4b3860b991e30a68694770a86b3fedc99b028b39
[dragonfly.git] / crypto / openssl-0.9 / 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 #endif
68
69 #ifndef OPENSSL_NO_SOCK
70
71 #ifdef OPENSSL_SYS_WIN16
72 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
73 #else
74 #define SOCKET_PROTOCOL IPPROTO_TCP
75 #endif
76
77 #ifdef SO_MAXCONN
78 #define MAX_LISTEN  SO_MAXCONN
79 #elif defined(SOMAXCONN)
80 #define MAX_LISTEN  SOMAXCONN
81 #else
82 #define MAX_LISTEN  32
83 #endif
84
85 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
86 static int wsa_init_done=0;
87 #endif
88
89 #if 0
90 static unsigned long BIO_ghbn_hits=0L;
91 static unsigned long BIO_ghbn_miss=0L;
92
93 #define GHBN_NUM        4
94 static struct ghbn_cache_st
95         {
96         char name[129];
97         struct hostent *ent;
98         unsigned long order;
99         } ghbn_cache[GHBN_NUM];
100 #endif
101
102 static int get_ip(const char *str,unsigned char *ip);
103 #if 0
104 static void ghbn_free(struct hostent *a);
105 static struct hostent *ghbn_dup(struct hostent *a);
106 #endif
107 int BIO_get_host_ip(const char *str, unsigned char *ip)
108         {
109         int i;
110         int err = 1;
111         int locked = 0;
112         struct hostent *he;
113
114         i=get_ip(str,ip);
115         if (i < 0)
116                 {
117                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
118                 goto err;
119                 }
120
121         /* At this point, we have something that is most probably correct
122            in some way, so let's init the socket. */
123         if (BIO_sock_init() != 1)
124                 return 0; /* don't generate another error code here */
125
126         /* If the string actually contained an IP address, we need not do
127            anything more */
128         if (i > 0) return(1);
129
130         /* do a gethostbyname */
131         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
132         locked = 1;
133         he=BIO_gethostbyname(str);
134         if (he == NULL)
135                 {
136                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
137                 goto err;
138                 }
139
140         /* cast to short because of win16 winsock definition */
141         if ((short)he->h_addrtype != AF_INET)
142                 {
143                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
144                 goto err;
145                 }
146         for (i=0; i<4; i++)
147                 ip[i]=he->h_addr_list[0][i];
148         err = 0;
149
150  err:
151         if (locked)
152                 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
153         if (err)
154                 {
155                 ERR_add_error_data(2,"host=",str);
156                 return 0;
157                 }
158         else
159                 return 1;
160         }
161
162 int BIO_get_port(const char *str, unsigned short *port_ptr)
163         {
164         int i;
165         struct servent *s;
166
167         if (str == NULL)
168                 {
169                 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
170                 return(0);
171                 }
172         i=atoi(str);
173         if (i != 0)
174                 *port_ptr=(unsigned short)i;
175         else
176                 {
177                 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
178                 /* Note: under VMS with SOCKETSHR, it seems like the first
179                  * parameter is 'char *', instead of 'const char *'
180                  */
181                 s=getservbyname(
182 #ifndef CONST_STRICT
183                     (char *)
184 #endif
185                     str,"tcp");
186                 if(s != NULL)
187                         *port_ptr=ntohs((unsigned short)s->s_port);
188                 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
189                 if(s == NULL)
190                         {
191                         if (strcmp(str,"http") == 0)
192                                 *port_ptr=80;
193                         else if (strcmp(str,"telnet") == 0)
194                                 *port_ptr=23;
195                         else if (strcmp(str,"socks") == 0)
196                                 *port_ptr=1080;
197                         else if (strcmp(str,"https") == 0)
198                                 *port_ptr=443;
199                         else if (strcmp(str,"ssl") == 0)
200                                 *port_ptr=443;
201                         else if (strcmp(str,"ftp") == 0)
202                                 *port_ptr=21;
203                         else if (strcmp(str,"gopher") == 0)
204                                 *port_ptr=70;
205 #if 0
206                         else if (strcmp(str,"wais") == 0)
207                                 *port_ptr=21;
208 #endif
209                         else
210                                 {
211                                 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
212                                 ERR_add_error_data(3,"service='",str,"'");
213                                 return(0);
214                                 }
215                         }
216                 }
217         return(1);
218         }
219
220 int BIO_sock_error(int sock)
221         {
222         int j,i;
223         int size;
224                  
225         size=sizeof(int);
226         /* Note: under Windows the third parameter is of type (char *)
227          * whereas under other systems it is (void *) if you don't have
228          * a cast it will choke the compiler: if you do have a cast then
229          * you can either go for (char *) or (void *).
230          */
231         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
232         if (i < 0)
233                 return(1);
234         else
235                 return(j);
236         }
237
238 #if 0
239 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
240         {
241         int i;
242         char **p;
243
244         switch (cmd)
245                 {
246         case BIO_GHBN_CTRL_HITS:
247                 return(BIO_ghbn_hits);
248                 /* break; */
249         case BIO_GHBN_CTRL_MISSES:
250                 return(BIO_ghbn_miss);
251                 /* break; */
252         case BIO_GHBN_CTRL_CACHE_SIZE:
253                 return(GHBN_NUM);
254                 /* break; */
255         case BIO_GHBN_CTRL_GET_ENTRY:
256                 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
257                         (ghbn_cache[iarg].order > 0))
258                         {
259                         p=(char **)parg;
260                         if (p == NULL) return(0);
261                         *p=ghbn_cache[iarg].name;
262                         ghbn_cache[iarg].name[128]='\0';
263                         return(1);
264                         }
265                 return(0);
266                 /* break; */
267         case BIO_GHBN_CTRL_FLUSH:
268                 for (i=0; i<GHBN_NUM; i++)
269                         ghbn_cache[i].order=0;
270                 break;
271         default:
272                 return(0);
273                 }
274         return(1);
275         }
276 #endif
277
278 #if 0
279 static struct hostent *ghbn_dup(struct hostent *a)
280         {
281         struct hostent *ret;
282         int i,j;
283
284         MemCheck_off();
285         ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
286         if (ret == NULL) return(NULL);
287         memset(ret,0,sizeof(struct hostent));
288
289         for (i=0; a->h_aliases[i] != NULL; i++)
290                 ;
291         i++;
292         ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
293         if (ret->h_aliases == NULL)
294                 goto err;
295         memset(ret->h_aliases, 0, i*sizeof(char *));
296
297         for (i=0; a->h_addr_list[i] != NULL; i++)
298                 ;
299         i++;
300         ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
301         if (ret->h_addr_list == NULL)
302                 goto err;
303         memset(ret->h_addr_list, 0, i*sizeof(char *));
304
305         j=strlen(a->h_name)+1;
306         if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
307         memcpy((char *)ret->h_name,a->h_name,j);
308         for (i=0; a->h_aliases[i] != NULL; i++)
309                 {
310                 j=strlen(a->h_aliases[i])+1;
311                 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
312                 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
313                 }
314         ret->h_length=a->h_length;
315         ret->h_addrtype=a->h_addrtype;
316         for (i=0; a->h_addr_list[i] != NULL; i++)
317                 {
318                 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
319                         goto err;
320                 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
321                 }
322         if (0)
323                 {
324 err:    
325                 if (ret != NULL)
326                         ghbn_free(ret);
327                 ret=NULL;
328                 }
329         MemCheck_on();
330         return(ret);
331         }
332
333 static void ghbn_free(struct hostent *a)
334         {
335         int i;
336
337         if(a == NULL)
338             return;
339
340         if (a->h_aliases != NULL)
341                 {
342                 for (i=0; a->h_aliases[i] != NULL; i++)
343                         OPENSSL_free(a->h_aliases[i]);
344                 OPENSSL_free(a->h_aliases);
345                 }
346         if (a->h_addr_list != NULL)
347                 {
348                 for (i=0; a->h_addr_list[i] != NULL; i++)
349                         OPENSSL_free(a->h_addr_list[i]);
350                 OPENSSL_free(a->h_addr_list);
351                 }
352         if (a->h_name != NULL) OPENSSL_free(a->h_name);
353         OPENSSL_free(a);
354         }
355
356 #endif
357
358 struct hostent *BIO_gethostbyname(const char *name)
359         {
360 #if 1
361         /* Caching gethostbyname() results forever is wrong,
362          * so we have to let the true gethostbyname() worry about this */
363         return gethostbyname(name);
364 #else
365         struct hostent *ret;
366         int i,lowi=0,j;
367         unsigned long low= (unsigned long)-1;
368
369
370 #  if 0
371         /* It doesn't make sense to use locking here: The function interface
372          * is not thread-safe, because threads can never be sure when
373          * some other thread destroys the data they were given a pointer to.
374          */
375         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
376 #  endif
377         j=strlen(name);
378         if (j < 128)
379                 {
380                 for (i=0; i<GHBN_NUM; i++)
381                         {
382                         if (low > ghbn_cache[i].order)
383                                 {
384                                 low=ghbn_cache[i].order;
385                                 lowi=i;
386                                 }
387                         if (ghbn_cache[i].order > 0)
388                                 {
389                                 if (strncmp(name,ghbn_cache[i].name,128) == 0)
390                                         break;
391                                 }
392                         }
393                 }
394         else
395                 i=GHBN_NUM;
396
397         if (i == GHBN_NUM) /* no hit*/
398                 {
399                 BIO_ghbn_miss++;
400                 /* Note: under VMS with SOCKETSHR, it seems like the first
401                  * parameter is 'char *', instead of 'const char *'
402                  */
403                 ret=gethostbyname(
404 #  ifndef CONST_STRICT
405                     (char *)
406 #  endif
407                     name);
408
409                 if (ret == NULL)
410                         goto end;
411                 if (j > 128) /* too big to cache */
412                         {
413 #  if 0
414                         /* If we were trying to make this function thread-safe (which
415                          * is bound to fail), we'd have to give up in this case
416                          * (or allocate more memory). */
417                         ret = NULL;
418 #  endif
419                         goto end;
420                         }
421
422                 /* else add to cache */
423                 if (ghbn_cache[lowi].ent != NULL)
424                         ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
425                 ghbn_cache[lowi].name[0] = '\0';
426
427                 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
428                         {
429                         BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
430                         goto end;
431                         }
432                 strncpy(ghbn_cache[lowi].name,name,128);
433                 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
434                 }
435         else
436                 {
437                 BIO_ghbn_hits++;
438                 ret= ghbn_cache[i].ent;
439                 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
440                 }
441 end:
442 #  if 0
443         CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
444 #  endif
445         return(ret);
446 #endif
447         }
448
449
450 int BIO_sock_init(void)
451         {
452 #ifdef OPENSSL_SYS_WINDOWS
453         static struct WSAData wsa_state;
454
455         if (!wsa_init_done)
456                 {
457                 int err;
458           
459 #ifdef SIGINT
460                 signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
461 #endif
462                 wsa_init_done=1;
463                 memset(&wsa_state,0,sizeof(wsa_state));
464                 if (WSAStartup(0x0101,&wsa_state)!=0)
465                         {
466                         err=WSAGetLastError();
467                         SYSerr(SYS_F_WSASTARTUP,err);
468                         BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
469                         return(-1);
470                         }
471                 }
472 #endif /* OPENSSL_SYS_WINDOWS */
473 #ifdef WATT32
474         extern int _watt_do_exit;
475         _watt_do_exit = 0;    /* don't make sock_init() call exit() */
476         if (sock_init())
477                 return (-1);
478 #endif
479
480 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
481     WORD wVerReq;
482     WSADATA wsaData;
483     int err;
484
485     if (!wsa_init_done)
486     {
487    
488 # ifdef SIGINT
489         signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
490 # endif
491
492         wsa_init_done=1;
493         wVerReq = MAKEWORD( 2, 0 );
494         err = WSAStartup(wVerReq,&wsaData);
495         if (err != 0)
496         {
497             SYSerr(SYS_F_WSASTARTUP,err);
498             BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
499             return(-1);
500                         }
501                 }
502 #endif
503
504         return(1);
505         }
506
507 void BIO_sock_cleanup(void)
508         {
509 #ifdef OPENSSL_SYS_WINDOWS
510         if (wsa_init_done)
511                 {
512                 wsa_init_done=0;
513 #ifndef OPENSSL_SYS_WINCE
514                 WSACancelBlockingCall();
515 #endif
516                 WSACleanup();
517                 }
518 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
519    if (wsa_init_done)
520         {
521         wsa_init_done=0;
522         WSACleanup();
523                 }
524 #endif
525         }
526
527 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
528
529 int BIO_socket_ioctl(int fd, long type, void *arg)
530         {
531         int i;
532
533 #ifdef __DJGPP__
534         i=ioctlsocket(fd,type,(char *)arg);
535 #else
536         i=ioctlsocket(fd,type,arg);
537 #endif /* __DJGPP__ */
538         if (i < 0)
539                 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
540         return(i);
541         }
542 #endif /* __VMS_VER */
543
544 /* The reason I have implemented this instead of using sscanf is because
545  * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
546 static int get_ip(const char *str, unsigned char ip[4])
547         {
548         unsigned int tmp[4];
549         int num=0,c,ok=0;
550
551         tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
552
553         for (;;)
554                 {
555                 c= *(str++);
556                 if ((c >= '0') && (c <= '9'))
557                         {
558                         ok=1;
559                         tmp[num]=tmp[num]*10+c-'0';
560                         if (tmp[num] > 255) return(0);
561                         }
562                 else if (c == '.')
563                         {
564                         if (!ok) return(-1);
565                         if (num == 3) return(0);
566                         num++;
567                         ok=0;
568                         }
569                 else if (c == '\0' && (num == 3) && ok)
570                         break;
571                 else
572                         return(0);
573                 }
574         ip[0]=tmp[0];
575         ip[1]=tmp[1];
576         ip[2]=tmp[2];
577         ip[3]=tmp[3];
578         return(1);
579         }
580
581 int BIO_get_accept_socket(char *host, int bind_mode)
582         {
583         int ret=0;
584         struct sockaddr_in server,client;
585         int s=INVALID_SOCKET,cs;
586         unsigned char ip[4];
587         unsigned short port;
588         char *str=NULL,*e;
589         const char *h,*p;
590         unsigned long l;
591         int err_num;
592
593         if (BIO_sock_init() != 1) return(INVALID_SOCKET);
594
595         if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
596
597         h=p=NULL;
598         h=str;
599         for (e=str; *e; e++)
600                 {
601                 if (*e == ':')
602                         {
603                         p= &(e[1]);
604                         *e='\0';
605                         }
606                 else if (*e == '/')
607                         {
608                         *e='\0';
609                         break;
610                         }
611                 }
612
613         if (p == NULL)
614                 {
615                 p=h;
616                 h="*";
617                 }
618
619         if (!BIO_get_port(p,&port)) goto err;
620
621         memset((char *)&server,0,sizeof(server));
622         server.sin_family=AF_INET;
623         server.sin_port=htons(port);
624
625         if (strcmp(h,"*") == 0)
626                 server.sin_addr.s_addr=INADDR_ANY;
627         else
628                 {
629                 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
630                 l=(unsigned long)
631                         ((unsigned long)ip[0]<<24L)|
632                         ((unsigned long)ip[1]<<16L)|
633                         ((unsigned long)ip[2]<< 8L)|
634                         ((unsigned long)ip[3]);
635                 server.sin_addr.s_addr=htonl(l);
636                 }
637
638 again:
639         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
640         if (s == INVALID_SOCKET)
641                 {
642                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
643                 ERR_add_error_data(3,"port='",host,"'");
644                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
645                 goto err;
646                 }
647
648 #ifdef SO_REUSEADDR
649         if (bind_mode == BIO_BIND_REUSEADDR)
650                 {
651                 int i=1;
652
653                 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
654                 bind_mode=BIO_BIND_NORMAL;
655                 }
656 #endif
657         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
658                 {
659 #ifdef SO_REUSEADDR
660                 err_num=get_last_socket_error();
661                 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
662                         (err_num == EADDRINUSE))
663                         {
664                         memcpy((char *)&client,(char *)&server,sizeof(server));
665                         if (strcmp(h,"*") == 0)
666                                 client.sin_addr.s_addr=htonl(0x7F000001);
667                         cs=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
668                         if (cs != INVALID_SOCKET)
669                                 {
670                                 int ii;
671                                 ii=connect(cs,(struct sockaddr *)&client,
672                                         sizeof(client));
673                                 closesocket(cs);
674                                 if (ii == INVALID_SOCKET)
675                                         {
676                                         bind_mode=BIO_BIND_REUSEADDR;
677                                         closesocket(s);
678                                         goto again;
679                                         }
680                                 /* else error */
681                                 }
682                         /* else error */
683                         }
684 #endif
685                 SYSerr(SYS_F_BIND,err_num);
686                 ERR_add_error_data(3,"port='",host,"'");
687                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
688                 goto err;
689                 }
690         if (listen(s,MAX_LISTEN) == -1)
691                 {
692                 SYSerr(SYS_F_BIND,get_last_socket_error());
693                 ERR_add_error_data(3,"port='",host,"'");
694                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
695                 goto err;
696                 }
697         ret=1;
698 err:
699         if (str != NULL) OPENSSL_free(str);
700         if ((ret == 0) && (s != INVALID_SOCKET))
701                 {
702                 closesocket(s);
703                 s= INVALID_SOCKET;
704                 }
705         return(s);
706         }
707
708 int BIO_accept(int sock, char **addr)
709         {
710         int ret=INVALID_SOCKET;
711         static struct sockaddr_in from;
712         unsigned long l;
713         unsigned short port;
714         int len;
715         char *p;
716
717         memset((char *)&from,0,sizeof(from));
718         len=sizeof(from);
719         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
720          * of type (int *) whereas under other systems it is (void *) if
721          * you don't have a cast it will choke the compiler: if you do
722          * have a cast then you can either go for (int *) or (void *).
723          */
724         ret=accept(sock,(struct sockaddr *)&from,(void *)&len);
725         if (ret == INVALID_SOCKET)
726                 {
727                 if(BIO_sock_should_retry(ret)) return -2;
728                 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
729                 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
730                 goto end;
731                 }
732
733         if (addr == NULL) goto end;
734
735         l=ntohl(from.sin_addr.s_addr);
736         port=ntohs(from.sin_port);
737         if (*addr == NULL)
738                 {
739                 if ((p=OPENSSL_malloc(24)) == NULL)
740                         {
741                         BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
742                         goto end;
743                         }
744                 *addr=p;
745                 }
746         BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d",
747                      (unsigned char)(l>>24L)&0xff,
748                      (unsigned char)(l>>16L)&0xff,
749                      (unsigned char)(l>> 8L)&0xff,
750                      (unsigned char)(l     )&0xff,
751                      port);
752 end:
753         return(ret);
754         }
755
756 int BIO_set_tcp_ndelay(int s, int on)
757         {
758         int ret=0;
759 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
760         int opt;
761
762 #ifdef SOL_TCP
763         opt=SOL_TCP;
764 #else
765 #ifdef IPPROTO_TCP
766         opt=IPPROTO_TCP;
767 #endif
768 #endif
769         
770         ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
771 #endif
772         return(ret == 0);
773         }
774 #endif
775
776 int BIO_socket_nbio(int s, int mode)
777         {
778         int ret= -1;
779         int l;
780
781         l=mode;
782 #ifdef FIONBIO
783         ret=BIO_socket_ioctl(s,FIONBIO,&l);
784 #endif
785         return(ret == 0);
786         }