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)
69 #ifndef OPENSSL_NO_SOCK
71 #include <openssl/dso.h>
73 #define SOCKET_PROTOCOL IPPROTO_TCP
76 #define MAX_LISTEN SO_MAXCONN
77 #elif defined(SOMAXCONN)
78 #define MAX_LISTEN SOMAXCONN
83 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
84 static int wsa_init_done=0;
87 #if defined(OPENSSL_SYS_BEOS_BONE)
88 /* BONE's IP6 support is incomplete */
93 static unsigned long BIO_ghbn_hits=0L;
94 static unsigned long BIO_ghbn_miss=0L;
97 static struct ghbn_cache_st
102 } ghbn_cache[GHBN_NUM];
105 static int get_ip(const char *str,unsigned char *ip);
107 static void ghbn_free(struct hostent *a);
108 static struct hostent *ghbn_dup(struct hostent *a);
110 int BIO_get_host_ip(const char *str, unsigned char *ip)
120 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
124 /* At this point, we have something that is most probably correct
125 in some way, so let's init the socket. */
126 if (BIO_sock_init() != 1)
127 return 0; /* don't generate another error code here */
129 /* If the string actually contained an IP address, we need not do
131 if (i > 0) return(1);
133 /* do a gethostbyname */
134 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
136 he=BIO_gethostbyname(str);
139 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
143 /* cast to short because of win16 winsock definition */
144 if ((short)he->h_addrtype != AF_INET)
146 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
150 ip[i]=he->h_addr_list[0][i];
155 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
158 ERR_add_error_data(2,"host=",str);
165 int BIO_get_port(const char *str, unsigned short *port_ptr)
172 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
177 *port_ptr=(unsigned short)i;
180 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
181 /* Note: under VMS with SOCKETSHR, it seems like the first
182 * parameter is 'char *', instead of 'const char *'
190 *port_ptr=ntohs((unsigned short)s->s_port);
191 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
194 if (strcmp(str,"http") == 0)
196 else if (strcmp(str,"telnet") == 0)
198 else if (strcmp(str,"socks") == 0)
200 else if (strcmp(str,"https") == 0)
202 else if (strcmp(str,"ssl") == 0)
204 else if (strcmp(str,"ftp") == 0)
206 else if (strcmp(str,"gopher") == 0)
209 else if (strcmp(str,"wais") == 0)
214 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
215 ERR_add_error_data(3,"service='",str,"'");
223 int BIO_sock_error(int sock)
228 #if defined(OPENSSL_SYS_BEOS_R5)
233 /* Note: under Windows the third parameter is of type (char *)
234 * whereas under other systems it is (void *) if you don't have
235 * a cast it will choke the compiler: if you do have a cast then
236 * you can either go for (char *) or (void *).
238 i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
246 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
253 case BIO_GHBN_CTRL_HITS:
254 return(BIO_ghbn_hits);
256 case BIO_GHBN_CTRL_MISSES:
257 return(BIO_ghbn_miss);
259 case BIO_GHBN_CTRL_CACHE_SIZE:
262 case BIO_GHBN_CTRL_GET_ENTRY:
263 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
264 (ghbn_cache[iarg].order > 0))
267 if (p == NULL) return(0);
268 *p=ghbn_cache[iarg].name;
269 ghbn_cache[iarg].name[128]='\0';
274 case BIO_GHBN_CTRL_FLUSH:
275 for (i=0; i<GHBN_NUM; i++)
276 ghbn_cache[i].order=0;
286 static struct hostent *ghbn_dup(struct hostent *a)
292 ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
293 if (ret == NULL) return(NULL);
294 memset(ret,0,sizeof(struct hostent));
296 for (i=0; a->h_aliases[i] != NULL; i++)
299 ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
300 if (ret->h_aliases == NULL)
302 memset(ret->h_aliases, 0, i*sizeof(char *));
304 for (i=0; a->h_addr_list[i] != NULL; i++)
307 ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
308 if (ret->h_addr_list == NULL)
310 memset(ret->h_addr_list, 0, i*sizeof(char *));
312 j=strlen(a->h_name)+1;
313 if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
314 memcpy((char *)ret->h_name,a->h_name,j);
315 for (i=0; a->h_aliases[i] != NULL; i++)
317 j=strlen(a->h_aliases[i])+1;
318 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
319 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
321 ret->h_length=a->h_length;
322 ret->h_addrtype=a->h_addrtype;
323 for (i=0; a->h_addr_list[i] != NULL; i++)
325 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
327 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
340 static void ghbn_free(struct hostent *a)
347 if (a->h_aliases != NULL)
349 for (i=0; a->h_aliases[i] != NULL; i++)
350 OPENSSL_free(a->h_aliases[i]);
351 OPENSSL_free(a->h_aliases);
353 if (a->h_addr_list != NULL)
355 for (i=0; a->h_addr_list[i] != NULL; i++)
356 OPENSSL_free(a->h_addr_list[i]);
357 OPENSSL_free(a->h_addr_list);
359 if (a->h_name != NULL) OPENSSL_free(a->h_name);
365 struct hostent *BIO_gethostbyname(const char *name)
368 /* Caching gethostbyname() results forever is wrong,
369 * so we have to let the true gethostbyname() worry about this */
370 return gethostbyname(name);
374 unsigned long low= (unsigned long)-1;
378 /* It doesn't make sense to use locking here: The function interface
379 * is not thread-safe, because threads can never be sure when
380 * some other thread destroys the data they were given a pointer to.
382 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
387 for (i=0; i<GHBN_NUM; i++)
389 if (low > ghbn_cache[i].order)
391 low=ghbn_cache[i].order;
394 if (ghbn_cache[i].order > 0)
396 if (strncmp(name,ghbn_cache[i].name,128) == 0)
404 if (i == GHBN_NUM) /* no hit*/
407 /* Note: under VMS with SOCKETSHR, it seems like the first
408 * parameter is 'char *', instead of 'const char *'
411 # ifndef CONST_STRICT
418 if (j > 128) /* too big to cache */
421 /* If we were trying to make this function thread-safe (which
422 * is bound to fail), we'd have to give up in this case
423 * (or allocate more memory). */
429 /* else add to cache */
430 if (ghbn_cache[lowi].ent != NULL)
431 ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
432 ghbn_cache[lowi].name[0] = '\0';
434 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
436 BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
439 strncpy(ghbn_cache[lowi].name,name,128);
440 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
445 ret= ghbn_cache[i].ent;
446 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
450 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
457 int BIO_sock_init(void)
459 #ifdef OPENSSL_SYS_WINDOWS
460 static struct WSAData wsa_state;
467 memset(&wsa_state,0,sizeof(wsa_state));
468 /* Not making wsa_state available to the rest of the
469 * code is formally wrong. But the structures we use
470 * are [beleived to be] invariable among Winsock DLLs,
471 * while API availability is [expected to be] probed
472 * at run-time with DSO_global_lookup. */
473 if (WSAStartup(0x0202,&wsa_state)!=0)
475 err=WSAGetLastError();
476 SYSerr(SYS_F_WSASTARTUP,err);
477 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
481 #endif /* OPENSSL_SYS_WINDOWS */
483 extern int _watt_do_exit;
484 _watt_do_exit = 0; /* don't make sock_init() call exit() */
489 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
497 wVerReq = MAKEWORD( 2, 0 );
498 err = WSAStartup(wVerReq,&wsaData);
501 SYSerr(SYS_F_WSASTARTUP,err);
502 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
511 void BIO_sock_cleanup(void)
513 #ifdef OPENSSL_SYS_WINDOWS
517 #if 0 /* this call is claimed to be non-present in Winsock2 */
518 WSACancelBlockingCall();
522 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
531 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
533 int BIO_socket_ioctl(int fd, long type, void *arg)
538 i=ioctlsocket(fd,type,(char *)arg);
540 i=ioctlsocket(fd,type,arg);
541 #endif /* __DJGPP__ */
543 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
546 #endif /* __VMS_VER */
548 /* The reason I have implemented this instead of using sscanf is because
549 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
550 static int get_ip(const char *str, unsigned char ip[4])
555 tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
560 if ((c >= '0') && (c <= '9'))
563 tmp[num]=tmp[num]*10+c-'0';
564 if (tmp[num] > 255) return(0);
569 if (num == 3) return(0);
573 else if (c == '\0' && (num == 3) && ok)
585 int BIO_get_accept_socket(char *host, int bind_mode)
588 struct sockaddr server,client;
589 struct sockaddr_in *sa_in;
590 int s=INVALID_SOCKET,cs;
598 if (BIO_sock_init() != 1) return(INVALID_SOCKET);
600 if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
616 if (p) *p++='\0'; /* points at last ':', '::port' is special [see below] */
621 static union { void *p;
622 int (*f)(const char *,const char *,
623 const struct addrinfo *,
625 } p_getaddrinfo = {NULL};
626 static union { void *p;
627 void (*f)(struct addrinfo *);
628 } p_freeaddrinfo = {NULL};
629 struct addrinfo *res,hint;
631 if (p_getaddrinfo.p==NULL)
633 if ((p_getaddrinfo.p=DSO_global_lookup("getaddrinfo"))==NULL ||
634 (p_freeaddrinfo.p=DSO_global_lookup("freeaddrinfo"))==NULL)
635 p_getaddrinfo.p=(void*)-1;
637 if (p_getaddrinfo.p==(void *)-1) break;
639 /* '::port' enforces IPv6 wildcard listener. Some OSes,
640 * e.g. Solaris, default to IPv6 without any hint. Also
641 * note that commonly IPv6 wildchard socket can service
642 * IPv4 connections just as well... */
643 memset(&hint,0,sizeof(hint));
648 if (h[1]=='\0') h=NULL;
650 hint.ai_family = AF_INET6;
655 else if (h[0]=='*' && h[1]=='\0')
659 if ((*p_getaddrinfo.f)(h,p,&hint,&res)) break;
660 server = *res->ai_addr;
661 (*p_freeaddrinfo.f)(res);
666 if (!BIO_get_port(p,&port)) goto err;
668 memset((char *)&server,0,sizeof(server));
669 sa_in = (struct sockaddr_in *)&server;
670 sa_in->sin_family=AF_INET;
671 sa_in->sin_port=htons(port);
673 if (h == NULL || strcmp(h,"*") == 0)
674 sa_in->sin_addr.s_addr=INADDR_ANY;
677 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
679 ((unsigned long)ip[0]<<24L)|
680 ((unsigned long)ip[1]<<16L)|
681 ((unsigned long)ip[2]<< 8L)|
682 ((unsigned long)ip[3]);
683 sa_in->sin_addr.s_addr=htonl(l);
687 s=socket(server.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
688 if (s == INVALID_SOCKET)
690 SYSerr(SYS_F_SOCKET,get_last_socket_error());
691 ERR_add_error_data(3,"port='",host,"'");
692 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
697 if (bind_mode == BIO_BIND_REUSEADDR)
701 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
702 bind_mode=BIO_BIND_NORMAL;
705 if (bind(s,&server,sizeof(server)) == -1)
708 err_num=get_last_socket_error();
709 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
710 (err_num == EADDRINUSE))
713 if (h == NULL || strcmp(h,"*") == 0)
716 if (client.sa_family == AF_INET6)
718 struct sockaddr_in6 *sin6 =
719 (struct sockaddr_in6 *)&client;
720 memset(&sin6->sin6_addr,0,sizeof(sin6->sin6_addr));
721 sin6->sin6_addr.s6_addr[15]=1;
725 if (client.sa_family == AF_INET)
727 struct sockaddr_in *sin6 =
728 (struct sockaddr_in *)&client;
729 sin6->sin_addr.s_addr=htonl(0x7F000001);
733 cs=socket(client.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
734 if (cs != INVALID_SOCKET)
737 ii=connect(cs,(struct sockaddr *)&client,
740 if (ii == INVALID_SOCKET)
742 bind_mode=BIO_BIND_REUSEADDR;
751 SYSerr(SYS_F_BIND,err_num);
752 ERR_add_error_data(3,"port='",host,"'");
753 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
756 if (listen(s,MAX_LISTEN) == -1)
758 SYSerr(SYS_F_BIND,get_last_socket_error());
759 ERR_add_error_data(3,"port='",host,"'");
760 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
765 if (str != NULL) OPENSSL_free(str);
766 if ((ret == 0) && (s != INVALID_SOCKET))
774 int BIO_accept(int sock, char **addr)
776 int ret=INVALID_SOCKET;
777 struct sockaddr from;
778 struct sockaddr_in *sa_in;
784 memset(&from,0,sizeof(from));
786 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
787 * of type (int *) whereas under other systems it is (void *) if
788 * you don't have a cast it will choke the compiler: if you do
789 * have a cast then you can either go for (int *) or (void *).
791 ret=accept(sock,&from,(void *)&len);
792 if (ret == INVALID_SOCKET)
794 if(BIO_sock_should_retry(ret)) return -2;
795 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
796 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
800 if (addr == NULL) goto end;
803 # if defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_BEOS_BONE) || defined(OPENSSL_SYS_MSDOS)
804 # define SOCKLEN_T size_t
806 # define SOCKLEN_T socklen_t
809 char h[NI_MAXHOST],s[NI_MAXSERV];
811 static union { void *p;
812 int (*f)(const struct sockaddr *,SOCKLEN_T,
813 char *,size_t,char *,size_t,int);
814 } p_getnameinfo = {NULL};
816 if (p_getnameinfo.p==NULL)
818 if ((p_getnameinfo.p=DSO_global_lookup("getnameinfo"))==NULL)
819 p_getnameinfo.p=(void*)-1;
821 if (p_getnameinfo.p==(void *)-1) break;
823 if ((*p_getnameinfo.f)(&from,sizeof(from),h,sizeof(h),s,sizeof(s),
824 NI_NUMERICHOST|NI_NUMERICSERV)) break;
825 nl = strlen(h)+strlen(s)+2; if (len<24) len=24;
827 if (p) { *p = '\0'; p = OPENSSL_realloc(p,nl); }
828 else { p = OPENSSL_malloc(nl); }
831 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
835 BIO_snprintf(*addr,nl,"%s:%s",h,s);
839 if (from.sa_family != AF_INET) goto end;
840 sa_in = (struct sockaddr_in *)&from;
841 l=ntohl(sa_in->sin_addr.s_addr);
842 port=ntohs(sa_in->sin_port);
845 if ((p=OPENSSL_malloc(24)) == NULL)
847 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
852 BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d",
853 (unsigned char)(l>>24L)&0xff,
854 (unsigned char)(l>>16L)&0xff,
855 (unsigned char)(l>> 8L)&0xff,
856 (unsigned char)(l )&0xff,
862 int BIO_set_tcp_ndelay(int s, int on)
865 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
876 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
882 int BIO_socket_nbio(int s, int mode)
889 ret=BIO_socket_ioctl(s,FIONBIO,&l);