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.]
64 #include <openssl/bio.h>
66 #ifndef OPENSSL_NO_SOCK
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 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE)
83 static int wsa_init_done=0;
87 static unsigned long BIO_ghbn_hits=0L;
88 static unsigned long BIO_ghbn_miss=0L;
91 static struct ghbn_cache_st
96 } ghbn_cache[GHBN_NUM];
99 static int get_ip(const char *str,unsigned char *ip);
101 static void ghbn_free(struct hostent *a);
102 static struct hostent *ghbn_dup(struct hostent *a);
104 int BIO_get_host_ip(const char *str, unsigned char *ip)
114 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
118 /* At this point, we have something that is most probably correct
119 in some way, so let's init the socket. */
120 if (BIO_sock_init() != 1)
121 return 0; /* don't generate another error code here */
123 /* If the string actually contained an IP address, we need not do
125 if (i > 0) return(1);
127 /* do a gethostbyname */
128 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
130 he=BIO_gethostbyname(str);
133 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
137 /* cast to short because of win16 winsock definition */
138 if ((short)he->h_addrtype != AF_INET)
140 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
144 ip[i]=he->h_addr_list[0][i];
149 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
152 ERR_add_error_data(2,"host=",str);
159 int BIO_get_port(const char *str, unsigned short *port_ptr)
166 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
171 *port_ptr=(unsigned short)i;
174 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
175 /* Note: under VMS with SOCKETSHR, it seems like the first
176 * parameter is 'char *', instead of 'const char *'
184 *port_ptr=ntohs((unsigned short)s->s_port);
185 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
188 if (strcmp(str,"http") == 0)
190 else if (strcmp(str,"telnet") == 0)
192 else if (strcmp(str,"socks") == 0)
194 else if (strcmp(str,"https") == 0)
196 else if (strcmp(str,"ssl") == 0)
198 else if (strcmp(str,"ftp") == 0)
200 else if (strcmp(str,"gopher") == 0)
203 else if (strcmp(str,"wais") == 0)
208 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
209 ERR_add_error_data(3,"service='",str,"'");
217 int BIO_sock_error(int sock)
223 /* Note: under Windows the third parameter is of type (char *)
224 * whereas under other systems it is (void *) if you don't have
225 * a cast it will choke the compiler: if you do have a cast then
226 * you can either go for (char *) or (void *).
228 i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
236 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
243 case BIO_GHBN_CTRL_HITS:
244 return(BIO_ghbn_hits);
246 case BIO_GHBN_CTRL_MISSES:
247 return(BIO_ghbn_miss);
249 case BIO_GHBN_CTRL_CACHE_SIZE:
252 case BIO_GHBN_CTRL_GET_ENTRY:
253 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
254 (ghbn_cache[iarg].order > 0))
257 if (p == NULL) return(0);
258 *p=ghbn_cache[iarg].name;
259 ghbn_cache[iarg].name[128]='\0';
264 case BIO_GHBN_CTRL_FLUSH:
265 for (i=0; i<GHBN_NUM; i++)
266 ghbn_cache[i].order=0;
276 static struct hostent *ghbn_dup(struct hostent *a)
282 ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
283 if (ret == NULL) return(NULL);
284 memset(ret,0,sizeof(struct hostent));
286 for (i=0; a->h_aliases[i] != NULL; i++)
289 ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
290 if (ret->h_aliases == NULL)
292 memset(ret->h_aliases, 0, i*sizeof(char *));
294 for (i=0; a->h_addr_list[i] != NULL; i++)
297 ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
298 if (ret->h_addr_list == NULL)
300 memset(ret->h_addr_list, 0, i*sizeof(char *));
302 j=strlen(a->h_name)+1;
303 if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
304 memcpy((char *)ret->h_name,a->h_name,j);
305 for (i=0; a->h_aliases[i] != NULL; i++)
307 j=strlen(a->h_aliases[i])+1;
308 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
309 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
311 ret->h_length=a->h_length;
312 ret->h_addrtype=a->h_addrtype;
313 for (i=0; a->h_addr_list[i] != NULL; i++)
315 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
317 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
330 static void ghbn_free(struct hostent *a)
337 if (a->h_aliases != NULL)
339 for (i=0; a->h_aliases[i] != NULL; i++)
340 OPENSSL_free(a->h_aliases[i]);
341 OPENSSL_free(a->h_aliases);
343 if (a->h_addr_list != NULL)
345 for (i=0; a->h_addr_list[i] != NULL; i++)
346 OPENSSL_free(a->h_addr_list[i]);
347 OPENSSL_free(a->h_addr_list);
349 if (a->h_name != NULL) OPENSSL_free(a->h_name);
355 struct hostent *BIO_gethostbyname(const char *name)
358 /* Caching gethostbyname() results forever is wrong,
359 * so we have to let the true gethostbyname() worry about this */
360 return gethostbyname(name);
364 unsigned long low= (unsigned long)-1;
368 /* It doesn't make sense to use locking here: The function interface
369 * is not thread-safe, because threads can never be sure when
370 * some other thread destroys the data they were given a pointer to.
372 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
377 for (i=0; i<GHBN_NUM; i++)
379 if (low > ghbn_cache[i].order)
381 low=ghbn_cache[i].order;
384 if (ghbn_cache[i].order > 0)
386 if (strncmp(name,ghbn_cache[i].name,128) == 0)
394 if (i == GHBN_NUM) /* no hit*/
397 /* Note: under VMS with SOCKETSHR, it seems like the first
398 * parameter is 'char *', instead of 'const char *'
401 # ifndef CONST_STRICT
408 if (j > 128) /* too big to cache */
411 /* If we were trying to make this function thread-safe (which
412 * is bound to fail), we'd have to give up in this case
413 * (or allocate more memory). */
419 /* else add to cache */
420 if (ghbn_cache[lowi].ent != NULL)
421 ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
422 ghbn_cache[lowi].name[0] = '\0';
424 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
426 BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
429 strncpy(ghbn_cache[lowi].name,name,128);
430 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
435 ret= ghbn_cache[i].ent;
436 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
440 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
447 int BIO_sock_init(void)
449 #ifdef OPENSSL_SYS_WINDOWS
450 static struct WSAData wsa_state;
457 signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
460 memset(&wsa_state,0,sizeof(wsa_state));
461 if (WSAStartup(0x0101,&wsa_state)!=0)
463 err=WSAGetLastError();
464 SYSerr(SYS_F_WSASTARTUP,err);
465 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
469 #endif /* OPENSSL_SYS_WINDOWS */
471 extern int _watt_do_exit;
472 _watt_do_exit = 0; /* don't make sock_init() call exit() */
477 #if defined(OPENSSL_SYS_NETWARE)
486 signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
490 wVerReq = MAKEWORD( 2, 0 );
491 err = WSAStartup(wVerReq,&wsaData);
494 SYSerr(SYS_F_WSASTARTUP,err);
495 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
504 void BIO_sock_cleanup(void)
506 #ifdef OPENSSL_SYS_WINDOWS
510 #ifndef OPENSSL_SYS_WINCE
511 WSACancelBlockingCall();
515 #elif defined(OPENSSL_SYS_NETWARE)
524 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
526 int BIO_socket_ioctl(int fd, long type, void *arg)
531 i=ioctlsocket(fd,type,(char *)arg);
533 i=ioctlsocket(fd,type,arg);
534 #endif /* __DJGPP__ */
536 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
539 #endif /* __VMS_VER */
541 /* The reason I have implemented this instead of using sscanf is because
542 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
543 static int get_ip(const char *str, unsigned char ip[4])
548 tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
553 if ((c >= '0') && (c <= '9'))
556 tmp[num]=tmp[num]*10+c-'0';
557 if (tmp[num] > 255) return(0);
562 if (num == 3) return(0);
566 else if (c == '\0' && (num == 3) && ok)
578 int BIO_get_accept_socket(char *host, int bind_mode)
581 struct sockaddr_in server,client;
582 int s=INVALID_SOCKET,cs;
590 if (BIO_sock_init() != 1) return(INVALID_SOCKET);
592 if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
616 if (!BIO_get_port(p,&port)) goto err;
618 memset((char *)&server,0,sizeof(server));
619 server.sin_family=AF_INET;
620 server.sin_port=htons(port);
622 if (strcmp(h,"*") == 0)
623 server.sin_addr.s_addr=INADDR_ANY;
626 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
628 ((unsigned long)ip[0]<<24L)|
629 ((unsigned long)ip[1]<<16L)|
630 ((unsigned long)ip[2]<< 8L)|
631 ((unsigned long)ip[3]);
632 server.sin_addr.s_addr=htonl(l);
636 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
637 if (s == INVALID_SOCKET)
639 SYSerr(SYS_F_SOCKET,get_last_socket_error());
640 ERR_add_error_data(3,"port='",host,"'");
641 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
646 if (bind_mode == BIO_BIND_REUSEADDR)
650 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
651 bind_mode=BIO_BIND_NORMAL;
654 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
657 err_num=get_last_socket_error();
658 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
659 (err_num == EADDRINUSE))
661 memcpy((char *)&client,(char *)&server,sizeof(server));
662 if (strcmp(h,"*") == 0)
663 client.sin_addr.s_addr=htonl(0x7F000001);
664 cs=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
665 if (cs != INVALID_SOCKET)
668 ii=connect(cs,(struct sockaddr *)&client,
671 if (ii == INVALID_SOCKET)
673 bind_mode=BIO_BIND_REUSEADDR;
682 SYSerr(SYS_F_BIND,err_num);
683 ERR_add_error_data(3,"port='",host,"'");
684 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
687 if (listen(s,MAX_LISTEN) == -1)
689 SYSerr(SYS_F_BIND,get_last_socket_error());
690 ERR_add_error_data(3,"port='",host,"'");
691 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
696 if (str != NULL) OPENSSL_free(str);
697 if ((ret == 0) && (s != INVALID_SOCKET))
705 int BIO_accept(int sock, char **addr)
707 int ret=INVALID_SOCKET;
708 static struct sockaddr_in from;
714 memset((char *)&from,0,sizeof(from));
716 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
717 * of type (int *) whereas under other systems it is (void *) if
718 * you don't have a cast it will choke the compiler: if you do
719 * have a cast then you can either go for (int *) or (void *).
721 ret=accept(sock,(struct sockaddr *)&from,(void *)&len);
722 if (ret == INVALID_SOCKET)
724 if(BIO_sock_should_retry(ret)) return -2;
725 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
726 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
730 if (addr == NULL) goto end;
732 l=ntohl(from.sin_addr.s_addr);
733 port=ntohs(from.sin_port);
736 if ((p=OPENSSL_malloc(24)) == NULL)
738 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
743 BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d",
744 (unsigned char)(l>>24L)&0xff,
745 (unsigned char)(l>>16L)&0xff,
746 (unsigned char)(l>> 8L)&0xff,
747 (unsigned char)(l )&0xff,
753 int BIO_set_tcp_ndelay(int s, int on)
756 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
767 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
773 int BIO_socket_nbio(int s, int mode)
780 ret=BIO_socket_ioctl(s,FIONBIO,&l);