/* 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