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>
65 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
67 #if defined(NETWARE_CLIB)
68 #include <sys/ioctl.h>
73 #ifndef OPENSSL_NO_SOCK
75 #ifdef OPENSSL_SYS_WIN16
76 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
78 #define SOCKET_PROTOCOL IPPROTO_TCP
82 #define MAX_LISTEN SO_MAXCONN
83 #elif defined(SOMAXCONN)
84 #define MAX_LISTEN SOMAXCONN
89 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
90 static int wsa_init_done=0;
94 static unsigned long BIO_ghbn_hits=0L;
95 static unsigned long BIO_ghbn_miss=0L;
98 static struct ghbn_cache_st
103 } ghbn_cache[GHBN_NUM];
106 static int get_ip(const char *str,unsigned char *ip);
108 static void ghbn_free(struct hostent *a);
109 static struct hostent *ghbn_dup(struct hostent *a);
111 int BIO_get_host_ip(const char *str, unsigned char *ip)
121 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
125 /* At this point, we have something that is most probably correct
126 in some way, so let's init the socket. */
127 if (BIO_sock_init() != 1)
128 return 0; /* don't generate another error code here */
130 /* If the string actually contained an IP address, we need not do
132 if (i > 0) return(1);
134 /* do a gethostbyname */
135 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
137 he=BIO_gethostbyname(str);
140 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
144 /* cast to short because of win16 winsock definition */
145 if ((short)he->h_addrtype != AF_INET)
147 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
151 ip[i]=he->h_addr_list[0][i];
156 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
159 ERR_add_error_data(2,"host=",str);
166 int BIO_get_port(const char *str, unsigned short *port_ptr)
173 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
178 *port_ptr=(unsigned short)i;
181 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
182 /* Note: under VMS with SOCKETSHR, it seems like the first
183 * parameter is 'char *', instead of 'const char *'
186 s=getservbyname((char *)str,"tcp");
188 s=getservbyname(str,"tcp");
191 *port_ptr=ntohs((unsigned short)s->s_port);
192 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
195 if (strcmp(str,"http") == 0)
197 else if (strcmp(str,"telnet") == 0)
199 else if (strcmp(str,"socks") == 0)
201 else if (strcmp(str,"https") == 0)
203 else if (strcmp(str,"ssl") == 0)
205 else if (strcmp(str,"ftp") == 0)
207 else if (strcmp(str,"gopher") == 0)
210 else if (strcmp(str,"wais") == 0)
215 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
216 ERR_add_error_data(3,"service='",str,"'");
224 int BIO_sock_error(int sock)
230 /* Note: under Windows the third parameter is of type (char *)
231 * whereas under other systems it is (void *) if you don't have
232 * a cast it will choke the compiler: if you do have a cast then
233 * you can either go for (char *) or (void *).
235 i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
243 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
250 case BIO_GHBN_CTRL_HITS:
251 return(BIO_ghbn_hits);
253 case BIO_GHBN_CTRL_MISSES:
254 return(BIO_ghbn_miss);
256 case BIO_GHBN_CTRL_CACHE_SIZE:
259 case BIO_GHBN_CTRL_GET_ENTRY:
260 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
261 (ghbn_cache[iarg].order > 0))
264 if (p == NULL) return(0);
265 *p=ghbn_cache[iarg].name;
266 ghbn_cache[iarg].name[128]='\0';
271 case BIO_GHBN_CTRL_FLUSH:
272 for (i=0; i<GHBN_NUM; i++)
273 ghbn_cache[i].order=0;
283 static struct hostent *ghbn_dup(struct hostent *a)
289 ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
290 if (ret == NULL) return(NULL);
291 memset(ret,0,sizeof(struct hostent));
293 for (i=0; a->h_aliases[i] != NULL; i++)
296 ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
297 if (ret->h_aliases == NULL)
299 memset(ret->h_aliases, 0, i*sizeof(char *));
301 for (i=0; a->h_addr_list[i] != NULL; i++)
304 ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
305 if (ret->h_addr_list == NULL)
307 memset(ret->h_addr_list, 0, i*sizeof(char *));
309 j=strlen(a->h_name)+1;
310 if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
311 memcpy((char *)ret->h_name,a->h_name,j);
312 for (i=0; a->h_aliases[i] != NULL; i++)
314 j=strlen(a->h_aliases[i])+1;
315 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
316 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
318 ret->h_length=a->h_length;
319 ret->h_addrtype=a->h_addrtype;
320 for (i=0; a->h_addr_list[i] != NULL; i++)
322 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
324 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
337 static void ghbn_free(struct hostent *a)
344 if (a->h_aliases != NULL)
346 for (i=0; a->h_aliases[i] != NULL; i++)
347 OPENSSL_free(a->h_aliases[i]);
348 OPENSSL_free(a->h_aliases);
350 if (a->h_addr_list != NULL)
352 for (i=0; a->h_addr_list[i] != NULL; i++)
353 OPENSSL_free(a->h_addr_list[i]);
354 OPENSSL_free(a->h_addr_list);
356 if (a->h_name != NULL) OPENSSL_free(a->h_name);
362 struct hostent *BIO_gethostbyname(const char *name)
365 /* Caching gethostbyname() results forever is wrong,
366 * so we have to let the true gethostbyname() worry about this */
367 #if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__))
368 return gethostbyname((char*)name);
370 return gethostbyname(name);
375 unsigned long low= (unsigned long)-1;
379 /* It doesn't make sense to use locking here: The function interface
380 * is not thread-safe, because threads can never be sure when
381 * some other thread destroys the data they were given a pointer to.
383 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
388 for (i=0; i<GHBN_NUM; i++)
390 if (low > ghbn_cache[i].order)
392 low=ghbn_cache[i].order;
395 if (ghbn_cache[i].order > 0)
397 if (strncmp(name,ghbn_cache[i].name,128) == 0)
405 if (i == GHBN_NUM) /* no hit*/
408 /* Note: under VMS with SOCKETSHR, it seems like the first
409 * parameter is 'char *', instead of 'const char *'
411 # ifndef CONST_STRICT
412 ret=gethostbyname((char *)name);
414 ret=gethostbyname(name);
419 if (j > 128) /* too big to cache */
422 /* If we were trying to make this function thread-safe (which
423 * is bound to fail), we'd have to give up in this case
424 * (or allocate more memory). */
430 /* else add to cache */
431 if (ghbn_cache[lowi].ent != NULL)
432 ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
433 ghbn_cache[lowi].name[0] = '\0';
435 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
437 BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
440 strncpy(ghbn_cache[lowi].name,name,128);
441 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
446 ret= ghbn_cache[i].ent;
447 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
451 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
458 int BIO_sock_init(void)
460 #ifdef OPENSSL_SYS_WINDOWS
461 static struct WSAData wsa_state;
468 memset(&wsa_state,0,sizeof(wsa_state));
469 if (WSAStartup(0x0101,&wsa_state)!=0)
471 err=WSAGetLastError();
472 SYSerr(SYS_F_WSASTARTUP,err);
473 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
477 #endif /* OPENSSL_SYS_WINDOWS */
479 extern int _watt_do_exit;
480 _watt_do_exit = 0; /* don't make sock_init() call exit() */
485 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
493 wVerReq = MAKEWORD( 2, 0 );
494 err = WSAStartup(wVerReq,&wsaData);
497 SYSerr(SYS_F_WSASTARTUP,err);
498 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
507 void BIO_sock_cleanup(void)
509 #ifdef OPENSSL_SYS_WINDOWS
513 #ifndef OPENSSL_SYS_WINCE
514 WSACancelBlockingCall(); /* Winsock 1.1 specific */
518 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
527 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
529 int BIO_socket_ioctl(int fd, long type, void *arg)
534 i=ioctlsocket(fd,type,(char *)arg);
536 i=ioctlsocket(fd,type,arg);
537 #endif /* __DJGPP__ */
539 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
542 #endif /* __VMS_VER */
544 /* The reason I have implemented this instead of using sscanf is because
545 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
546 static int get_ip(const char *str, unsigned char ip[4])
551 tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
556 if ((c >= '0') && (c <= '9'))
559 tmp[num]=tmp[num]*10+c-'0';
560 if (tmp[num] > 255) return(0);
565 if (num == 3) return(0);
569 else if (c == '\0' && (num == 3) && ok)
581 int BIO_get_accept_socket(char *host, int bind_mode)
584 struct sockaddr_in server,client;
585 int s=INVALID_SOCKET,cs;
593 if (BIO_sock_init() != 1) return(INVALID_SOCKET);
595 if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
619 if (!BIO_get_port(p,&port)) goto err;
621 memset((char *)&server,0,sizeof(server));
622 server.sin_family=AF_INET;
623 server.sin_port=htons(port);
625 if (strcmp(h,"*") == 0)
626 server.sin_addr.s_addr=INADDR_ANY;
629 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
631 ((unsigned long)ip[0]<<24L)|
632 ((unsigned long)ip[1]<<16L)|
633 ((unsigned long)ip[2]<< 8L)|
634 ((unsigned long)ip[3]);
635 server.sin_addr.s_addr=htonl(l);
639 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
640 if (s == INVALID_SOCKET)
642 SYSerr(SYS_F_SOCKET,get_last_socket_error());
643 ERR_add_error_data(3,"port='",host,"'");
644 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
649 if (bind_mode == BIO_BIND_REUSEADDR)
653 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
654 bind_mode=BIO_BIND_NORMAL;
657 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
660 err_num=get_last_socket_error();
661 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
662 (err_num == EADDRINUSE))
664 memcpy((char *)&client,(char *)&server,sizeof(server));
665 if (strcmp(h,"*") == 0)
666 client.sin_addr.s_addr=htonl(0x7F000001);
667 cs=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
668 if (cs != INVALID_SOCKET)
671 ii=connect(cs,(struct sockaddr *)&client,
674 if (ii == INVALID_SOCKET)
676 bind_mode=BIO_BIND_REUSEADDR;
685 SYSerr(SYS_F_BIND,err_num);
686 ERR_add_error_data(3,"port='",host,"'");
687 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
690 if (listen(s,MAX_LISTEN) == -1)
692 SYSerr(SYS_F_BIND,get_last_socket_error());
693 ERR_add_error_data(3,"port='",host,"'");
694 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
699 if (str != NULL) OPENSSL_free(str);
700 if ((ret == 0) && (s != INVALID_SOCKET))
708 int BIO_accept(int sock, char **addr)
710 int ret=INVALID_SOCKET;
711 static struct sockaddr_in from;
717 memset((char *)&from,0,sizeof(from));
719 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
720 * of type (int *) whereas under other systems it is (void *) if
721 * you don't have a cast it will choke the compiler: if you do
722 * have a cast then you can either go for (int *) or (void *).
724 ret=accept(sock,(struct sockaddr *)&from,(void *)&len);
725 if (ret == INVALID_SOCKET)
727 if(BIO_sock_should_retry(ret)) return -2;
728 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
729 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
733 if (addr == NULL) goto end;
735 l=ntohl(from.sin_addr.s_addr);
736 port=ntohs(from.sin_port);
739 if ((p=OPENSSL_malloc(24)) == NULL)
741 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
746 BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d",
747 (unsigned char)(l>>24L)&0xff,
748 (unsigned char)(l>>16L)&0xff,
749 (unsigned char)(l>> 8L)&0xff,
750 (unsigned char)(l )&0xff,
756 int BIO_set_tcp_ndelay(int s, int on)
759 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
770 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
776 int BIO_socket_nbio(int s, int mode)
783 ret=BIO_socket_ioctl(s,FIONBIO,&l);