/* 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>
#if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
#include "netdb.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
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 **)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
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;
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);
}
void BIO_sock_cleanup(void)
{
#ifdef OPENSSL_SYS_WINDOWS
if (wsa_init_done)
{
wsa_init_done=0;
#ifndef OPENSSL_SYS_WINCE
WSACancelBlockingCall(); /* Winsock 1.1 specific */
#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
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);
}
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);
}
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