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 #include <openssl/dso.h>
77 #define SOCKET_PROTOCOL IPPROTO_TCP
80 #define MAX_LISTEN SO_MAXCONN
81 #elif defined(SOMAXCONN)
82 #define MAX_LISTEN SOMAXCONN
87 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
88 static int wsa_init_done=0;
92 static unsigned long BIO_ghbn_hits=0L;
93 static unsigned long BIO_ghbn_miss=0L;
96 static struct ghbn_cache_st
101 } ghbn_cache[GHBN_NUM];
104 static int get_ip(const char *str,unsigned char *ip);
106 static void ghbn_free(struct hostent *a);
107 static struct hostent *ghbn_dup(struct hostent *a);
109 int BIO_get_host_ip(const char *str, unsigned char *ip)
119 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
123 /* At this point, we have something that is most probably correct
124 in some way, so let's init the socket. */
125 if (BIO_sock_init() != 1)
126 return 0; /* don't generate another error code here */
128 /* If the string actually contained an IP address, we need not do
130 if (i > 0) return(1);
132 /* do a gethostbyname */
133 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
135 he=BIO_gethostbyname(str);
138 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
142 /* cast to short because of win16 winsock definition */
143 if ((short)he->h_addrtype != AF_INET)
145 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
149 ip[i]=he->h_addr_list[0][i];
154 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
157 ERR_add_error_data(2,"host=",str);
164 int BIO_get_port(const char *str, unsigned short *port_ptr)
171 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
176 *port_ptr=(unsigned short)i;
179 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
180 /* Note: under VMS with SOCKETSHR, it seems like the first
181 * parameter is 'char *', instead of 'const char *'
184 s=getservbyname((char *)str,"tcp");
186 s=getservbyname(str,"tcp");
189 *port_ptr=ntohs((unsigned short)s->s_port);
190 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
193 if (strcmp(str,"http") == 0)
195 else if (strcmp(str,"telnet") == 0)
197 else if (strcmp(str,"socks") == 0)
199 else if (strcmp(str,"https") == 0)
201 else if (strcmp(str,"ssl") == 0)
203 else if (strcmp(str,"ftp") == 0)
205 else if (strcmp(str,"gopher") == 0)
208 else if (strcmp(str,"wais") == 0)
213 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
214 ERR_add_error_data(3,"service='",str,"'");
222 int BIO_sock_error(int sock)
227 #if defined(OPENSSL_SYS_BEOS_R5)
232 /* Note: under Windows the third parameter is of type (char *)
233 * whereas under other systems it is (void *) if you don't have
234 * a cast it will choke the compiler: if you do have a cast then
235 * you can either go for (char *) or (void *).
237 i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
245 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
252 case BIO_GHBN_CTRL_HITS:
253 return(BIO_ghbn_hits);
255 case BIO_GHBN_CTRL_MISSES:
256 return(BIO_ghbn_miss);
258 case BIO_GHBN_CTRL_CACHE_SIZE:
261 case BIO_GHBN_CTRL_GET_ENTRY:
262 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
263 (ghbn_cache[iarg].order > 0))
266 if (p == NULL) return(0);
267 *p=ghbn_cache[iarg].name;
268 ghbn_cache[iarg].name[128]='\0';
273 case BIO_GHBN_CTRL_FLUSH:
274 for (i=0; i<GHBN_NUM; i++)
275 ghbn_cache[i].order=0;
285 static struct hostent *ghbn_dup(struct hostent *a)
291 ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
292 if (ret == NULL) return(NULL);
293 memset(ret,0,sizeof(struct hostent));
295 for (i=0; a->h_aliases[i] != NULL; i++)
298 ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
299 if (ret->h_aliases == NULL)
301 memset(ret->h_aliases, 0, i*sizeof(char *));
303 for (i=0; a->h_addr_list[i] != NULL; i++)
306 ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
307 if (ret->h_addr_list == NULL)
309 memset(ret->h_addr_list, 0, i*sizeof(char *));
311 j=strlen(a->h_name)+1;
312 if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
313 memcpy((char *)ret->h_name,a->h_name,j);
314 for (i=0; a->h_aliases[i] != NULL; i++)
316 j=strlen(a->h_aliases[i])+1;
317 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
318 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
320 ret->h_length=a->h_length;
321 ret->h_addrtype=a->h_addrtype;
322 for (i=0; a->h_addr_list[i] != NULL; i++)
324 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
326 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
339 static void ghbn_free(struct hostent *a)
346 if (a->h_aliases != NULL)
348 for (i=0; a->h_aliases[i] != NULL; i++)
349 OPENSSL_free(a->h_aliases[i]);
350 OPENSSL_free(a->h_aliases);
352 if (a->h_addr_list != NULL)
354 for (i=0; a->h_addr_list[i] != NULL; i++)
355 OPENSSL_free(a->h_addr_list[i]);
356 OPENSSL_free(a->h_addr_list);
358 if (a->h_name != NULL) OPENSSL_free(a->h_name);
364 struct hostent *BIO_gethostbyname(const char *name)
367 /* Caching gethostbyname() results forever is wrong,
368 * so we have to let the true gethostbyname() worry about this */
369 #if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__))
370 return gethostbyname((char*)name);
372 return gethostbyname(name);
377 unsigned long low= (unsigned long)-1;
381 /* It doesn't make sense to use locking here: The function interface
382 * is not thread-safe, because threads can never be sure when
383 * some other thread destroys the data they were given a pointer to.
385 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
390 for (i=0; i<GHBN_NUM; i++)
392 if (low > ghbn_cache[i].order)
394 low=ghbn_cache[i].order;
397 if (ghbn_cache[i].order > 0)
399 if (strncmp(name,ghbn_cache[i].name,128) == 0)
407 if (i == GHBN_NUM) /* no hit*/
410 /* Note: under VMS with SOCKETSHR, it seems like the first
411 * parameter is 'char *', instead of 'const char *'
413 # ifndef CONST_STRICT
414 ret=gethostbyname((char *)name);
416 ret=gethostbyname(name);
421 if (j > 128) /* too big to cache */
424 /* If we were trying to make this function thread-safe (which
425 * is bound to fail), we'd have to give up in this case
426 * (or allocate more memory). */
432 /* else add to cache */
433 if (ghbn_cache[lowi].ent != NULL)
434 ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
435 ghbn_cache[lowi].name[0] = '\0';
437 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
439 BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
442 strncpy(ghbn_cache[lowi].name,name,128);
443 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
448 ret= ghbn_cache[i].ent;
449 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
453 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
460 int BIO_sock_init(void)
462 #ifdef OPENSSL_SYS_WINDOWS
463 static struct WSAData wsa_state;
470 memset(&wsa_state,0,sizeof(wsa_state));
471 /* Not making wsa_state available to the rest of the
472 * code is formally wrong. But the structures we use
473 * are [beleived to be] invariable among Winsock DLLs,
474 * while API availability is [expected to be] probed
475 * at run-time with DSO_global_lookup. */
476 if (WSAStartup(0x0202,&wsa_state)!=0)
478 err=WSAGetLastError();
479 SYSerr(SYS_F_WSASTARTUP,err);
480 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
484 #endif /* OPENSSL_SYS_WINDOWS */
486 extern int _watt_do_exit;
487 _watt_do_exit = 0; /* don't make sock_init() call exit() */
492 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
500 wVerReq = MAKEWORD( 2, 0 );
501 err = WSAStartup(wVerReq,&wsaData);
504 SYSerr(SYS_F_WSASTARTUP,err);
505 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
514 void BIO_sock_cleanup(void)
516 #ifdef OPENSSL_SYS_WINDOWS
520 #if 0 /* this call is claimed to be non-present in Winsock2 */
521 WSACancelBlockingCall();
525 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
534 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
536 int BIO_socket_ioctl(int fd, long type, void *arg)
541 i=ioctlsocket(fd,type,(char *)arg);
543 i=ioctlsocket(fd,type,arg);
544 #endif /* __DJGPP__ */
546 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
549 #endif /* __VMS_VER */
551 /* The reason I have implemented this instead of using sscanf is because
552 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
553 static int get_ip(const char *str, unsigned char ip[4])
558 tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
563 if ((c >= '0') && (c <= '9'))
566 tmp[num]=tmp[num]*10+c-'0';
567 if (tmp[num] > 255) return(0);
572 if (num == 3) return(0);
576 else if (c == '\0' && (num == 3) && ok)
588 int BIO_get_accept_socket(char *host, int bind_mode)
593 struct sockaddr_in sa_in;
595 struct sockaddr_in6 sa_in6;
598 int s=INVALID_SOCKET,cs;
606 if (BIO_sock_init() != 1) return(INVALID_SOCKET);
608 if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
624 if (p) *p++='\0'; /* points at last ':', '::port' is special [see below] */
629 static union { void *p;
630 int (*f)(const char *,const char *,
631 const struct addrinfo *,
633 } p_getaddrinfo = {NULL};
634 static union { void *p;
635 void (*f)(struct addrinfo *);
636 } p_freeaddrinfo = {NULL};
637 struct addrinfo *res,hint;
639 if (p_getaddrinfo.p==NULL)
641 if ((p_getaddrinfo.p=DSO_global_lookup("getaddrinfo"))==NULL ||
642 (p_freeaddrinfo.p=DSO_global_lookup("freeaddrinfo"))==NULL)
643 p_getaddrinfo.p=(void*)-1;
645 if (p_getaddrinfo.p==(void *)-1) break;
647 /* '::port' enforces IPv6 wildcard listener. Some OSes,
648 * e.g. Solaris, default to IPv6 without any hint. Also
649 * note that commonly IPv6 wildchard socket can service
650 * IPv4 connections just as well... */
651 memset(&hint,0,sizeof(hint));
656 if (h[1]=='\0') h=NULL;
658 hint.ai_family = AF_INET6;
663 else if (h[0]=='*' && h[1]=='\0')
667 if ((*p_getaddrinfo.f)(h,p,&hint,&res)) break;
669 memcpy(&server, res->ai_addr,
670 res->ai_addrlen<=sizeof(server)?res->ai_addrlen:sizeof(server));
672 (*p_freeaddrinfo.f)(res);
677 if (!BIO_get_port(p,&port)) goto err;
679 memset((char *)&server,0,sizeof(server));
680 server.sa_in.sin_family=AF_INET;
681 server.sa_in.sin_port=htons(port);
683 if (h == NULL || strcmp(h,"*") == 0)
684 server.sa_in.sin_addr.s_addr=INADDR_ANY;
687 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
689 ((unsigned long)ip[0]<<24L)|
690 ((unsigned long)ip[1]<<16L)|
691 ((unsigned long)ip[2]<< 8L)|
692 ((unsigned long)ip[3]);
693 server.sa_in.sin_addr.s_addr=htonl(l);
697 s=socket(server.sa.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
698 if (s == INVALID_SOCKET)
700 SYSerr(SYS_F_SOCKET,get_last_socket_error());
701 ERR_add_error_data(3,"port='",host,"'");
702 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
707 if (bind_mode == BIO_BIND_REUSEADDR)
711 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
712 bind_mode=BIO_BIND_NORMAL;
715 if (bind(s,&server.sa,sizeof(server)) == -1)
718 err_num=get_last_socket_error();
719 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
720 (err_num == EADDRINUSE))
723 if (h == NULL || strcmp(h,"*") == 0)
726 if (client.sa.sa_family == AF_INET6)
728 memset(&client.sa_in6.sin6_addr,0,sizeof(client.sa_in6.sin6_addr));
729 client.sa_in6.sin6_addr.s6_addr[15]=1;
733 if (client.sa.sa_family == AF_INET)
735 client.sa_in.sin_addr.s_addr=htonl(0x7F000001);
739 cs=socket(client.sa.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
740 if (cs != INVALID_SOCKET)
743 ii=connect(cs,&client.sa,sizeof(client));
745 if (ii == INVALID_SOCKET)
747 bind_mode=BIO_BIND_REUSEADDR;
756 SYSerr(SYS_F_BIND,err_num);
757 ERR_add_error_data(3,"port='",host,"'");
758 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
761 if (listen(s,MAX_LISTEN) == -1)
763 SYSerr(SYS_F_BIND,get_last_socket_error());
764 ERR_add_error_data(3,"port='",host,"'");
765 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
770 if (str != NULL) OPENSSL_free(str);
771 if ((ret == 0) && (s != INVALID_SOCKET))
779 int BIO_accept(int sock, char **addr)
781 int ret=INVALID_SOCKET;
788 * As for following union. Trouble is that there are platforms
789 * that have socklen_t and there are platforms that don't, on
790 * some platforms socklen_t is int and on some size_t. So what
791 * one can do? One can cook #ifdef spaghetti, which is nothing
792 * but masochistic. Or one can do union between int and size_t.
793 * One naturally does it primarily for 64-bit platforms where
794 * sizeof(int) != sizeof(size_t). But would it work? Note that
795 * if size_t member is initialized to 0, then later int member
796 * assignment naturally does the job on little-endian platforms
797 * regardless accept's expectations! What about big-endians?
798 * If accept expects int*, then it works, and if size_t*, then
799 * length value would appear as unreasonably large. But this
800 * won't prevent it from filling in the address structure. The
801 * trouble of course would be if accept returns more data than
802 * actual buffer can accomodate and overwrite stack... That's
803 * where early OPENSSL_assert comes into picture. Besides, the
804 * only 64-bit big-endian platform found so far that expects
805 * size_t* is HP-UX, where stack grows towards higher address.
808 union { size_t s; int i; } len;
811 struct sockaddr_in sa_in;
813 struct sockaddr_in6 sa_in6;
819 sa.len.i=sizeof(sa.from);
820 memset(&sa.from,0,sizeof(sa.from));
821 ret=accept(sock,&sa.from.sa,(void *)&sa.len);
822 if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0)
824 OPENSSL_assert(sa.len.s<=sizeof(sa.from));
825 sa.len.i = (int)sa.len.s;
826 /* use sa.len.i from this point */
828 if (ret == INVALID_SOCKET)
830 if(BIO_sock_should_retry(ret)) return -2;
831 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
832 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
836 if (addr == NULL) goto end;
840 char h[NI_MAXHOST],s[NI_MAXSERV];
842 static union { void *p;
843 int (*f)(const struct sockaddr *,size_t/*socklen_t*/,
844 char *,size_t,char *,size_t,int);
845 } p_getnameinfo = {NULL};
846 /* 2nd argument to getnameinfo is specified to
847 * be socklen_t. Unfortunately there is a number
848 * of environments where socklen_t is not defined.
849 * As it's passed by value, it's safe to pass it
850 * as size_t... <appro> */
852 if (p_getnameinfo.p==NULL)
854 if ((p_getnameinfo.p=DSO_global_lookup("getnameinfo"))==NULL)
855 p_getnameinfo.p=(void*)-1;
857 if (p_getnameinfo.p==(void *)-1) break;
859 if ((*p_getnameinfo.f)(&sa.from.sa,sa.len.i,h,sizeof(h),s,sizeof(s),
860 NI_NUMERICHOST|NI_NUMERICSERV)) break;
861 nl = strlen(h)+strlen(s)+2;
863 if (p) { *p = '\0'; p = OPENSSL_realloc(p,nl); }
864 else { p = OPENSSL_malloc(nl); }
867 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
871 BIO_snprintf(*addr,nl,"%s:%s",h,s);
875 if (sa.from.sa.sa_family != AF_INET) goto end;
876 l=ntohl(sa.from.sa_in.sin_addr.s_addr);
877 port=ntohs(sa.from.sa_in.sin_port);
880 if ((p=OPENSSL_malloc(24)) == NULL)
882 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
887 BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d",
888 (unsigned char)(l>>24L)&0xff,
889 (unsigned char)(l>>16L)&0xff,
890 (unsigned char)(l>> 8L)&0xff,
891 (unsigned char)(l )&0xff,
897 int BIO_set_tcp_ndelay(int s, int on)
900 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
911 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
917 int BIO_socket_nbio(int s, int mode)
924 ret=BIO_socket_ioctl(s,FIONBIO,&l);