Remove DJGPP (and therefore WATT32) #ifdef's.
[openssl.git] / crypto / bio / b_sock.c
1 /* crypto/bio/b_sock.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
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.
8  * 
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).
15  * 
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.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
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)"
40  * 
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
51  * SUCH DAMAGE.
52  * 
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.]
57  */
58
59 #include <stdio.h>
60 #include <stdlib.h>
61 #include <errno.h>
62 #define USE_SOCKETS
63 #include "cryptlib.h"
64 #include <openssl/bio.h>
65 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
66 #include <netdb.h>
67 #if defined(NETWARE_CLIB)
68 #include <sys/ioctl.h>
69 NETDB_DEFINE_CONTEXT
70 #endif
71 #endif
72
73 #ifndef OPENSSL_NO_SOCK
74
75 #include <openssl/dso.h>
76
77 #define SOCKET_PROTOCOL IPPROTO_TCP
78
79 #ifdef SO_MAXCONN
80 #define MAX_LISTEN  SO_MAXCONN
81 #elif defined(SOMAXCONN)
82 #define MAX_LISTEN  SOMAXCONN
83 #else
84 #define MAX_LISTEN  32
85 #endif
86
87 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
88 static int wsa_init_done=0;
89 #endif
90
91 /*
92  * WSAAPI specifier is required to make indirect calls to run-time
93  * linked WinSock 2 functions used in this module, to be specific
94  * [get|free]addrinfo and getnameinfo. This is because WinSock uses
95  * uses non-C calling convention, __stdcall vs. __cdecl, on x86
96  * Windows. On non-WinSock platforms WSAAPI needs to be void.
97  */
98 #ifndef WSAAPI
99 #define WSAAPI
100 #endif
101
102 #if 0
103 static unsigned long BIO_ghbn_hits=0L;
104 static unsigned long BIO_ghbn_miss=0L;
105
106 #define GHBN_NUM        4
107 static struct ghbn_cache_st
108         {
109         char name[129];
110         struct hostent *ent;
111         unsigned long order;
112         } ghbn_cache[GHBN_NUM];
113 #endif
114
115 static int get_ip(const char *str,unsigned char *ip);
116 #if 0
117 static void ghbn_free(struct hostent *a);
118 static struct hostent *ghbn_dup(struct hostent *a);
119 #endif
120 int BIO_get_host_ip(const char *str, unsigned char *ip)
121         {
122         int i;
123         int err = 1;
124         int locked = 0;
125         struct hostent *he;
126
127         i=get_ip(str,ip);
128         if (i < 0)
129                 {
130                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
131                 goto err;
132                 }
133
134         /* At this point, we have something that is most probably correct
135            in some way, so let's init the socket. */
136         if (BIO_sock_init() != 1)
137                 return 0; /* don't generate another error code here */
138
139         /* If the string actually contained an IP address, we need not do
140            anything more */
141         if (i > 0) return(1);
142
143         /* do a gethostbyname */
144         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
145         locked = 1;
146         he=BIO_gethostbyname(str);
147         if (he == NULL)
148                 {
149                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
150                 goto err;
151                 }
152
153         /* cast to short because of win16 winsock definition */
154         if ((short)he->h_addrtype != AF_INET)
155                 {
156                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
157                 goto err;
158                 }
159         for (i=0; i<4; i++)
160                 ip[i]=he->h_addr_list[0][i];
161         err = 0;
162
163  err:
164         if (locked)
165                 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
166         if (err)
167                 {
168                 ERR_add_error_data(2,"host=",str);
169                 return 0;
170                 }
171         else
172                 return 1;
173         }
174
175 int BIO_get_port(const char *str, unsigned short *port_ptr)
176         {
177         int i;
178         struct servent *s;
179
180         if (str == NULL)
181                 {
182                 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
183                 return(0);
184                 }
185         i=atoi(str);
186         if (i != 0)
187                 *port_ptr=(unsigned short)i;
188         else
189                 {
190                 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
191                 /* Note: under VMS with SOCKETSHR, it seems like the first
192                  * parameter is 'char *', instead of 'const char *'
193                  */
194 #ifndef CONST_STRICT
195                 s=getservbyname((char *)str,"tcp");
196 #else
197                 s=getservbyname(str,"tcp");
198 #endif
199                 if(s != NULL)
200                         *port_ptr=ntohs((unsigned short)s->s_port);
201                 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
202                 if(s == NULL)
203                         {
204                         if (strcmp(str,"http") == 0)
205                                 *port_ptr=80;
206                         else if (strcmp(str,"telnet") == 0)
207                                 *port_ptr=23;
208                         else if (strcmp(str,"socks") == 0)
209                                 *port_ptr=1080;
210                         else if (strcmp(str,"https") == 0)
211                                 *port_ptr=443;
212                         else if (strcmp(str,"ssl") == 0)
213                                 *port_ptr=443;
214                         else if (strcmp(str,"ftp") == 0)
215                                 *port_ptr=21;
216                         else if (strcmp(str,"gopher") == 0)
217                                 *port_ptr=70;
218 #if 0
219                         else if (strcmp(str,"wais") == 0)
220                                 *port_ptr=21;
221 #endif
222                         else
223                                 {
224                                 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
225                                 ERR_add_error_data(3,"service='",str,"'");
226                                 return(0);
227                                 }
228                         }
229                 }
230         return(1);
231         }
232
233 int BIO_sock_error(int sock)
234         {
235         int j,i;
236         union { size_t s; int i; } size;
237                  
238 #if defined(OPENSSL_SYS_BEOS_R5)
239         return 0;
240 #endif
241  
242         /* heuristic way to adapt for platforms that expect 64-bit optlen */
243         size.s=0, size.i=sizeof(j);
244         /* Note: under Windows the third parameter is of type (char *)
245          * whereas under other systems it is (void *) if you don't have
246          * a cast it will choke the compiler: if you do have a cast then
247          * you can either go for (char *) or (void *).
248          */
249         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
250         if (i < 0)
251                 return(1);
252         else
253                 return(j);
254         }
255
256 #if 0
257 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
258         {
259         int i;
260         char **p;
261
262         switch (cmd)
263                 {
264         case BIO_GHBN_CTRL_HITS:
265                 return(BIO_ghbn_hits);
266                 /* break; */
267         case BIO_GHBN_CTRL_MISSES:
268                 return(BIO_ghbn_miss);
269                 /* break; */
270         case BIO_GHBN_CTRL_CACHE_SIZE:
271                 return(GHBN_NUM);
272                 /* break; */
273         case BIO_GHBN_CTRL_GET_ENTRY:
274                 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
275                         (ghbn_cache[iarg].order > 0))
276                         {
277                         p=(char **)parg;
278                         if (p == NULL) return(0);
279                         *p=ghbn_cache[iarg].name;
280                         ghbn_cache[iarg].name[128]='\0';
281                         return(1);
282                         }
283                 return(0);
284                 /* break; */
285         case BIO_GHBN_CTRL_FLUSH:
286                 for (i=0; i<GHBN_NUM; i++)
287                         ghbn_cache[i].order=0;
288                 break;
289         default:
290                 return(0);
291                 }
292         return(1);
293         }
294 #endif
295
296 #if 0
297 static struct hostent *ghbn_dup(struct hostent *a)
298         {
299         struct hostent *ret;
300         int i,j;
301
302         MemCheck_off();
303         ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
304         if (ret == NULL) return(NULL);
305         memset(ret,0,sizeof(struct hostent));
306
307         for (i=0; a->h_aliases[i] != NULL; i++)
308                 ;
309         i++;
310         ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
311         if (ret->h_aliases == NULL)
312                 goto err;
313         memset(ret->h_aliases, 0, i*sizeof(char *));
314
315         for (i=0; a->h_addr_list[i] != NULL; i++)
316                 ;
317         i++;
318         ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
319         if (ret->h_addr_list == NULL)
320                 goto err;
321         memset(ret->h_addr_list, 0, i*sizeof(char *));
322
323         j=strlen(a->h_name)+1;
324         if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
325         memcpy((char *)ret->h_name,a->h_name,j);
326         for (i=0; a->h_aliases[i] != NULL; i++)
327                 {
328                 j=strlen(a->h_aliases[i])+1;
329                 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
330                 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
331                 }
332         ret->h_length=a->h_length;
333         ret->h_addrtype=a->h_addrtype;
334         for (i=0; a->h_addr_list[i] != NULL; i++)
335                 {
336                 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
337                         goto err;
338                 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
339                 }
340         if (0)
341                 {
342 err:    
343                 if (ret != NULL)
344                         ghbn_free(ret);
345                 ret=NULL;
346                 }
347         MemCheck_on();
348         return(ret);
349         }
350
351 static void ghbn_free(struct hostent *a)
352         {
353         int i;
354
355         if(a == NULL)
356             return;
357
358         if (a->h_aliases != NULL)
359                 {
360                 for (i=0; a->h_aliases[i] != NULL; i++)
361                         OPENSSL_free(a->h_aliases[i]);
362                 OPENSSL_free(a->h_aliases);
363                 }
364         if (a->h_addr_list != NULL)
365                 {
366                 for (i=0; a->h_addr_list[i] != NULL; i++)
367                         OPENSSL_free(a->h_addr_list[i]);
368                 OPENSSL_free(a->h_addr_list);
369                 }
370         if (a->h_name != NULL) OPENSSL_free(a->h_name);
371         OPENSSL_free(a);
372         }
373
374 #endif
375
376 struct hostent *BIO_gethostbyname(const char *name)
377         {
378 #if 1
379         /* Caching gethostbyname() results forever is wrong,
380          * so we have to let the true gethostbyname() worry about this */
381 #if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__))
382         return gethostbyname((char*)name);
383 #else
384         return gethostbyname(name);
385 #endif
386 #else
387         struct hostent *ret;
388         int i,lowi=0,j;
389         unsigned long low= (unsigned long)-1;
390
391
392 #  if 0
393         /* It doesn't make sense to use locking here: The function interface
394          * is not thread-safe, because threads can never be sure when
395          * some other thread destroys the data they were given a pointer to.
396          */
397         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
398 #  endif
399         j=strlen(name);
400         if (j < 128)
401                 {
402                 for (i=0; i<GHBN_NUM; i++)
403                         {
404                         if (low > ghbn_cache[i].order)
405                                 {
406                                 low=ghbn_cache[i].order;
407                                 lowi=i;
408                                 }
409                         if (ghbn_cache[i].order > 0)
410                                 {
411                                 if (strncmp(name,ghbn_cache[i].name,128) == 0)
412                                         break;
413                                 }
414                         }
415                 }
416         else
417                 i=GHBN_NUM;
418
419         if (i == GHBN_NUM) /* no hit*/
420                 {
421                 BIO_ghbn_miss++;
422                 /* Note: under VMS with SOCKETSHR, it seems like the first
423                  * parameter is 'char *', instead of 'const char *'
424                  */
425 #  ifndef CONST_STRICT
426                 ret=gethostbyname((char *)name);
427 #  else
428                 ret=gethostbyname(name);
429 #  endif
430
431                 if (ret == NULL)
432                         goto end;
433                 if (j > 128) /* too big to cache */
434                         {
435 #  if 0
436                         /* If we were trying to make this function thread-safe (which
437                          * is bound to fail), we'd have to give up in this case
438                          * (or allocate more memory). */
439                         ret = NULL;
440 #  endif
441                         goto end;
442                         }
443
444                 /* else add to cache */
445                 if (ghbn_cache[lowi].ent != NULL)
446                         ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
447                 ghbn_cache[lowi].name[0] = '\0';
448
449                 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
450                         {
451                         BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
452                         goto end;
453                         }
454                 strncpy(ghbn_cache[lowi].name,name,128);
455                 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
456                 }
457         else
458                 {
459                 BIO_ghbn_hits++;
460                 ret= ghbn_cache[i].ent;
461                 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
462                 }
463 end:
464 #  if 0
465         CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
466 #  endif
467         return(ret);
468 #endif
469         }
470
471
472 int BIO_sock_init(void)
473         {
474 #ifdef OPENSSL_SYS_WINDOWS
475         static struct WSAData wsa_state;
476
477         if (!wsa_init_done)
478                 {
479                 int err;
480           
481                 wsa_init_done=1;
482                 memset(&wsa_state,0,sizeof(wsa_state));
483                 /* Not making wsa_state available to the rest of the
484                  * code is formally wrong. But the structures we use
485                  * are [beleived to be] invariable among Winsock DLLs,
486                  * while API availability is [expected to be] probed
487                  * at run-time with DSO_global_lookup. */
488                 if (WSAStartup(0x0202,&wsa_state)!=0)
489                         {
490                         err=WSAGetLastError();
491                         SYSerr(SYS_F_WSASTARTUP,err);
492                         BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
493                         return(-1);
494                         }
495                 }
496 #endif /* OPENSSL_SYS_WINDOWS */
497
498 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
499     WORD wVerReq;
500     WSADATA wsaData;
501     int err;
502
503     if (!wsa_init_done)
504     {
505         wsa_init_done=1;
506         wVerReq = MAKEWORD( 2, 0 );
507         err = WSAStartup(wVerReq,&wsaData);
508         if (err != 0)
509         {
510             SYSerr(SYS_F_WSASTARTUP,err);
511             BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
512             return(-1);
513                         }
514                 }
515 #endif
516
517         return(1);
518         }
519
520 void BIO_sock_cleanup(void)
521         {
522 #ifdef OPENSSL_SYS_WINDOWS
523         if (wsa_init_done)
524                 {
525                 wsa_init_done=0;
526 #if 0           /* this call is claimed to be non-present in Winsock2 */
527                 WSACancelBlockingCall();
528 #endif
529                 WSACleanup();
530                 }
531 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
532    if (wsa_init_done)
533         {
534         wsa_init_done=0;
535         WSACleanup();
536                 }
537 #endif
538         }
539
540 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
541
542 int BIO_socket_ioctl(int fd, long type, void *arg)
543         {
544         int i;
545
546 # if defined(OPENSSL_SYS_VMS)
547         /* 2011-02-18 SMS.
548          * VMS ioctl() can't tolerate a 64-bit "void *arg", but we
549          * observe that all the consumers pass in an "unsigned long *",
550          * so we arrange a local copy with a short pointer, and use
551          * that, instead.
552          */
553 #  if __INITIAL_POINTER_SIZE == 64
554 #   define ARG arg_32p
555 #   pragma pointer_size save
556 #   pragma pointer_size 32
557         unsigned long arg_32;
558         unsigned long *arg_32p;
559 #   pragma pointer_size restore
560         arg_32p = &arg_32;
561         arg_32 = *((unsigned long *) arg);
562 #  else /* __INITIAL_POINTER_SIZE == 64 */
563 #   define ARG arg
564 #  endif /* __INITIAL_POINTER_SIZE == 64 [else] */
565 # else /* defined(OPENSSL_SYS_VMS) */
566 #  define ARG arg
567 # endif /* defined(OPENSSL_SYS_VMS) [else] */
568         i=ioctlsocket(fd,type,ARG);
569
570         if (i < 0)
571                 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
572         return(i);
573         }
574 #endif /* __VMS_VER */
575
576 /* The reason I have implemented this instead of using sscanf is because
577  * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
578 static int get_ip(const char *str, unsigned char ip[4])
579         {
580         unsigned int tmp[4];
581         int num=0,c,ok=0;
582
583         tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
584
585         for (;;)
586                 {
587                 c= *(str++);
588                 if ((c >= '0') && (c <= '9'))
589                         {
590                         ok=1;
591                         tmp[num]=tmp[num]*10+c-'0';
592                         if (tmp[num] > 255) return(0);
593                         }
594                 else if (c == '.')
595                         {
596                         if (!ok) return(-1);
597                         if (num == 3) return(0);
598                         num++;
599                         ok=0;
600                         }
601                 else if (c == '\0' && (num == 3) && ok)
602                         break;
603                 else
604                         return(0);
605                 }
606         ip[0]=tmp[0];
607         ip[1]=tmp[1];
608         ip[2]=tmp[2];
609         ip[3]=tmp[3];
610         return(1);
611         }
612
613 int BIO_get_accept_socket(char *host, int bind_mode)
614         {
615         int ret=0;
616         union {
617                 struct sockaddr sa;
618                 struct sockaddr_in sa_in;
619 #if OPENSSL_USE_IPV6
620                 struct sockaddr_in6 sa_in6;
621 #endif
622         } server,client;
623         int s=INVALID_SOCKET,cs,addrlen;
624         unsigned char ip[4];
625         unsigned short port;
626         char *str=NULL,*e;
627         char *h,*p;
628         unsigned long l;
629         int err_num;
630
631         if (BIO_sock_init() != 1) return(INVALID_SOCKET);
632
633         if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
634
635         h=p=NULL;
636         h=str;
637         for (e=str; *e; e++)
638                 {
639                 if (*e == ':')
640                         {
641                         p=e;
642                         }
643                 else if (*e == '/')
644                         {
645                         *e='\0';
646                         break;
647                         }
648                 }
649         if (p)  *p++='\0';      /* points at last ':', '::port' is special [see below] */
650         else    p=h,h=NULL;
651
652 #ifdef EAI_FAMILY
653         do {
654         static union {  void *p;
655                         int (WSAAPI *f)(const char *,const char *,
656                                  const struct addrinfo *,
657                                  struct addrinfo **);
658                         } p_getaddrinfo = {NULL};
659         static union {  void *p;
660                         void (WSAAPI *f)(struct addrinfo *);
661                         } p_freeaddrinfo = {NULL};
662         struct addrinfo *res,hint;
663
664         if (p_getaddrinfo.p==NULL)
665                 {
666                 if ((p_getaddrinfo.p=DSO_global_lookup("getaddrinfo"))==NULL ||
667                     (p_freeaddrinfo.p=DSO_global_lookup("freeaddrinfo"))==NULL)
668                         p_getaddrinfo.p=(void*)-1;
669                 }
670         if (p_getaddrinfo.p==(void *)-1) break;
671
672         /* '::port' enforces IPv6 wildcard listener. Some OSes,
673          * e.g. Solaris, default to IPv6 without any hint. Also
674          * note that commonly IPv6 wildchard socket can service
675          * IPv4 connections just as well...  */
676         memset(&hint,0,sizeof(hint));
677         hint.ai_flags = AI_PASSIVE;
678         if (h)
679                 {
680                 if (strchr(h,':'))
681                         {
682                         if (h[1]=='\0') h=NULL;
683 #if OPENSSL_USE_IPV6
684                         hint.ai_family = AF_INET6;
685 #else
686                         h=NULL;
687 #endif
688                         }
689                 else if (h[0]=='*' && h[1]=='\0')
690                         {
691                         hint.ai_family = AF_INET;
692                         h=NULL;
693                         }
694                 }
695
696         if ((*p_getaddrinfo.f)(h,p,&hint,&res)) break;
697
698         addrlen = res->ai_addrlen<=sizeof(server) ?
699                         res->ai_addrlen :
700                         sizeof(server);
701         memcpy(&server, res->ai_addr, addrlen);
702
703         (*p_freeaddrinfo.f)(res);
704         goto again;
705         } while (0);
706 #endif
707
708         if (!BIO_get_port(p,&port)) goto err;
709
710         memset((char *)&server,0,sizeof(server));
711         server.sa_in.sin_family=AF_INET;
712         server.sa_in.sin_port=htons(port);
713         addrlen = sizeof(server.sa_in);
714
715         if (h == NULL || strcmp(h,"*") == 0)
716                 server.sa_in.sin_addr.s_addr=INADDR_ANY;
717         else
718                 {
719                 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
720                 l=(unsigned long)
721                         ((unsigned long)ip[0]<<24L)|
722                         ((unsigned long)ip[1]<<16L)|
723                         ((unsigned long)ip[2]<< 8L)|
724                         ((unsigned long)ip[3]);
725                 server.sa_in.sin_addr.s_addr=htonl(l);
726                 }
727
728 again:
729         s=socket(server.sa.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
730         if (s == INVALID_SOCKET)
731                 {
732                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
733                 ERR_add_error_data(3,"port='",host,"'");
734                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
735                 goto err;
736                 }
737
738 #ifdef SO_REUSEADDR
739         if (bind_mode == BIO_BIND_REUSEADDR)
740                 {
741                 int i=1;
742
743                 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
744                 bind_mode=BIO_BIND_NORMAL;
745                 }
746 #endif
747         if (bind(s,&server.sa,addrlen) == -1)
748                 {
749 #ifdef SO_REUSEADDR
750                 err_num=get_last_socket_error();
751                 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
752 #ifdef OPENSSL_SYS_WINDOWS
753                         /* Some versions of Windows define EADDRINUSE to
754                          * a dummy value.
755                          */
756                         (err_num == WSAEADDRINUSE))
757 #else
758                         (err_num == EADDRINUSE))
759 #endif
760                         {
761                         client = server;
762                         if (h == NULL || strcmp(h,"*") == 0)
763                                 {
764 #if OPENSSL_USE_IPV6
765                                 if (client.sa.sa_family == AF_INET6)
766                                         {
767                                         memset(&client.sa_in6.sin6_addr,0,sizeof(client.sa_in6.sin6_addr));
768                                         client.sa_in6.sin6_addr.s6_addr[15]=1;
769                                         }
770                                 else
771 #endif
772                                 if (client.sa.sa_family == AF_INET)
773                                         {
774                                         client.sa_in.sin_addr.s_addr=htonl(0x7F000001);
775                                         }
776                                 else    goto err;
777                                 }
778                         cs=socket(client.sa.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
779                         if (cs != INVALID_SOCKET)
780                                 {
781                                 int ii;
782                                 ii=connect(cs,&client.sa,addrlen);
783                                 closesocket(cs);
784                                 if (ii == INVALID_SOCKET)
785                                         {
786                                         bind_mode=BIO_BIND_REUSEADDR;
787                                         closesocket(s);
788                                         goto again;
789                                         }
790                                 /* else error */
791                                 }
792                         /* else error */
793                         }
794 #endif
795                 SYSerr(SYS_F_BIND,err_num);
796                 ERR_add_error_data(3,"port='",host,"'");
797                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
798                 goto err;
799                 }
800         if (listen(s,MAX_LISTEN) == -1)
801                 {
802                 SYSerr(SYS_F_BIND,get_last_socket_error());
803                 ERR_add_error_data(3,"port='",host,"'");
804                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
805                 goto err;
806                 }
807         ret=1;
808 err:
809         if (str != NULL) OPENSSL_free(str);
810         if ((ret == 0) && (s != INVALID_SOCKET))
811                 {
812                 closesocket(s);
813                 s= INVALID_SOCKET;
814                 }
815         return(s);
816         }
817
818 int BIO_accept(int sock, char **addr)
819         {
820         int ret=INVALID_SOCKET;
821         unsigned long l;
822         unsigned short port;
823         char *p;
824
825         struct {
826         /*
827          * As for following union. Trouble is that there are platforms
828          * that have socklen_t and there are platforms that don't, on
829          * some platforms socklen_t is int and on some size_t. So what
830          * one can do? One can cook #ifdef spaghetti, which is nothing
831          * but masochistic. Or one can do union between int and size_t.
832          * One naturally does it primarily for 64-bit platforms where
833          * sizeof(int) != sizeof(size_t). But would it work? Note that
834          * if size_t member is initialized to 0, then later int member
835          * assignment naturally does the job on little-endian platforms
836          * regardless accept's expectations! What about big-endians?
837          * If accept expects int*, then it works, and if size_t*, then
838          * length value would appear as unreasonably large. But this
839          * won't prevent it from filling in the address structure. The
840          * trouble of course would be if accept returns more data than
841          * actual buffer can accomodate and overwrite stack... That's
842          * where early OPENSSL_assert comes into picture. Besides, the
843          * only 64-bit big-endian platform found so far that expects
844          * size_t* is HP-UX, where stack grows towards higher address.
845          * <appro>
846          */
847         union { size_t s; int i; } len;
848         union {
849                 struct sockaddr sa;
850                 struct sockaddr_in sa_in;
851 #if OPENSSL_USE_IPV6
852                 struct sockaddr_in6 sa_in6;
853 #endif
854                 } from;
855         } sa;
856
857         sa.len.s=0;
858         sa.len.i=sizeof(sa.from);
859         memset(&sa.from,0,sizeof(sa.from));
860         ret=accept(sock,&sa.from.sa,(void *)&sa.len);
861         if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0)
862                 {
863                 OPENSSL_assert(sa.len.s<=sizeof(sa.from));
864                 sa.len.i = (int)sa.len.s;
865                 /* use sa.len.i from this point */
866                 }
867         if (ret == INVALID_SOCKET)
868                 {
869                 if(BIO_sock_should_retry(ret)) return -2;
870                 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
871                 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
872                 goto end;
873                 }
874
875         if (addr == NULL) goto end;
876
877 #ifdef EAI_FAMILY
878         do {
879         char   h[NI_MAXHOST],s[NI_MAXSERV];
880         size_t nl;
881         static union {  void *p;
882                         int (WSAAPI *f)(const struct sockaddr *,size_t/*socklen_t*/,
883                                  char *,size_t,char *,size_t,int);
884                         } p_getnameinfo = {NULL};
885                         /* 2nd argument to getnameinfo is specified to
886                          * be socklen_t. Unfortunately there is a number
887                          * of environments where socklen_t is not defined.
888                          * As it's passed by value, it's safe to pass it
889                          * as size_t... <appro> */
890
891         if (p_getnameinfo.p==NULL)
892                 {
893                 if ((p_getnameinfo.p=DSO_global_lookup("getnameinfo"))==NULL)
894                         p_getnameinfo.p=(void*)-1;
895                 }
896         if (p_getnameinfo.p==(void *)-1) break;
897
898         if ((*p_getnameinfo.f)(&sa.from.sa,sa.len.i,h,sizeof(h),s,sizeof(s),
899             NI_NUMERICHOST|NI_NUMERICSERV)) break;
900         nl = strlen(h)+strlen(s)+2;
901         p = *addr;
902         if (p)  { *p = '\0'; p = OPENSSL_realloc(p,nl); }
903         else    { p = OPENSSL_malloc(nl);               }
904         if (p==NULL)
905                 {
906                 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
907                 goto end;
908                 }
909         *addr = p;
910         BIO_snprintf(*addr,nl,"%s:%s",h,s);
911         goto end;
912         } while(0);
913 #endif
914         if (sa.from.sa.sa_family != AF_INET) goto end;
915         l=ntohl(sa.from.sa_in.sin_addr.s_addr);
916         port=ntohs(sa.from.sa_in.sin_port);
917         if (*addr == NULL)
918                 {
919                 if ((p=OPENSSL_malloc(24)) == NULL)
920                         {
921                         BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
922                         goto end;
923                         }
924                 *addr=p;
925                 }
926         BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d",
927                      (unsigned char)(l>>24L)&0xff,
928                      (unsigned char)(l>>16L)&0xff,
929                      (unsigned char)(l>> 8L)&0xff,
930                      (unsigned char)(l     )&0xff,
931                      port);
932 end:
933         return(ret);
934         }
935
936 int BIO_set_tcp_ndelay(int s, int on)
937         {
938         int ret=0;
939 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
940         int opt;
941
942 #ifdef SOL_TCP
943         opt=SOL_TCP;
944 #else
945 #ifdef IPPROTO_TCP
946         opt=IPPROTO_TCP;
947 #endif
948 #endif
949         
950         ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
951 #endif
952         return(ret == 0);
953         }
954
955 int BIO_socket_nbio(int s, int mode)
956         {
957         int ret= -1;
958         int l;
959
960         l=mode;
961 #ifdef FIONBIO
962         ret=BIO_socket_ioctl(s,FIONBIO,&l);
963 #endif
964         return(ret == 0);
965         }
966 #endif