path: root/crypto/bio/b_sock.c

/* 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.]
 */

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

#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)
static int wsa_init_done=0;
#endif

#if 0
static unsigned long BIO_ghbn_hits=0L;
static unsigned long BIO_ghbn_miss=0L;

/* The following types are required to work in a 64-bit environment on
   OpenVMS for Alpha.  In that environment, the pointer types char_pp
   and char_p will be 32 bits wide.  In all other environments (including
   all other platforms), they will have whatever size is the appropriate
   default there.
   Additionally, let's define special variants of malloc and friends that
   give the expected result visavi 32-bit pointers in an otherwise 64-bit
   environment.  These would normally be declared with the OpenVMSy string.h,
   if we wouldn't compile with /STANDARD=ANSI.  */
#if !defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE == 64
#pragma __required_pointer_size __save
#pragma __required_pointer_size 32
#endif
typedef char ** char_pp;
typedef char * char_p;
#ifdef OPENSSL_SYS_VMS
void *_malloc32(size_t);
#define _free32 free
void *_memset32(void *__s, int __c, size_t __n);
#else
#define _malloc32 OPENSSL_malloc
#define _free32 OPENSSL_free
#define _memset32 memset
#endif
#if !defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE == 64
#pragma __required_pointer_size __restore
#endif

#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
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;
	}

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);
	}

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_pp)_malloc32(i*sizeof(char_p));  /* changed for both 32-bit & 64-bit */
	if (ret->h_aliases == NULL)
		goto err;
	_memset32(ret->h_aliases, 0, i*sizeof(char_p)); /* changed for both 32-bit & 64-bit */

	for (i=0; a->h_addr_list[i] != NULL; i++)
		;
	i++;
	ret->h_addr_list=(char_pp)_malloc32(i*sizeof(char_p)); /* changed for both 32-bit & 64-bit */
	if (ret->h_addr_list == NULL)
		goto err;
	_memset32(ret->h_addr_list, 0, i*sizeof(char_p)); /* changed for both 32-bit & 64-bit */

	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]=(char_p)_malloc32(j)) == NULL) goto err;  /* changed for both 32-bit & 64-bit */
		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]=(char_p)_malloc32(a->h_length)) == NULL)  /* changed for both 32-bit & 64-bit */
			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++)
			_free32(a->h_aliases[i]);
		_free32(a->h_aliases);
		}
	if (a->h_addr_list != NULL)
		{
		for (i=0; a->h_addr_list[i] != NULL; i++)
			_free32(a->h_addr_list[i]);
		_free32(a->h_addr_list);
		}
	if (a->h_name != NULL) OPENSSL_free(a->h_name);
	OPENSSL_free(a);
	}

#endif

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
	}


int BIO_sock_init(void)
	{
#ifdef OPENSSL_SYS_WINDOWS
	static struct WSAData wsa_state;

	if (!wsa_init_done)
		{
		int err;
	  
#ifdef SIGINT
		signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
#endif
		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)
    WORD wVerReq;
    WSADATA wsaData;
    int err;

    if (!wsa_init_done)
    {
   
# ifdef SIGINT
        signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
# endif

        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);
	}

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)
   if (wsa_init_done)
        {
        wsa_init_done=0;
        WSACleanup();
		}
#endif
	}

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

#ifdef OPENSSL_SYS_VMS
int BIO_socket_ioctl(int fd, long type, VOID_L32p arg)  /* changed for 64-bit API */
#else
int BIO_socket_ioctl(int fd, long type, void *arg)
#endif
	{
	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);
	}

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);
	}

int BIO_accept(int sock, char **addr)
	{
	int ret=INVALID_SOCKET;
	static struct sockaddr_in from;
	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);
	}

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

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);
	}