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.]
66 #include <openssl/bio.h>
69 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
71 #define SOCKET_PROTOCOL IPPROTO_TCP
75 #define MAX_LISTEN SOMAXCONN
76 #elif defined(SO_MAXCONN)
77 #define MAX_LISTEN SO_MAXCONN
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
);
98 static void ghbn_free(struct hostent
*a
);
99 static struct hostent
*ghbn_dup(struct hostent
*a
);
100 int BIO_get_host_ip(const char *str
, unsigned char *ip
)
110 BIOerr(BIO_F_BIO_GET_HOST_IP
,BIO_R_INVALID_IP_ADDRESS
);
114 /* At this point, we have something that is most probably correct
115 in some way, so let's init the socket. */
116 if (BIO_sock_init() != 1)
117 return 0; /* don't generate another error code here */
119 /* If the string actually contained an IP address, we need not do
121 if (i
> 0) return(1);
123 /* do a gethostbyname */
124 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME
);
126 he
=BIO_gethostbyname(str
);
129 BIOerr(BIO_F_BIO_GET_HOST_IP
,BIO_R_BAD_HOSTNAME_LOOKUP
);
133 /* cast to short because of win16 winsock definition */
134 if ((short)he
->h_addrtype
!= AF_INET
)
136 BIOerr(BIO_F_BIO_GET_HOST_IP
,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET
);
140 ip
[i
]=he
->h_addr_list
[0][i
];
145 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME
);
148 ERR_add_error_data(2,"host=",str
);
155 int BIO_get_port(const char *str
, unsigned short *port_ptr
)
162 BIOerr(BIO_F_BIO_GET_PORT
,BIO_R_NO_PORT_DEFINED
);
167 *port_ptr
=(unsigned short)i
;
170 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME
);
171 /* Note: under VMS with SOCKETSHR, it seems like the first
172 * parameter is 'char *', instead of 'const char *'
180 *port_ptr
=ntohs((unsigned short)s
->s_port
);
181 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME
);
184 if (strcmp(str
,"http") == 0)
186 else if (strcmp(str
,"telnet") == 0)
188 else if (strcmp(str
,"socks") == 0)
190 else if (strcmp(str
,"https") == 0)
192 else if (strcmp(str
,"ssl") == 0)
194 else if (strcmp(str
,"ftp") == 0)
196 else if (strcmp(str
,"gopher") == 0)
199 else if (strcmp(str
,"wais") == 0)
204 SYSerr(SYS_F_GETSERVBYNAME
,get_last_socket_error());
205 ERR_add_error_data(3,"service='",str
,"'");
213 int BIO_sock_error(int sock
)
219 /* Note: under Windows the third parameter is of type (char *)
220 * whereas under other systems it is (void *) if you don't have
221 * a cast it will choke the compiler: if you do have a cast then
222 * you can either go for (char *) or (void *).
224 i
=getsockopt(sock
,SOL_SOCKET
,SO_ERROR
,(void *)&j
,(void *)&size
);
231 long BIO_ghbn_ctrl(int cmd
, int iarg
, char *parg
)
238 case BIO_GHBN_CTRL_HITS
:
239 return(BIO_ghbn_hits
);
241 case BIO_GHBN_CTRL_MISSES
:
242 return(BIO_ghbn_miss
);
244 case BIO_GHBN_CTRL_CACHE_SIZE
:
247 case BIO_GHBN_CTRL_GET_ENTRY
:
248 if ((iarg
>= 0) && (iarg
<GHBN_NUM
) &&
249 (ghbn_cache
[iarg
].order
> 0))
252 if (p
== NULL
) return(0);
253 *p
=ghbn_cache
[iarg
].name
;
254 ghbn_cache
[iarg
].name
[128]='\0';
259 case BIO_GHBN_CTRL_FLUSH
:
260 for (i
=0; i
<GHBN_NUM
; i
++)
261 ghbn_cache
[i
].order
=0;
269 static struct hostent
*ghbn_dup(struct hostent
*a
)
275 ret
=(struct hostent
*)OPENSSL_malloc(sizeof(struct hostent
));
276 if (ret
== NULL
) return(NULL
);
277 memset(ret
,0,sizeof(struct hostent
));
279 for (i
=0; a
->h_aliases
[i
] != NULL
; i
++)
282 ret
->h_aliases
= (char **)OPENSSL_malloc(i
*sizeof(char *));
283 if (ret
->h_aliases
== NULL
)
285 memset(ret
->h_aliases
, 0, i
*sizeof(char *));
287 for (i
=0; a
->h_addr_list
[i
] != NULL
; i
++)
290 ret
->h_addr_list
=(char **)OPENSSL_malloc(i
*sizeof(char *));
291 if (ret
->h_addr_list
== NULL
)
293 memset(ret
->h_addr_list
, 0, i
*sizeof(char *));
295 j
=strlen(a
->h_name
)+1;
296 if ((ret
->h_name
=OPENSSL_malloc(j
)) == NULL
) goto err
;
297 memcpy((char *)ret
->h_name
,a
->h_name
,j
);
298 for (i
=0; a
->h_aliases
[i
] != NULL
; i
++)
300 j
=strlen(a
->h_aliases
[i
])+1;
301 if ((ret
->h_aliases
[i
]=OPENSSL_malloc(j
)) == NULL
) goto err
;
302 memcpy(ret
->h_aliases
[i
],a
->h_aliases
[i
],j
);
304 ret
->h_length
=a
->h_length
;
305 ret
->h_addrtype
=a
->h_addrtype
;
306 for (i
=0; a
->h_addr_list
[i
] != NULL
; i
++)
308 if ((ret
->h_addr_list
[i
]=OPENSSL_malloc(a
->h_length
)) == NULL
)
310 memcpy(ret
->h_addr_list
[i
],a
->h_addr_list
[i
],a
->h_length
);
323 static void ghbn_free(struct hostent
*a
)
330 if (a
->h_aliases
!= NULL
)
332 for (i
=0; a
->h_aliases
[i
] != NULL
; i
++)
333 OPENSSL_free(a
->h_aliases
[i
]);
334 OPENSSL_free(a
->h_aliases
);
336 if (a
->h_addr_list
!= NULL
)
338 for (i
=0; a
->h_addr_list
[i
] != NULL
; i
++)
339 OPENSSL_free(a
->h_addr_list
[i
]);
340 OPENSSL_free(a
->h_addr_list
);
342 if (a
->h_name
!= NULL
) OPENSSL_free(a
->h_name
);
346 struct hostent
*BIO_gethostbyname(const char *name
)
350 unsigned long low
= (unsigned long)-1;
352 /* return(gethostbyname(name)); */
354 #if 0 /* It doesn't make sense to use locking here: The function interface
355 * is not thread-safe, because threads can never be sure when
356 * some other thread destroys the data they were given a pointer to.
358 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME
);
363 for (i
=0; i
<GHBN_NUM
; i
++)
365 if (low
> ghbn_cache
[i
].order
)
367 low
=ghbn_cache
[i
].order
;
370 if (ghbn_cache
[i
].order
> 0)
372 if (strncmp(name
,ghbn_cache
[i
].name
,128) == 0)
380 if (i
== GHBN_NUM
) /* no hit*/
383 /* Note: under VMS with SOCKETSHR, it seems like the first
384 * parameter is 'char *', instead of 'const char *'
394 if (j
> 128) /* too big to cache */
396 #if 0 /* If we were trying to make this function thread-safe (which
397 * is bound to fail), we'd have to give up in this case
398 * (or allocate more memory). */
404 /* else add to cache */
405 if (ghbn_cache
[lowi
].ent
!= NULL
)
406 ghbn_free(ghbn_cache
[lowi
].ent
); /* XXX not thread-safe */
407 ghbn_cache
[lowi
].name
[0] = '\0';
409 if((ret
=ghbn_cache
[lowi
].ent
=ghbn_dup(ret
)) == NULL
)
411 BIOerr(BIO_F_BIO_GETHOSTBYNAME
,ERR_R_MALLOC_FAILURE
);
414 strncpy(ghbn_cache
[lowi
].name
,name
,128);
415 ghbn_cache
[lowi
].order
=BIO_ghbn_miss
+BIO_ghbn_hits
;
420 ret
= ghbn_cache
[i
].ent
;
421 ghbn_cache
[i
].order
=BIO_ghbn_miss
+BIO_ghbn_hits
;
425 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME
);
430 int BIO_sock_init(void)
433 static struct WSAData wsa_state
;
440 signal(SIGINT
,(void (*)(int))BIO_sock_cleanup
);
443 memset(&wsa_state
,0,sizeof(wsa_state
));
444 if (WSAStartup(0x0101,&wsa_state
)!=0)
446 err
=WSAGetLastError();
447 SYSerr(SYS_F_WSASTARTUP
,err
);
448 BIOerr(BIO_F_BIO_SOCK_INIT
,BIO_R_WSASTARTUP
);
456 void BIO_sock_cleanup(void)
462 WSACancelBlockingCall();
468 #if !defined(VMS) || __VMS_VER >= 70000000
470 int BIO_socket_ioctl(int fd
, long type
, unsigned long *arg
)
474 i
=ioctlsocket(fd
,type
,arg
);
476 SYSerr(SYS_F_IOCTLSOCKET
,get_last_socket_error());
479 #endif /* __VMS_VER */
481 /* The reason I have implemented this instead of using sscanf is because
482 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
483 static int get_ip(const char *str
, unsigned char ip
[4])
488 tmp
[0]=tmp
[1]=tmp
[2]=tmp
[3]=0;
493 if ((c
>= '0') && (c
<= '9'))
496 tmp
[num
]=tmp
[num
]*10+c
-'0';
497 if (tmp
[num
] > 255) return(-1);
506 else if ((num
== 3) && ok
)
518 int BIO_get_accept_socket(char *host
, int bind_mode
)
521 struct sockaddr_in server
,client
;
530 if (BIO_sock_init() != 1) return(INVALID_SOCKET
);
532 if ((str
=BUF_strdup(host
)) == NULL
) return(INVALID_SOCKET
);
556 if (!BIO_get_port(p
,&port
)) return(INVALID_SOCKET
);
558 memset((char *)&server
,0,sizeof(server
));
559 server
.sin_family
=AF_INET
;
560 server
.sin_port
=htons(port
);
562 if (strcmp(h
,"*") == 0)
563 server
.sin_addr
.s_addr
=INADDR_ANY
;
566 if (!BIO_get_host_ip(h
,&(ip
[0]))) return(INVALID_SOCKET
);
568 ((unsigned long)ip
[0]<<24L)|
569 ((unsigned long)ip
[1]<<16L)|
570 ((unsigned long)ip
[2]<< 8L)|
571 ((unsigned long)ip
[3]);
572 server
.sin_addr
.s_addr
=htonl(l
);
576 s
=socket(AF_INET
,SOCK_STREAM
,SOCKET_PROTOCOL
);
577 if (s
== INVALID_SOCKET
)
579 SYSerr(SYS_F_SOCKET
,get_last_socket_error());
580 ERR_add_error_data(3,"port='",host
,"'");
581 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET
,BIO_R_UNABLE_TO_CREATE_SOCKET
);
586 if (bind_mode
== BIO_BIND_REUSEADDR
)
590 ret
=setsockopt(s
,SOL_SOCKET
,SO_REUSEADDR
,(char *)&i
,sizeof(i
));
591 bind_mode
=BIO_BIND_NORMAL
;
594 if (bind(s
,(struct sockaddr
*)&server
,sizeof(server
)) == -1)
597 err_num
=get_last_socket_error();
598 if ((bind_mode
== BIO_BIND_REUSEADDR_IF_UNUSED
) &&
599 (err_num
== EADDRINUSE
))
601 memcpy((char *)&client
,(char *)&server
,sizeof(server
));
602 if (strcmp(h
,"*") == 0)
603 client
.sin_addr
.s_addr
=htonl(0x7F000001);
604 cs
=socket(AF_INET
,SOCK_STREAM
,SOCKET_PROTOCOL
);
605 if (cs
!= INVALID_SOCKET
)
608 ii
=connect(cs
,(struct sockaddr
*)&client
,
611 if (ii
== INVALID_SOCKET
)
613 bind_mode
=BIO_BIND_REUSEADDR
;
622 SYSerr(SYS_F_BIND
,err_num
);
623 ERR_add_error_data(3,"port='",host
,"'");
624 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET
,BIO_R_UNABLE_TO_BIND_SOCKET
);
627 if (listen(s
,MAX_LISTEN
) == -1)
629 SYSerr(SYS_F_BIND
,get_last_socket_error());
630 ERR_add_error_data(3,"port='",host
,"'");
631 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET
,BIO_R_UNABLE_TO_LISTEN_SOCKET
);
636 if (str
!= NULL
) OPENSSL_free(str
);
637 if ((ret
== 0) && (s
!= INVALID_SOCKET
))
645 int BIO_accept(int sock
, char **addr
)
647 int ret
=INVALID_SOCKET
;
648 static struct sockaddr_in from
;
654 memset((char *)&from
,0,sizeof(from
));
656 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
657 * of type (int *) whereas under other systems it is (void *) if
658 * you don't have a cast it will choke the compiler: if you do
659 * have a cast then you can either go for (int *) or (void *).
661 ret
=accept(sock
,(struct sockaddr
*)&from
,(void *)&len
);
662 if (ret
== INVALID_SOCKET
)
664 if(BIO_sock_should_retry(ret
)) return -2;
665 SYSerr(SYS_F_ACCEPT
,get_last_socket_error());
666 BIOerr(BIO_F_BIO_ACCEPT
,BIO_R_ACCEPT_ERROR
);
670 if (addr
== NULL
) goto end
;
672 l
=ntohl(from
.sin_addr
.s_addr
);
673 port
=ntohs(from
.sin_port
);
676 if ((p
=OPENSSL_malloc(24)) == NULL
)
678 BIOerr(BIO_F_BIO_ACCEPT
,ERR_R_MALLOC_FAILURE
);
683 sprintf(*addr
,"%d.%d.%d.%d:%d",
684 (unsigned char)(l
>>24L)&0xff,
685 (unsigned char)(l
>>16L)&0xff,
686 (unsigned char)(l
>> 8L)&0xff,
687 (unsigned char)(l
)&0xff,
693 int BIO_set_tcp_ndelay(int s
, int on
)
696 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
707 ret
=setsockopt(s
,opt
,TCP_NODELAY
,(char *)&on
,sizeof(on
));
713 int BIO_socket_nbio(int s
, int mode
)
720 ret
=BIO_socket_ioctl(s
,FIONBIO
,&l
);