmd)
sl@0: 		{
sl@0: 	case BIO_CTRL_RESET:
sl@0: 		ret=0;
sl@0: 		data->state=ACPT_S_BEFORE;
sl@0: 		acpt_close_socket(b);
sl@0: 		b->flags=0;
sl@0: 		break;
sl@0: 	case BIO_C_DO_STATE_MACHINE:
sl@0: 		/* use this one to start the connection */
sl@0: 		ret=(long)acpt_state(b,data);
sl@0: 		break;
sl@0: 	case BIO_C_SET_ACCEPT:
sl@0: 		if (ptr != NULL)
sl@0: 			{
sl@0: 			if (num == 0)
sl@0: 				{
sl@0: 				b->init=1;
sl@0: 				if (data->param_addr != NULL)
sl@0: 					OPENSSL_free(data->param_addr);
sl@0: 				data->param_addr=BUF_strdup(ptr);
sl@0: 				}
sl@0: 			else if (num == 1)
sl@0: 				{
sl@0: 				data->accept_nbio=(ptr != NULL);
sl@0: 				}
sl@0: 			else if (num == 2)
sl@0: 				{
sl@0: 				if (data->bio_chain != NULL)
sl@0: 					BIO_free(data->bio_chain);
sl@0: 				data->bio_chain=(BIO *)ptr;
sl@0: 				}
sl@0: 			}
sl@0: 		break;
sl@0: 	case BIO_C_SET_NBIO:
sl@0: 		data->nbio=(int)num;
sl@0: 		break;
sl@0: 	case BIO_C_SET_FD:
sl@0: 		b->init=1;
sl@0: 		b->num= *((int *)ptr);
sl@0: 		data->accept_sock=b->num;
sl@0: 		data->state=ACPT_S_GET_ACCEPT_SOCKET;
sl@0: 		b->shutdown=(int)num;
sl@0: 		b->init=1;
sl@0: 		break;
sl@0: 	case BIO_C_GET_FD:
sl@0: 		if (b->init)
sl@0: 			{
sl@0: 			ip=(int *)ptr;
sl@0: 			if (ip != NULL)
sl@0: 				*ip=data->accept_sock;
sl@0: 			ret=data->accept_sock;
sl@0: 			}
sl@0: 		else
sl@0: 			ret= -1;
sl@0: 		break;
sl@0: 	case BIO_C_GET_ACCEPT:
sl@0: 		if (b->init)
sl@0: 			{
sl@0: 			if (ptr != NULL)
sl@0: 				{
sl@0: 				pp=(char **)ptr;
sl@0: 				*pp=data->param_addr;
sl@0: 				}
sl@0: 			else
sl@0: 				ret= -1;
sl@0: 			}
sl@0: 		else
sl@0: 			ret= -1;
sl@0: 		break;
sl@0: 	case BIO_CTRL_GET_CLOSE:
sl@0: 		ret=b->shutdown;
sl@0: 		break;
sl@0: 	case BIO_CTRL_SET_CLOSE:
sl@0: 		b->shutdown=(int)num;
sl@0: 		break;
sl@0: 	case BIO_CTRL_PENDING:
sl@0: 	case BIO_CTRL_WPENDING:
sl@0: 		ret=0;
sl@0: 		break;
sl@0: 	case BIO_CTRL_FLUSH:
sl@0: 		break;
sl@0: 	case BIO_C_SET_BIND_MODE:
sl@0: 		data->bind_mode=(int)num;
sl@0: 		break;
sl@0: 	case BIO_C_GET_BIND_MODE:
sl@0: 		ret=(long)data->bind_mode;
sl@0: 		break;
sl@0: 	case BIO_CTRL_DUP:
sl@0: 		dbio=(BIO *)ptr;
sl@0: /*		if (data->param_port) EAY EAY
sl@0: 			BIO_set_port(dbio,data->param_port);
sl@0: 		if (data->param_hostname)
sl@0: 			BIO_set_hostname(dbio,data->param_hostname);
sl@0: 		BIO_set_nbio(dbio,data->nbio); */
sl@0: 		break;
sl@0: 
sl@0: 	default:
sl@0: 		ret=0;
sl@0: 		break;
sl@0: 		}
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static int acpt_puts(BIO *bp, const char *str)
sl@0: 	{
sl@0: 	int n,ret;
sl@0: 
sl@0: 	n=strlen(str);
sl@0: 	ret=acpt_write(bp,str,n);
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C BIO *BIO_new_accept(char *str)
sl@0: 	{
sl@0: 	BIO *ret;
sl@0: 
sl@0: 	ret=BIO_new(BIO_s_accept());
sl@0: 	if (ret == NULL) return(NULL);
sl@0: 	if (BIO_set_accept_port(ret,str))
sl@0: 		return(ret);
sl@0: 	else
sl@0: 		{
sl@0: 		BIO_free(ret);
sl@0: 		return(NULL);
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: #endif