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;
91 #if defined(OPENSSL_SYS_BEOS_BONE)
92 /* BONE's IP6 support is incomplete */
97 static unsigned long BIO_ghbn_hits=0L;
98 static unsigned long BIO_ghbn_miss=0L;
101 static struct ghbn_cache_st
106 } ghbn_cache[GHBN_NUM];
109 static int get_ip(const char *str,unsigned char *ip);
111 static void ghbn_free(struct hostent *a);
112 static struct hostent *ghbn_dup(struct hostent *a);
114 int BIO_get_host_ip(const char *str, unsigned char *ip)
124 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
128 /* At this point, we have something that is most probably correct
129 in some way, so let's init the socket. */
130 if (BIO_sock_init() != 1)
131 return 0; /* don't generate another error code here */
133 /* If the string actually contained an IP address, we need not do
135 if (i > 0) return(1);
137 /* do a gethostbyname */
138 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
140 he=BIO_gethostbyname(str);
143 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
147 /* cast to short because of win16 winsock definition */
148 if ((short)he->h_addrtype != AF_INET)
150 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
154 ip[i]=he->h_addr_list[0][i];
159 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
162 ERR_add_error_data(2,"host=",str);
169 int BIO_get_port(const char *str, unsigned short *port_ptr)
176 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
181 *port_ptr=(unsigned short)i;
184 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
185 /* Note: under VMS with SOCKETSHR, it seems like the first
186 * parameter is 'char *', instead of 'const char *'
189 s=getservbyname((char *)str,"tcp");
191 s=getservbyname(str,"tcp");
194 *port_ptr=ntohs((unsigned short)s->s_port);
195 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
198 if (strcmp(str,"http") == 0)
200 else if (strcmp(str,"telnet") == 0)
202 else if (strcmp(str,"socks") == 0)
204 else if (strcmp(str,"https") == 0)
206 else if (strcmp(str,"ssl") == 0)
208 else if (strcmp(str,"ftp") == 0)
210 else if (strcmp(str,"gopher") == 0)
213 else if (strcmp(str,"wais") == 0)
218 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
219 ERR_add_error_data(3,"service='",str,"'");
227 int BIO_sock_error(int sock)
232 #if defined(OPENSSL_SYS_BEOS_R5)
237 /* Note: under Windows the third parameter is of type (char *)
238 * whereas under other systems it is (void *) if you don't have
239 * a cast it will choke the compiler: if you do have a cast then
240 * you can either go for (char *) or (void *).
242 i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
250 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
257 case BIO_GHBN_CTRL_HITS:
258 return(BIO_ghbn_hits);
260 case BIO_GHBN_CTRL_MISSES:
261 return(BIO_ghbn_miss);
263 case BIO_GHBN_CTRL_CACHE_SIZE:
266 case BIO_GHBN_CTRL_GET_ENTRY:
267 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
268 (ghbn_cache[iarg].order > 0))
271 if (p == NULL) return(0);
272 *p=ghbn_cache[iarg].name;
273 ghbn_cache[iarg].name[128]='\0';
278 case BIO_GHBN_CTRL_FLUSH:
279 for (i=0; i<GHBN_NUM; i++)
280 ghbn_cache[i].order=0;
290 static struct hostent *ghbn_dup(struct hostent *a)
296 ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
297 if (ret == NULL) return(NULL);
298 memset(ret,0,sizeof(struct hostent));
300 for (i=0; a->h_aliases[i] != NULL; i++)
303 ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
304 if (ret->h_aliases == NULL)
306 memset(ret->h_aliases, 0, i*sizeof(char *));
308 for (i=0; a->h_addr_list[i] != NULL; i++)
311 ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
312 if (ret->h_addr_list == NULL)
314 memset(ret->h_addr_list, 0, i*sizeof(char *));
316 j=strlen(a->h_name)+1;
317 if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
318 memcpy((char *)ret->h_name,a->h_name,j);
319 for (i=0; a->h_aliases[i] != NULL; i++)
321 j=strlen(a->h_aliases[i])+1;
322 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
323 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
325 ret->h_length=a->h_length;
326 ret->h_addrtype=a->h_addrtype;
327 for (i=0; a->h_addr_list[i] != NULL; i++)
329 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
331 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
344 static void ghbn_free(struct hostent *a)
351 if (a->h_aliases != NULL)
353 for (i=0; a->h_aliases[i] != NULL; i++)
354 OPENSSL_free(a->h_aliases[i]);
355 OPENSSL_free(a->h_aliases);
357 if (a->h_addr_list != NULL)
359 for (i=0; a->h_addr_list[i] != NULL; i++)
360 OPENSSL_free(a->h_addr_list[i]);
361 OPENSSL_free(a->h_addr_list);
363 if (a->h_name != NULL) OPENSSL_free(a->h_name);
369 struct hostent *BIO_gethostbyname(const char *name)
372 /* Caching gethostbyname() results forever is wrong,
373 * so we have to let the true gethostbyname() worry about this */
374 #if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__))
375 return gethostbyname((char*)name);
377 return gethostbyname(name);
382 unsigned long low= (unsigned long)-1;
386 /* It doesn't make sense to use locking here: The function interface
387 * is not thread-safe, because threads can never be sure when
388 * some other thread destroys the data they were given a pointer to.
390 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
395 for (i=0; i<GHBN_NUM; i++)
397 if (low > ghbn_cache[i].order)
399 low=ghbn_cache[i].order;
402 if (ghbn_cache[i].order > 0)
404 if (strncmp(name,ghbn_cache[i].name,128) == 0)
412 if (i == GHBN_NUM) /* no hit*/
415 /* Note: under VMS with SOCKETSHR, it seems like the first
416 * parameter is 'char *', instead of 'const char *'
418 # ifndef CONST_STRICT
419 ret=gethostbyname((char *)name);
421 ret=gethostbyname(name);
426 if (j > 128) /* too big to cache */
429 /* If we were trying to make this function thread-safe (which
430 * is bound to fail), we'd have to give up in this case
431 * (or allocate more memory). */
437 /* else add to cache */
438 if (ghbn_cache[lowi].ent != NULL)
439 ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
440 ghbn_cache[lowi].name[0] = '\0';
442 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
444 BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
447 strncpy(ghbn_cache[lowi].name,name,128);
448 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
453 ret= ghbn_cache[i].ent;
454 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
458 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
465 int BIO_sock_init(void)
467 #ifdef OPENSSL_SYS_WINDOWS
468 static struct WSAData wsa_state;
475 memset(&wsa_state,0,sizeof(wsa_state));
476 /* Not making wsa_state available to the rest of the
477 * code is formally wrong. But the structures we use
478 * are [beleived to be] invariable among Winsock DLLs,
479 * while API availability is [expected to be] probed
480 * at run-time with DSO_global_lookup. */
481 if (WSAStartup(0x0202,&wsa_state)!=0)
483 err=WSAGetLastError();
484 SYSerr(SYS_F_WSASTARTUP,err);
485 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
489 #endif /* OPENSSL_SYS_WINDOWS */
491 extern int _watt_do_exit;
492 _watt_do_exit = 0; /* don't make sock_init() call exit() */
497 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
505 wVerReq = MAKEWORD( 2, 0 );
506 err = WSAStartup(wVerReq,&wsaData);
509 SYSerr(SYS_F_WSASTARTUP,err);
510 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
519 void BIO_sock_cleanup(void)
521 #ifdef OPENSSL_SYS_WINDOWS
525 #if 0 /* this call is claimed to be non-present in Winsock2 */
526 WSACancelBlockingCall();
530 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
539 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
541 int BIO_socket_ioctl(int fd, long type, void *arg)
546 i=ioctlsocket(fd,type,(char *)arg);
548 i=ioctlsocket(fd,type,arg);
549 #endif /* __DJGPP__ */
551 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
554 #endif /* __VMS_VER */
556 /* The reason I have implemented this instead of using sscanf is because
557 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
558 static int get_ip(const char *str, unsigned char ip[4])
563 tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
568 if ((c >= '0') && (c <= '9'))
571 tmp[num]=tmp[num]*10+c-'0';
572 if (tmp[num] > 255) return(0);
577 if (num == 3) return(0);
581 else if (c == '\0' && (num == 3) && ok)
593 int BIO_get_accept_socket(char *host, int bind_mode)
596 struct sockaddr server,client;
597 struct sockaddr_in *sa_in;
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;
668 server = *res->ai_addr;
669 (*p_freeaddrinfo.f)(res);
674 if (!BIO_get_port(p,&port)) goto err;
676 memset((char *)&server,0,sizeof(server));
677 sa_in = (struct sockaddr_in *)&server;
678 sa_in->sin_family=AF_INET;
679 sa_in->sin_port=htons(port);
681 if (h == NULL || strcmp(h,"*") == 0)
682 sa_in->sin_addr.s_addr=INADDR_ANY;
685 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
687 ((unsigned long)ip[0]<<24L)|
688 ((unsigned long)ip[1]<<16L)|
689 ((unsigned long)ip[2]<< 8L)|
690 ((unsigned long)ip[3]);
691 sa_in->sin_addr.s_addr=htonl(l);
695 s=socket(server.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
696 if (s == INVALID_SOCKET)
698 SYSerr(SYS_F_SOCKET,get_last_socket_error());
699 ERR_add_error_data(3,"port='",host,"'");
700 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
705 if (bind_mode == BIO_BIND_REUSEADDR)
709 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
710 bind_mode=BIO_BIND_NORMAL;
713 if (bind(s,&server,sizeof(server)) == -1)
716 err_num=get_last_socket_error();
717 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
718 (err_num == EADDRINUSE))
721 if (h == NULL || strcmp(h,"*") == 0)
724 if (client.sa_family == AF_INET6)
726 struct sockaddr_in6 *sin6 =
727 (struct sockaddr_in6 *)&client;
728 memset(&sin6->sin6_addr,0,sizeof(sin6->sin6_addr));
729 sin6->sin6_addr.s6_addr[15]=1;
733 if (client.sa_family == AF_INET)
735 struct sockaddr_in *sin4 =
736 (struct sockaddr_in *)&client;
737 sin4->sin_addr.s_addr=htonl(0x7F000001);
741 cs=socket(client.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
742 if (cs != INVALID_SOCKET)
745 ii=connect(cs,(struct sockaddr *)&client,
748 if (ii == INVALID_SOCKET)
750 bind_mode=BIO_BIND_REUSEADDR;
759 SYSerr(SYS_F_BIND,err_num);
760 ERR_add_error_data(3,"port='",host,"'");
761 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
764 if (listen(s,MAX_LISTEN) == -1)
766 SYSerr(SYS_F_BIND,get_last_socket_error());
767 ERR_add_error_data(3,"port='",host,"'");
768 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
773 if (str != NULL) OPENSSL_free(str);
774 if ((ret == 0) && (s != INVALID_SOCKET))
782 int BIO_accept(int sock, char **addr)
784 int ret=INVALID_SOCKET;
785 struct sockaddr from;
786 struct sockaddr_in *sa_in;
792 memset(&from,0,sizeof(from));
794 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
795 * of type (int *) whereas under other systems it is (void *) if
796 * you don't have a cast it will choke the compiler: if you do
797 * have a cast then you can either go for (int *) or (void *).
799 ret=accept(sock,&from,(void *)&len);
800 if (ret == INVALID_SOCKET)
802 if(BIO_sock_should_retry(ret)) return -2;
803 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
804 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
808 if (addr == NULL) goto end;
812 char h[NI_MAXHOST],s[NI_MAXSERV];
814 static union { void *p;
815 int (*f)(const struct sockaddr *,size_t/*socklen_t*/,
816 char *,size_t,char *,size_t,int);
817 } p_getnameinfo = {NULL};
818 /* 2nd argument to getnameinfo is specified to
819 * be socklen_t. Unfortunately there is a number
820 * of environments where socklen_t is not defined.
821 * As it's passed by value, it's safe to pass it
822 * as size_t... <appro> */
824 if (p_getnameinfo.p==NULL)
826 if ((p_getnameinfo.p=DSO_global_lookup("getnameinfo"))==NULL)
827 p_getnameinfo.p=(void*)-1;
829 if (p_getnameinfo.p==(void *)-1) break;
831 if ((*p_getnameinfo.f)(&from,sizeof(from),h,sizeof(h),s,sizeof(s),
832 NI_NUMERICHOST|NI_NUMERICSERV)) break;
833 nl = strlen(h)+strlen(s)+2; if (len<24) len=24;
835 if (p) { *p = '\0'; p = OPENSSL_realloc(p,nl); }
836 else { p = OPENSSL_malloc(nl); }
839 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
843 BIO_snprintf(*addr,nl,"%s:%s",h,s);
847 if (from.sa_family != AF_INET) goto end;
848 sa_in = (struct sockaddr_in *)&from;
849 l=ntohl(sa_in->sin_addr.s_addr);
850 port=ntohs(sa_in->sin_port);
853 if ((p=OPENSSL_malloc(24)) == NULL)
855 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
860 BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d",
861 (unsigned char)(l>>24L)&0xff,
862 (unsigned char)(l>>16L)&0xff,
863 (unsigned char)(l>> 8L)&0xff,
864 (unsigned char)(l )&0xff,
870 int BIO_set_tcp_ndelay(int s, int on)
873 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
884 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
890 int BIO_socket_nbio(int s, int mode)
897 ret=BIO_socket_ioctl(s,FIONBIO,&l);