1 /* crypto/bio/b_sock.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
59 #ifndef OPENSSL_NO_SOCK
66 #include <openssl/bio.h>
68 #ifdef OPENSSL_SYS_WIN16
69 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
71 #define SOCKET_PROTOCOL IPPROTO_TCP
75 #define MAX_LISTEN SO_MAXCONN
76 #elif defined(SOMAXCONN)
77 #define MAX_LISTEN SOMAXCONN
82 #ifdef OPENSSL_SYS_WINDOWS
83 static int wsa_init_done
=0;
86 static unsigned long BIO_ghbn_hits
=0L;
87 static unsigned long BIO_ghbn_miss
=0L;
90 static struct ghbn_cache_st
95 } ghbn_cache
[GHBN_NUM
];
97 static int get_ip(const char *str
,unsigned char *ip
);
99 static void ghbn_free(struct hostent
*a
);
100 static struct hostent
*ghbn_dup(struct hostent
*a
);
102 int BIO_get_host_ip(const char *str
, unsigned char *ip
)
112 BIOerr(BIO_F_BIO_GET_HOST_IP
,BIO_R_INVALID_IP_ADDRESS
);
116 /* At this point, we have something that is most probably correct
117 in some way, so let's init the socket. */
118 if (BIO_sock_init() != 1)
119 return 0; /* don't generate another error code here */
121 /* If the string actually contained an IP address, we need not do
123 if (i
> 0) return(1);
125 /* do a gethostbyname */
126 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME
);
128 he
=BIO_gethostbyname(str
);
131 BIOerr(BIO_F_BIO_GET_HOST_IP
,BIO_R_BAD_HOSTNAME_LOOKUP
);
135 /* cast to short because of win16 winsock definition */
136 if ((short)he
->h_addrtype
!= AF_INET
)
138 BIOerr(BIO_F_BIO_GET_HOST_IP
,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET
);
142 ip
[i
]=he
->h_addr_list
[0][i
];
147 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME
);
150 ERR_add_error_data(2,"host=",str
);
157 int BIO_get_port(const char *str
, unsigned short *port_ptr
)
164 BIOerr(BIO_F_BIO_GET_PORT
,BIO_R_NO_PORT_DEFINED
);
169 *port_ptr
=(unsigned short)i
;
172 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME
);
173 /* Note: under VMS with SOCKETSHR, it seems like the first
174 * parameter is 'char *', instead of 'const char *'
182 *port_ptr
=ntohs((unsigned short)s
->s_port
);
183 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME
);
186 if (strcmp(str
,"http") == 0)
188 else if (strcmp(str
,"telnet") == 0)
190 else if (strcmp(str
,"socks") == 0)
192 else if (strcmp(str
,"https") == 0)
194 else if (strcmp(str
,"ssl") == 0)
196 else if (strcmp(str
,"ftp") == 0)
198 else if (strcmp(str
,"gopher") == 0)
201 else if (strcmp(str
,"wais") == 0)
206 SYSerr(SYS_F_GETSERVBYNAME
,get_last_socket_error());
207 ERR_add_error_data(3,"service='",str
,"'");
215 int BIO_sock_error(int sock
)
221 /* Note: under Windows the third parameter is of type (char *)
222 * whereas under other systems it is (void *) if you don't have
223 * a cast it will choke the compiler: if you do have a cast then
224 * you can either go for (char *) or (void *).
226 i
=getsockopt(sock
,SOL_SOCKET
,SO_ERROR
,(void *)&j
,(void *)&size
);
233 long BIO_ghbn_ctrl(int cmd
, int iarg
, char *parg
)
240 case BIO_GHBN_CTRL_HITS
:
241 return(BIO_ghbn_hits
);
243 case BIO_GHBN_CTRL_MISSES
:
244 return(BIO_ghbn_miss
);
246 case BIO_GHBN_CTRL_CACHE_SIZE
:
249 case BIO_GHBN_CTRL_GET_ENTRY
:
250 if ((iarg
>= 0) && (iarg
<GHBN_NUM
) &&
251 (ghbn_cache
[iarg
].order
> 0))
254 if (p
== NULL
) return(0);
255 *p
=ghbn_cache
[iarg
].name
;
256 ghbn_cache
[iarg
].name
[128]='\0';
261 case BIO_GHBN_CTRL_FLUSH
:
262 for (i
=0; i
<GHBN_NUM
; i
++)
263 ghbn_cache
[i
].order
=0;
272 static struct hostent
*ghbn_dup(struct hostent
*a
)
278 ret
=(struct hostent
*)OPENSSL_malloc(sizeof(struct hostent
));
279 if (ret
== NULL
) return(NULL
);
280 memset(ret
,0,sizeof(struct hostent
));
282 for (i
=0; a
->h_aliases
[i
] != NULL
; i
++)
285 ret
->h_aliases
= (char **)OPENSSL_malloc(i
*sizeof(char *));
286 if (ret
->h_aliases
== NULL
)
288 memset(ret
->h_aliases
, 0, i
*sizeof(char *));
290 for (i
=0; a
->h_addr_list
[i
] != NULL
; i
++)
293 ret
->h_addr_list
=(char **)OPENSSL_malloc(i
*sizeof(char *));
294 if (ret
->h_addr_list
== NULL
)
296 memset(ret
->h_addr_list
, 0, i
*sizeof(char *));
298 j
=strlen(a
->h_name
)+1;
299 if ((ret
->h_name
=OPENSSL_malloc(j
)) == NULL
) goto err
;
300 memcpy((char *)ret
->h_name
,a
->h_name
,j
);
301 for (i
=0; a
->h_aliases
[i
] != NULL
; i
++)
303 j
=strlen(a
->h_aliases
[i
])+1;
304 if ((ret
->h_aliases
[i
]=OPENSSL_malloc(j
)) == NULL
) goto err
;
305 memcpy(ret
->h_aliases
[i
],a
->h_aliases
[i
],j
);
307 ret
->h_length
=a
->h_length
;
308 ret
->h_addrtype
=a
->h_addrtype
;
309 for (i
=0; a
->h_addr_list
[i
] != NULL
; i
++)
311 if ((ret
->h_addr_list
[i
]=OPENSSL_malloc(a
->h_length
)) == NULL
)
313 memcpy(ret
->h_addr_list
[i
],a
->h_addr_list
[i
],a
->h_length
);
326 static void ghbn_free(struct hostent
*a
)
333 if (a
->h_aliases
!= NULL
)
335 for (i
=0; a
->h_aliases
[i
] != NULL
; i
++)
336 OPENSSL_free(a
->h_aliases
[i
]);
337 OPENSSL_free(a
->h_aliases
);
339 if (a
->h_addr_list
!= NULL
)
341 for (i
=0; a
->h_addr_list
[i
] != NULL
; i
++)
342 OPENSSL_free(a
->h_addr_list
[i
]);
343 OPENSSL_free(a
->h_addr_list
);
345 if (a
->h_name
!= NULL
) OPENSSL_free(a
->h_name
);
351 struct hostent
*BIO_gethostbyname(const char *name
)
354 /* Caching gethostbyname() results forever is wrong,
355 * so we have to let the true gethostbyname() worry about this */
356 return gethostbyname(name
);
360 unsigned long low
= (unsigned long)-1;
364 /* It doesn't make sense to use locking here: The function interface
365 * is not thread-safe, because threads can never be sure when
366 * some other thread destroys the data they were given a pointer to.
368 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME
);
373 for (i
=0; i
<GHBN_NUM
; i
++)
375 if (low
> ghbn_cache
[i
].order
)
377 low
=ghbn_cache
[i
].order
;
380 if (ghbn_cache
[i
].order
> 0)
382 if (strncmp(name
,ghbn_cache
[i
].name
,128) == 0)
390 if (i
== GHBN_NUM
) /* no hit*/
393 /* Note: under VMS with SOCKETSHR, it seems like the first
394 * parameter is 'char *', instead of 'const char *'
397 # ifndef CONST_STRICT
404 if (j
> 128) /* too big to cache */
407 /* If we were trying to make this function thread-safe (which
408 * is bound to fail), we'd have to give up in this case
409 * (or allocate more memory). */
415 /* else add to cache */
416 if (ghbn_cache
[lowi
].ent
!= NULL
)
417 ghbn_free(ghbn_cache
[lowi
].ent
); /* XXX not thread-safe */
418 ghbn_cache
[lowi
].name
[0] = '\0';
420 if((ret
=ghbn_cache
[lowi
].ent
=ghbn_dup(ret
)) == NULL
)
422 BIOerr(BIO_F_BIO_GETHOSTBYNAME
,ERR_R_MALLOC_FAILURE
);
425 strncpy(ghbn_cache
[lowi
].name
,name
,128);
426 ghbn_cache
[lowi
].order
=BIO_ghbn_miss
+BIO_ghbn_hits
;
431 ret
= ghbn_cache
[i
].ent
;
432 ghbn_cache
[i
].order
=BIO_ghbn_miss
+BIO_ghbn_hits
;
436 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME
);
443 int BIO_sock_init(void)
445 #ifdef OPENSSL_SYS_WINDOWS
446 static struct WSAData wsa_state
;
453 signal(SIGINT
,(void (*)(int))BIO_sock_cleanup
);
456 memset(&wsa_state
,0,sizeof(wsa_state
));
457 if (WSAStartup(0x0101,&wsa_state
)!=0)
459 err
=WSAGetLastError();
460 SYSerr(SYS_F_WSASTARTUP
,err
);
461 BIOerr(BIO_F_BIO_SOCK_INIT
,BIO_R_WSASTARTUP
);
465 #endif /* OPENSSL_SYS_WINDOWS */
469 void BIO_sock_cleanup(void)
471 #ifdef OPENSSL_SYS_WINDOWS
475 WSACancelBlockingCall();
481 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
483 int BIO_socket_ioctl(int fd
, long type
, unsigned long *arg
)
488 i
=ioctlsocket(fd
,type
,(char *)arg
);
490 i
=ioctlsocket(fd
,type
,arg
);
491 #endif /* __DJGPP__ */
493 SYSerr(SYS_F_IOCTLSOCKET
,get_last_socket_error());
496 #endif /* __VMS_VER */
498 /* The reason I have implemented this instead of using sscanf is because
499 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
500 static int get_ip(const char *str
, unsigned char ip
[4])
505 tmp
[0]=tmp
[1]=tmp
[2]=tmp
[3]=0;
510 if ((c
>= '0') && (c
<= '9'))
513 tmp
[num
]=tmp
[num
]*10+c
-'0';
514 if (tmp
[num
] > 255) return(0);
519 if (num
== 3) return(0);
523 else if (c
== '\0' && (num
== 3) && ok
)
535 int BIO_get_accept_socket(char *host
, int bind_mode
)
538 struct sockaddr_in server
,client
;
539 int s
=INVALID_SOCKET
,cs
;
547 if (BIO_sock_init() != 1) return(INVALID_SOCKET
);
549 if ((str
=BUF_strdup(host
)) == NULL
) return(INVALID_SOCKET
);
573 if (!BIO_get_port(p
,&port
)) goto err
;
575 memset((char *)&server
,0,sizeof(server
));
576 server
.sin_family
=AF_INET
;
577 server
.sin_port
=htons(port
);
579 if (strcmp(h
,"*") == 0)
580 server
.sin_addr
.s_addr
=INADDR_ANY
;
583 if (!BIO_get_host_ip(h
,&(ip
[0]))) goto err
;
585 ((unsigned long)ip
[0]<<24L)|
586 ((unsigned long)ip
[1]<<16L)|
587 ((unsigned long)ip
[2]<< 8L)|
588 ((unsigned long)ip
[3]);
589 server
.sin_addr
.s_addr
=htonl(l
);
593 s
=socket(AF_INET
,SOCK_STREAM
,SOCKET_PROTOCOL
);
594 if (s
== INVALID_SOCKET
)
596 SYSerr(SYS_F_SOCKET
,get_last_socket_error());
597 ERR_add_error_data(3,"port='",host
,"'");
598 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET
,BIO_R_UNABLE_TO_CREATE_SOCKET
);
603 if (bind_mode
== BIO_BIND_REUSEADDR
)
607 ret
=setsockopt(s
,SOL_SOCKET
,SO_REUSEADDR
,(char *)&i
,sizeof(i
));
608 bind_mode
=BIO_BIND_NORMAL
;
611 if (bind(s
,(struct sockaddr
*)&server
,sizeof(server
)) == -1)
614 err_num
=get_last_socket_error();
615 if ((bind_mode
== BIO_BIND_REUSEADDR_IF_UNUSED
) &&
616 (err_num
== EADDRINUSE
))
618 memcpy((char *)&client
,(char *)&server
,sizeof(server
));
619 if (strcmp(h
,"*") == 0)
620 client
.sin_addr
.s_addr
=htonl(0x7F000001);
621 cs
=socket(AF_INET
,SOCK_STREAM
,SOCKET_PROTOCOL
);
622 if (cs
!= INVALID_SOCKET
)
625 ii
=connect(cs
,(struct sockaddr
*)&client
,
628 if (ii
== INVALID_SOCKET
)
630 bind_mode
=BIO_BIND_REUSEADDR
;
639 SYSerr(SYS_F_BIND
,err_num
);
640 ERR_add_error_data(3,"port='",host
,"'");
641 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET
,BIO_R_UNABLE_TO_BIND_SOCKET
);
644 if (listen(s
,MAX_LISTEN
) == -1)
646 SYSerr(SYS_F_BIND
,get_last_socket_error());
647 ERR_add_error_data(3,"port='",host
,"'");
648 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET
,BIO_R_UNABLE_TO_LISTEN_SOCKET
);
653 if (str
!= NULL
) OPENSSL_free(str
);
654 if ((ret
== 0) && (s
!= INVALID_SOCKET
))
662 int BIO_accept(int sock
, char **addr
)
664 int ret
=INVALID_SOCKET
;
665 static struct sockaddr_in from
;
671 memset((char *)&from
,0,sizeof(from
));
673 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
674 * of type (int *) whereas under other systems it is (void *) if
675 * you don't have a cast it will choke the compiler: if you do
676 * have a cast then you can either go for (int *) or (void *).
678 ret
=accept(sock
,(struct sockaddr
*)&from
,(void *)&len
);
679 if (ret
== INVALID_SOCKET
)
681 if(BIO_sock_should_retry(ret
)) return -2;
682 SYSerr(SYS_F_ACCEPT
,get_last_socket_error());
683 BIOerr(BIO_F_BIO_ACCEPT
,BIO_R_ACCEPT_ERROR
);
687 if (addr
== NULL
) goto end
;
689 l
=ntohl(from
.sin_addr
.s_addr
);
690 port
=ntohs(from
.sin_port
);
693 if ((p
=OPENSSL_malloc(24)) == NULL
)
695 BIOerr(BIO_F_BIO_ACCEPT
,ERR_R_MALLOC_FAILURE
);
700 sprintf(*addr
,"%d.%d.%d.%d:%d",
701 (unsigned char)(l
>>24L)&0xff,
702 (unsigned char)(l
>>16L)&0xff,
703 (unsigned char)(l
>> 8L)&0xff,
704 (unsigned char)(l
)&0xff,
710 int BIO_set_tcp_ndelay(int s
, int on
)
713 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
724 ret
=setsockopt(s
,opt
,TCP_NODELAY
,(char *)&on
,sizeof(on
));
730 int BIO_socket_nbio(int s
, int mode
)
737 ret
=BIO_socket_ioctl(s
,FIONBIO
,&l
);