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)
591 struct sockaddr server,client;
592 struct sockaddr_in *sa_in;
593 int s=INVALID_SOCKET,cs;
601 if (BIO_sock_init() != 1) return(INVALID_SOCKET);
603 if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
619 if (p) *p++='\0'; /* points at last ':', '::port' is special [see below] */
624 static union { void *p;
625 int (*f)(const char *,const char *,
626 const struct addrinfo *,
628 } p_getaddrinfo = {NULL};
629 static union { void *p;
630 void (*f)(struct addrinfo *);
631 } p_freeaddrinfo = {NULL};
632 struct addrinfo *res,hint;
634 if (p_getaddrinfo.p==NULL)
636 if ((p_getaddrinfo.p=DSO_global_lookup("getaddrinfo"))==NULL ||
637 (p_freeaddrinfo.p=DSO_global_lookup("freeaddrinfo"))==NULL)
638 p_getaddrinfo.p=(void*)-1;
640 if (p_getaddrinfo.p==(void *)-1) break;
642 /* '::port' enforces IPv6 wildcard listener. Some OSes,
643 * e.g. Solaris, default to IPv6 without any hint. Also
644 * note that commonly IPv6 wildchard socket can service
645 * IPv4 connections just as well... */
646 memset(&hint,0,sizeof(hint));
651 if (h[1]=='\0') h=NULL;
653 hint.ai_family = AF_INET6;
658 else if (h[0]=='*' && h[1]=='\0')
662 if ((*p_getaddrinfo.f)(h,p,&hint,&res)) break;
663 server = *res->ai_addr;
664 (*p_freeaddrinfo.f)(res);
669 if (!BIO_get_port(p,&port)) goto err;
671 memset((char *)&server,0,sizeof(server));
672 sa_in = (struct sockaddr_in *)&server;
673 sa_in->sin_family=AF_INET;
674 sa_in->sin_port=htons(port);
676 if (h == NULL || strcmp(h,"*") == 0)
677 sa_in->sin_addr.s_addr=INADDR_ANY;
680 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
682 ((unsigned long)ip[0]<<24L)|
683 ((unsigned long)ip[1]<<16L)|
684 ((unsigned long)ip[2]<< 8L)|
685 ((unsigned long)ip[3]);
686 sa_in->sin_addr.s_addr=htonl(l);
690 s=socket(server.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
691 if (s == INVALID_SOCKET)
693 SYSerr(SYS_F_SOCKET,get_last_socket_error());
694 ERR_add_error_data(3,"port='",host,"'");
695 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
700 if (bind_mode == BIO_BIND_REUSEADDR)
704 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
705 bind_mode=BIO_BIND_NORMAL;
708 if (bind(s,&server,sizeof(server)) == -1)
711 err_num=get_last_socket_error();
712 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
713 (err_num == EADDRINUSE))
716 if (h == NULL || strcmp(h,"*") == 0)
719 if (client.sa_family == AF_INET6)
721 struct sockaddr_in6 *sin6 =
722 (struct sockaddr_in6 *)&client;
723 memset(&sin6->sin6_addr,0,sizeof(sin6->sin6_addr));
724 sin6->sin6_addr.s6_addr[15]=1;
728 if (client.sa_family == AF_INET)
730 struct sockaddr_in *sin4 =
731 (struct sockaddr_in *)&client;
732 sin4->sin_addr.s_addr=htonl(0x7F000001);
736 cs=socket(client.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
737 if (cs != INVALID_SOCKET)
740 ii=connect(cs,(struct sockaddr *)&client,
743 if (ii == INVALID_SOCKET)
745 bind_mode=BIO_BIND_REUSEADDR;
754 SYSerr(SYS_F_BIND,err_num);
755 ERR_add_error_data(3,"port='",host,"'");
756 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
759 if (listen(s,MAX_LISTEN) == -1)
761 SYSerr(SYS_F_BIND,get_last_socket_error());
762 ERR_add_error_data(3,"port='",host,"'");
763 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
768 if (str != NULL) OPENSSL_free(str);
769 if ((ret == 0) && (s != INVALID_SOCKET))
777 int BIO_accept(int sock, char **addr)
779 int ret=INVALID_SOCKET;
780 struct sockaddr from;
781 struct sockaddr_in *sa_in;
787 memset(&from,0,sizeof(from));
789 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
790 * of type (int *) whereas under other systems it is (void *) if
791 * you don't have a cast it will choke the compiler: if you do
792 * have a cast then you can either go for (int *) or (void *).
794 ret=accept(sock,&from,(void *)&len);
795 if (ret == INVALID_SOCKET)
797 if(BIO_sock_should_retry(ret)) return -2;
798 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
799 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
803 if (addr == NULL) goto end;
807 char h[NI_MAXHOST],s[NI_MAXSERV];
809 static union { void *p;
810 int (*f)(const struct sockaddr *,size_t/*socklen_t*/,
811 char *,size_t,char *,size_t,int);
812 } p_getnameinfo = {NULL};
813 /* 2nd argument to getnameinfo is specified to
814 * be socklen_t. Unfortunately there is a number
815 * of environments where socklen_t is not defined.
816 * As it's passed by value, it's safe to pass it
817 * as size_t... <appro> */
819 if (p_getnameinfo.p==NULL)
821 if ((p_getnameinfo.p=DSO_global_lookup("getnameinfo"))==NULL)
822 p_getnameinfo.p=(void*)-1;
824 if (p_getnameinfo.p==(void *)-1) break;
826 if ((*p_getnameinfo.f)(&from,sizeof(from),h,sizeof(h),s,sizeof(s),
827 NI_NUMERICHOST|NI_NUMERICSERV)) break;
828 nl = strlen(h)+strlen(s)+2; if (len<24) len=24;
830 if (p) { *p = '\0'; p = OPENSSL_realloc(p,nl); }
831 else { p = OPENSSL_malloc(nl); }
834 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
838 BIO_snprintf(*addr,nl,"%s:%s",h,s);
842 if (from.sa_family != AF_INET) goto end;
843 sa_in = (struct sockaddr_in *)&from;
844 l=ntohl(sa_in->sin_addr.s_addr);
845 port=ntohs(sa_in->sin_port);
848 if ((p=OPENSSL_malloc(24)) == NULL)
850 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
855 BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d",
856 (unsigned char)(l>>24L)&0xff,
857 (unsigned char)(l>>16L)&0xff,
858 (unsigned char)(l>> 8L)&0xff,
859 (unsigned char)(l )&0xff,
865 int BIO_set_tcp_ndelay(int s, int on)
868 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
879 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
885 int BIO_socket_nbio(int s, int mode)
892 ret=BIO_socket_ioctl(s,FIONBIO,&l);