/* crypto/bio/b_sock.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 <stdlib.h>

 #include <errno.h>

 #define USE_SOCKETS

 #include "cryptlib.h"

 #include <openssl/bio.h>

 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)

 #include "netdb.h"

 #endif

 #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

 #ifdef SO_MAXCONN

 #define MAX_LISTEN  SO_MAXCONN

 #elif defined(SOMAXCONN)

 #define MAX_LISTEN  SOMAXCONN

 #else

 #define MAX_LISTEN  32

 #endif

 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))

 static int wsa_init_done=0;

 #endif

 #if 0

 static unsigned long BIO_ghbn_hits=0L;

 static unsigned long BIO_ghbn_miss=0L;

 #define GHBN_NUM	4

 static struct ghbn_cache_st

 	{

 	char name[129];

 	struct hostent *ent;

 	unsigned long order;

 	} ghbn_cache[GHBN_NUM];

 #endif

 static int get_ip(const char *str,unsigned char *ip);

 #if 0

 static void ghbn_free(struct hostent *a);

 static struct hostent *ghbn_dup(struct hostent *a);

 #endif

 EXPORT_C int BIO_get_host_ip(const char *str, unsigned char *ip)

 	{

 	int i;

 	int err = 1;

 	int locked = 0;

 	struct hostent *he;

 	i=get_ip(str,ip);

 	if (i < 0)

 		{

 		BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);

 		goto err;

 		}

 	/* At this point, we have something that is most probably correct

 	   in some way, so let's init the socket. */

 	if (BIO_sock_init() != 1)

 		return 0; /* don't generate another error code here */

 	/* If the string actually contained an IP address, we need not do

 	   anything more */

 	if (i > 0) return(1);

 	/* do a gethostbyname */

 	CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);

 	locked = 1;

 	he=BIO_gethostbyname(str);

 	if (he == NULL)

 		{

 		BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);

 		goto err;

 		}

 	/* cast to short because of win16 winsock definition */

 	if ((short)he->h_addrtype != AF_INET)

 		{

 		BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);

 		goto err;

 		}

 	for (i=0; i<4; i++)

 		ip[i]=he->h_addr_list[0][i];

 	err = 0;

  err:

 	if (locked)

 		CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);

 	if (err)

 		{

 		ERR_add_error_data(2,"host=",str);

 		return 0;

 		}

 	else

 		return 1;

 	}

 EXPORT_C int BIO_get_port(const char *str, unsigned short *port_ptr)

 	{

 	int i;

 	struct servent *s;

 	if (str == NULL)

 		{

 		BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);

 		return(0);

 		}

 	i=atoi(str);

 	if (i != 0)

 		*port_ptr=(unsigned short)i;

 	else

 		{

 		CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);

 		/* Note: under VMS with SOCKETSHR, it seems like the first

 		 * parameter is 'char *', instead of 'const char *'

 		 */

  		s=getservbyname(

 #ifndef CONST_STRICT

 		    (char *)

 #endif

 		    str,"tcp");

 		if(s != NULL)

 			*port_ptr=ntohs((unsigned short)s->s_port);

 		CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);

 		if(s == NULL)

 			{

 			if (strcmp(str,"http") == 0)

 				*port_ptr=80;

 			else if (strcmp(str,"telnet") == 0)

 				*port_ptr=23;

 			else if (strcmp(str,"socks") == 0)

 				*port_ptr=1080;

 			else if (strcmp(str,"https") == 0)

 				*port_ptr=443;

 			else if (strcmp(str,"ssl") == 0)

 				*port_ptr=443;

 			else if (strcmp(str,"ftp") == 0)

 				*port_ptr=21;

 			else if (strcmp(str,"gopher") == 0)

 				*port_ptr=70;

 #if 0

 			else if (strcmp(str,"wais") == 0)

 				*port_ptr=21;

 #endif

 			else

 				{

 				SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());

 				ERR_add_error_data(3,"service='",str,"'");

 				return(0);

 				}

 			}

 		}

 	return(1);

 	}

 EXPORT_C int BIO_sock_error(int sock)

 	{

 	int j,i;

 	int size;

 	size=sizeof(int);

 	/* Note: under Windows the third parameter is of type (char *)

 	 * whereas under other systems it is (void *) if you don't have

 	 * a cast it will choke the compiler: if you do have a cast then

 	 * you can either go for (char *) or (void *).

 	 */

 	i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);

 	if (i < 0)

 		return(1);

 	else

 		return(j);

 	}

 #if 0

 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)

 	{

 	int i;

 	char **p;

 	switch (cmd)

 		{

 	case BIO_GHBN_CTRL_HITS:

 		return(BIO_ghbn_hits);

 		/* break; */

 	case BIO_GHBN_CTRL_MISSES:

 		return(BIO_ghbn_miss);

 		/* break; */

 	case BIO_GHBN_CTRL_CACHE_SIZE:

 		return(GHBN_NUM);

 		/* break; */

 	case BIO_GHBN_CTRL_GET_ENTRY:

 		if ((iarg >= 0) && (iarg <GHBN_NUM) &&

 			(ghbn_cache[iarg].order > 0))

 			{

 			p=(char **)parg;

 			if (p == NULL) return(0);

 			*p=ghbn_cache[iarg].name;

 			ghbn_cache[iarg].name[128]='\0';

 			return(1);

 			}

 		return(0);

 		/* break; */

 	case BIO_GHBN_CTRL_FLUSH:

 		for (i=0; i<GHBN_NUM; i++)

 			ghbn_cache[i].order=0;

 		break;

 	default:

 		return(0);

 		}

 	return(1);

 	}

 #endif

 #if 0

 static struct hostent *ghbn_dup(struct hostent *a)

 	{

 	struct hostent *ret;

 	int i,j;

 	MemCheck_off();

 	ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));

 	if (ret == NULL) return(NULL);

 	memset(ret,0,sizeof(struct hostent));

 	for (i=0; a->h_aliases[i] != NULL; i++)

 		;

 	i++;

 	ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));

 	if (ret->h_aliases == NULL)

 		goto err;

 	memset(ret->h_aliases, 0, i*sizeof(char *));

 	for (i=0; a->h_addr_list[i] != NULL; i++)

 		;

 	i++;

 	ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));

 	if (ret->h_addr_list == NULL)

 		goto err;

 	memset(ret->h_addr_list, 0, i*sizeof(char *));

 	j=strlen(a->h_name)+1;

 	if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;

 	memcpy((char *)ret->h_name,a->h_name,j);

 	for (i=0; a->h_aliases[i] != NULL; i++)

 		{

 		j=strlen(a->h_aliases[i])+1;

 		if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;

 		memcpy(ret->h_aliases[i],a->h_aliases[i],j);

 		}

 	ret->h_length=a->h_length;

 	ret->h_addrtype=a->h_addrtype;

 	for (i=0; a->h_addr_list[i] != NULL; i++)

 		{

 		if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)

 			goto err;

 		memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);

 		}

 	if (0)

 		{

 err:	

 		if (ret != NULL)

 			ghbn_free(ret);

 		ret=NULL;

 		}

 	MemCheck_on();

 	return(ret);

 	}

 static void ghbn_free(struct hostent *a)

 	{

 	int i;

 	if(a == NULL)

 	    return;

 	if (a->h_aliases != NULL)

 		{

 		for (i=0; a->h_aliases[i] != NULL; i++)

 			OPENSSL_free(a->h_aliases[i]);

 		OPENSSL_free(a->h_aliases);

 		}

 	if (a->h_addr_list != NULL)

 		{

 		for (i=0; a->h_addr_list[i] != NULL; i++)

 			OPENSSL_free(a->h_addr_list[i]);

 		OPENSSL_free(a->h_addr_list);

 		}

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

 	OPENSSL_free(a);

 	}

 #endif

 EXPORT_C struct hostent *BIO_gethostbyname(const char *name)

 	{

 #if 1

 	/* Caching gethostbyname() results forever is wrong,

 	 * so we have to let the true gethostbyname() worry about this */

 	return gethostbyname(name);

 #else

 	struct hostent *ret;

 	int i,lowi=0,j;

 	unsigned long low= (unsigned long)-1;

 #  if 0

 	/* It doesn't make sense to use locking here: The function interface

 	 * is not thread-safe, because threads can never be sure when

 	 * some other thread destroys the data they were given a pointer to.

 	 */

 	CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);

 #  endif

 	j=strlen(name);

 	if (j < 128)

 		{

 		for (i=0; i<GHBN_NUM; i++)

 			{

 			if (low > ghbn_cache[i].order)

 				{

 				low=ghbn_cache[i].order;

 				lowi=i;

 				}

 			if (ghbn_cache[i].order > 0)

 				{

 				if (strncmp(name,ghbn_cache[i].name,128) == 0)

 					break;

 				}

 			}

 		}

 	else

 		i=GHBN_NUM;

 	if (i == GHBN_NUM) /* no hit*/

 		{

 		BIO_ghbn_miss++;

 		/* Note: under VMS with SOCKETSHR, it seems like the first

 		 * parameter is 'char *', instead of 'const char *'

 		 */

 		ret=gethostbyname(

 #  ifndef CONST_STRICT

 		    (char *)

 #  endif

 		    name);

 		if (ret == NULL)

 			goto end;

 		if (j > 128) /* too big to cache */

 			{

 #  if 0

 			/* If we were trying to make this function thread-safe (which

 			 * is bound to fail), we'd have to give up in this case

 			 * (or allocate more memory). */

 			ret = NULL;

 #  endif

 			goto end;

 			}

 		/* else add to cache */

 		if (ghbn_cache[lowi].ent != NULL)

 			ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */

 		ghbn_cache[lowi].name[0] = '\0';

 		if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)

 			{

 			BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);

 			goto end;

 			}

 		strncpy(ghbn_cache[lowi].name,name,128);

 		ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;

 		}

 	else

 		{

 		BIO_ghbn_hits++;

 		ret= ghbn_cache[i].ent;

 		ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;

 		}

 end:

 #  if 0

 	CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);

 #  endif

 	return(ret);

 #endif

 	}

 EXPORT_C int BIO_sock_init(void)

 	{

 #ifdef OPENSSL_SYS_WINDOWS

 	static struct WSAData wsa_state;

 	if (!wsa_init_done)

 		{

 		int err;

 		wsa_init_done=1;

 		memset(&wsa_state,0,sizeof(wsa_state));

 		if (WSAStartup(0x0101,&wsa_state)!=0)

 			{

 			err=WSAGetLastError();

 			SYSerr(SYS_F_WSASTARTUP,err);

 			BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);

 			return(-1);

 			}

 		}

 #endif /* OPENSSL_SYS_WINDOWS */

 #ifdef WATT32

 	extern int _watt_do_exit;

 	_watt_do_exit = 0;    /* don't make sock_init() call exit() */

 	if (sock_init())

 		return (-1);

 #endif

 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)

     WORD wVerReq;

     WSADATA wsaData;

     int err;

     if (!wsa_init_done)

     {

         wsa_init_done=1;

         wVerReq = MAKEWORD( 2, 0 );

         err = WSAStartup(wVerReq,&wsaData);

         if (err != 0)

         {

             SYSerr(SYS_F_WSASTARTUP,err);

             BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);

             return(-1);

 			}

 		}

 #endif

 	return(1);

 	}

 EXPORT_C void BIO_sock_cleanup(void)

 	{

 #ifdef OPENSSL_SYS_WINDOWS

 	if (wsa_init_done)

 		{

 		wsa_init_done=0;

 #ifndef OPENSSL_SYS_WINCE

 		WSACancelBlockingCall();

 #endif

 		WSACleanup();

 		}

 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)

    if (wsa_init_done)

         {

         wsa_init_done=0;

         WSACleanup();

 		}

 #endif

 	}

 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000

 EXPORT_C int BIO_socket_ioctl(int fd, long type, void *arg)

 	{

 	int i;

 #ifdef __DJGPP__

 	i=ioctlsocket(fd,type,(char *)arg);

 #else

 	i=ioctlsocket(fd,type,arg);

 #endif /* __DJGPP__ */

 	if (i < 0)

 		SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());

 	return(i);

 	}

 #endif /* __VMS_VER */

 /* The reason I have implemented this instead of using sscanf is because

  * Visual C 1.52c gives an unresolved external when linking a DLL :-( */

 static int get_ip(const char *str, unsigned char ip[4])

 	{

 	unsigned int tmp[4];

 	int num=0,c,ok=0;

 	tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;

 	for (;;)

 		{

 		c= *(str++);

 		if ((c >= '0') && (c <= '9'))

 			{

 			ok=1;

 			tmp[num]=tmp[num]*10+c-'0';

 			if (tmp[num] > 255) return(0);

 			}

 		else if (c == '.')

 			{

 			if (!ok) return(-1);

 			if (num == 3) return(0);

 			num++;

 			ok=0;

 			}

 		else if (c == '\0' && (num == 3) && ok)

 			break;

 		else

 			return(0);

 		}

 	ip[0]=tmp[0];

 	ip[1]=tmp[1];

 	ip[2]=tmp[2];

 	ip[3]=tmp[3];

 	return(1);

 	}

 EXPORT_C int BIO_get_accept_socket(char *host, int bind_mode)

 	{

 	int ret=0;

 	struct sockaddr_in server,client;

 	int s=INVALID_SOCKET,cs;

 	unsigned char ip[4];

 	unsigned short port;

 	char *str=NULL,*e;

 	const char *h,*p;

 	unsigned long l;

 	int err_num;

 	if (BIO_sock_init() != 1) return(INVALID_SOCKET);

 	if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);

 	h=p=NULL;

 	h=str;

 	for (e=str; *e; e++)

 		{

 		if (*e == ':')

 			{

 			p= &(e[1]);

 			*e='\0';

 			}

 		else if (*e == '/')

 			{

 			*e='\0';

 			break;

 			}

 		}

 	if (p == NULL)

 		{

 		p=h;

 		h="*";

 		}

 	if (!BIO_get_port(p,&port)) goto err;

 	memset((char *)&server,0,sizeof(server));

 	server.sin_family=AF_INET;

 	server.sin_port=htons(port);

 	if (strcmp(h,"*") == 0)

 		server.sin_addr.s_addr=INADDR_ANY;

 	else

 		{

                 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;

 		l=(unsigned long)

 			((unsigned long)ip[0]<<24L)|

 			((unsigned long)ip[1]<<16L)|

 			((unsigned long)ip[2]<< 8L)|

 			((unsigned long)ip[3]);

 		server.sin_addr.s_addr=htonl(l);

 		}

 again:

 	s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);

 	if (s == INVALID_SOCKET)

 		{

 		SYSerr(SYS_F_SOCKET,get_last_socket_error());

 		ERR_add_error_data(3,"port='",host,"'");

 		BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);

 		goto err;

 		}

 #ifdef SO_REUSEADDR

 	if (bind_mode == BIO_BIND_REUSEADDR)

 		{

 		int i=1;

 		ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));

 		bind_mode=BIO_BIND_NORMAL;

 		}

 #endif

 	if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)

 		{

 #ifdef SO_REUSEADDR

 		err_num=get_last_socket_error();

 		if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&

 			(err_num == EADDRINUSE))

 			{

 			memcpy((char *)&client,(char *)&server,sizeof(server));

 			if (strcmp(h,"*") == 0)

 				client.sin_addr.s_addr=htonl(0x7F000001);

 			cs=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);

 			if (cs != INVALID_SOCKET)

 				{

 				int ii;

 				ii=connect(cs,(struct sockaddr *)&client,

 					sizeof(client));

 				closesocket(cs);

 				if (ii == INVALID_SOCKET)

 					{

 					bind_mode=BIO_BIND_REUSEADDR;

 					closesocket(s);

 					goto again;

 					}

 				/* else error */

 				}

 			/* else error */

 			}

 #endif

 		SYSerr(SYS_F_BIND,err_num);

 		ERR_add_error_data(3,"port='",host,"'");

 		BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);

 		goto err;

 		}

 	if (listen(s,MAX_LISTEN) == -1)

 		{

 		SYSerr(SYS_F_BIND,get_last_socket_error());

 		ERR_add_error_data(3,"port='",host,"'");

 		BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);

 		goto err;

 		}

 	ret=1;

 err:

 	if (str != NULL) OPENSSL_free(str);

 	if ((ret == 0) && (s != INVALID_SOCKET))

 		{

 		closesocket(s);

 		s= INVALID_SOCKET;

 		}

 	return(s);

 	}

 #ifdef	EMULATOR

 GET_STATIC_VAR_FROM_TLS(from,b_sock,struct sockaddr_in)

 #define from (*GET_WSD_VAR_NAME(from,b_sock, s)())

 #endif

 EXPORT_C int BIO_accept(int sock, char **addr)

 	{

 	int ret=INVALID_SOCKET;

 #ifndef	EMULATOR

 	static struct sockaddr_in from;

 #endif

 	unsigned long l;

 	unsigned short port;

 	int len;

 	char *p;

 	memset((char *)&from,0,sizeof(from));

 	len=sizeof(from);

 	/* Note: under VMS with SOCKETSHR the fourth parameter is currently

 	 * of type (int *) whereas under other systems it is (void *) if

 	 * you don't have a cast it will choke the compiler: if you do

 	 * have a cast then you can either go for (int *) or (void *).

 	 */

 	ret=accept(sock,(struct sockaddr *)&from,(void *)&len);

 	if (ret == INVALID_SOCKET)

 		{

 		if(BIO_sock_should_retry(ret)) return -2;

 		SYSerr(SYS_F_ACCEPT,get_last_socket_error());

 		BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);

 		goto end;

 		}

 	if (addr == NULL) goto end;

 	l=ntohl(from.sin_addr.s_addr);

 	port=ntohs(from.sin_port);

 	if (*addr == NULL)

 		{

 		if ((p=OPENSSL_malloc(24)) == NULL)

 			{

 			BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);

 			goto end;

 			}

 		*addr=p;

 		}

 	BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d",

 		     (unsigned char)(l>>24L)&0xff,

 		     (unsigned char)(l>>16L)&0xff,

 		     (unsigned char)(l>> 8L)&0xff,

 		     (unsigned char)(l     )&0xff,

 		     port);

 end:

 	return(ret);

 	}

 EXPORT_C int BIO_set_tcp_ndelay(int s, int on)

 	{

 	int ret=0;

 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))

 	int opt;

 #ifdef SOL_TCP

 	opt=SOL_TCP;

 #else

 #ifdef IPPROTO_TCP

 	opt=IPPROTO_TCP;

 #endif

 #endif

 	ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));

 #endif

 	return(ret == 0);

 	}

 #endif

 EXPORT_C int BIO_socket_nbio(int s, int mode)

 	{

 	int ret= -1;

 	int l;

 	l=mode;

 #ifdef FIONBIO

 	ret=BIO_socket_ioctl(s,FIONBIO,&l); 

 #endif

 	return(ret == 0);

 	}