dcaef68ea7cf658677bc3120666a4dc25a439202
[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 #ifndef OPENSSL_NO_SOCK
60
61 #include <stdio.h>
62 #include <stdlib.h>
63 #include <errno.h>
64 #define USE_SOCKETS
65 #include "cryptlib.h"
66 #include <openssl/bio.h>
67
68 #ifdef OPENSSL_SYS_WIN16
69 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
70 #else
71 #define SOCKET_PROTOCOL IPPROTO_TCP
72 #endif
73
74 #ifdef SO_MAXCONN
75 #define MAX_LISTEN  SO_MAXCONN
76 #elif defined(SOMAXCONN)
77 #define MAX_LISTEN  SOMAXCONN
78 #else
79 #define MAX_LISTEN  32
80 #endif
81
82 #ifdef OPENSSL_SYS_WINDOWS
83 static int wsa_init_done=0;
84 #endif
85
86 static unsigned long BIO_ghbn_hits=0L;
87 static unsigned long BIO_ghbn_miss=0L;
88
89 #define GHBN_NUM        4
90 static struct ghbn_cache_st
91         {
92         char name[129];
93         struct hostent *ent;
94         unsigned long order;
95         } ghbn_cache[GHBN_NUM];
96
97 static int get_ip(const char *str,unsigned char *ip);
98 #if 0
99 static void ghbn_free(struct hostent *a);
100 static struct hostent *ghbn_dup(struct hostent *a);
101 #endif
102 int BIO_get_host_ip(const char *str, unsigned char *ip)
103         {
104         int i;
105         int err = 1;
106         int locked = 0;
107         struct hostent *he;
108
109         i=get_ip(str,ip);
110         if (i < 0)
111                 {
112                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
113                 goto err;
114                 }
115
116         /* At this point, we have something that is most probably correct
117            in some way, so let's init the socket. */
118         if (BIO_sock_init() != 1)
119                 return 0; /* don't generate another error code here */
120
121         /* If the string actually contained an IP address, we need not do
122            anything more */
123         if (i > 0) return(1);
124
125         /* do a gethostbyname */
126         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
127         locked = 1;
128         he=BIO_gethostbyname(str);
129         if (he == NULL)
130                 {
131                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
132                 goto err;
133                 }
134
135         /* cast to short because of win16 winsock definition */
136         if ((short)he->h_addrtype != AF_INET)
137                 {
138                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
139                 goto err;
140                 }
141         for (i=0; i<4; i++)
142                 ip[i]=he->h_addr_list[0][i];
143         err = 0;
144
145  err:
146         if (locked)
147                 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
148         if (err)
149                 {
150                 ERR_add_error_data(2,"host=",str);
151                 return 0;
152                 }
153         else
154                 return 1;
155         }
156
157 int BIO_get_port(const char *str, unsigned short *port_ptr)
158         {
159         int i;
160         struct servent *s;
161
162         if (str == NULL)
163                 {
164                 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
165                 return(0);
166                 }
167         i=atoi(str);
168         if (i != 0)
169                 *port_ptr=(unsigned short)i;
170         else
171                 {
172                 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
173                 /* Note: under VMS with SOCKETSHR, it seems like the first
174                  * parameter is 'char *', instead of 'const char *'
175                  */
176                 s=getservbyname(
177 #ifndef CONST_STRICT
178                     (char *)
179 #endif
180                     str,"tcp");
181                 if(s != NULL)
182                         *port_ptr=ntohs((unsigned short)s->s_port);
183                 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
184                 if(s == NULL)
185                         {
186                         if (strcmp(str,"http") == 0)
187                                 *port_ptr=80;
188                         else if (strcmp(str,"telnet") == 0)
189                                 *port_ptr=23;
190                         else if (strcmp(str,"socks") == 0)
191                                 *port_ptr=1080;
192                         else if (strcmp(str,"https") == 0)
193                                 *port_ptr=443;
194                         else if (strcmp(str,"ssl") == 0)
195                                 *port_ptr=443;
196                         else if (strcmp(str,"ftp") == 0)
197                                 *port_ptr=21;
198                         else if (strcmp(str,"gopher") == 0)
199                                 *port_ptr=70;
200 #if 0
201                         else if (strcmp(str,"wais") == 0)
202                                 *port_ptr=21;
203 #endif
204                         else
205                                 {
206                                 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
207                                 ERR_add_error_data(3,"service='",str,"'");
208                                 return(0);
209                                 }
210                         }
211                 }
212         return(1);
213         }
214
215 int BIO_sock_error(int sock)
216         {
217         int j,i;
218         int size;
219                  
220         size=sizeof(int);
221         /* Note: under Windows the third parameter is of type (char *)
222          * whereas under other systems it is (void *) if you don't have
223          * a cast it will choke the compiler: if you do have a cast then
224          * you can either go for (char *) or (void *).
225          */
226         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
227         if (i < 0)
228                 return(1);
229         else
230                 return(j);
231         }
232
233 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
234         {
235         int i;
236         char **p;
237
238         switch (cmd)
239                 {
240         case BIO_GHBN_CTRL_HITS:
241                 return(BIO_ghbn_hits);
242                 /* break; */
243         case BIO_GHBN_CTRL_MISSES:
244                 return(BIO_ghbn_miss);
245                 /* break; */
246         case BIO_GHBN_CTRL_CACHE_SIZE:
247                 return(GHBN_NUM);
248                 /* break; */
249         case BIO_GHBN_CTRL_GET_ENTRY:
250                 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
251                         (ghbn_cache[iarg].order > 0))
252                         {
253                         p=(char **)parg;
254                         if (p == NULL) return(0);
255                         *p=ghbn_cache[iarg].name;
256                         ghbn_cache[iarg].name[128]='\0';
257                         return(1);
258                         }
259                 return(0);
260                 /* break; */
261         case BIO_GHBN_CTRL_FLUSH:
262                 for (i=0; i<GHBN_NUM; i++)
263                         ghbn_cache[i].order=0;
264                 break;
265         default:
266                 return(0);
267                 }
268         return(1);
269         }
270
271 #if 0
272 static struct hostent *ghbn_dup(struct hostent *a)
273         {
274         struct hostent *ret;
275         int i,j;
276
277         MemCheck_off();
278         ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
279         if (ret == NULL) return(NULL);
280         memset(ret,0,sizeof(struct hostent));
281
282         for (i=0; a->h_aliases[i] != NULL; i++)
283                 ;
284         i++;
285         ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
286         if (ret->h_aliases == NULL)
287                 goto err;
288         memset(ret->h_aliases, 0, i*sizeof(char *));
289
290         for (i=0; a->h_addr_list[i] != NULL; i++)
291                 ;
292         i++;
293         ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
294         if (ret->h_addr_list == NULL)
295                 goto err;
296         memset(ret->h_addr_list, 0, i*sizeof(char *));
297
298         j=strlen(a->h_name)+1;
299         if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
300         memcpy((char *)ret->h_name,a->h_name,j);
301         for (i=0; a->h_aliases[i] != NULL; i++)
302                 {
303                 j=strlen(a->h_aliases[i])+1;
304                 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
305                 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
306                 }
307         ret->h_length=a->h_length;
308         ret->h_addrtype=a->h_addrtype;
309         for (i=0; a->h_addr_list[i] != NULL; i++)
310                 {
311                 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
312                         goto err;
313                 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
314                 }
315         if (0)
316                 {
317 err:    
318                 if (ret != NULL)
319                         ghbn_free(ret);
320                 ret=NULL;
321                 }
322         MemCheck_on();
323         return(ret);
324         }
325
326 static void ghbn_free(struct hostent *a)
327         {
328         int i;
329
330         if(a == NULL)
331             return;
332
333         if (a->h_aliases != NULL)
334                 {
335                 for (i=0; a->h_aliases[i] != NULL; i++)
336                         OPENSSL_free(a->h_aliases[i]);
337                 OPENSSL_free(a->h_aliases);
338                 }
339         if (a->h_addr_list != NULL)
340                 {
341                 for (i=0; a->h_addr_list[i] != NULL; i++)
342                         OPENSSL_free(a->h_addr_list[i]);
343                 OPENSSL_free(a->h_addr_list);
344                 }
345         if (a->h_name != NULL) OPENSSL_free(a->h_name);
346         OPENSSL_free(a);
347         }
348
349 #endif
350
351 struct hostent *BIO_gethostbyname(const char *name)
352         {
353 #if 1
354         /* Caching gethostbyname() results forever is wrong,
355          * so we have to let the true gethostbyname() worry about this */
356         return gethostbyname(name);
357 #else
358         struct hostent *ret;
359         int i,lowi=0,j;
360         unsigned long low= (unsigned long)-1;
361
362
363 #  if 0
364         /* It doesn't make sense to use locking here: The function interface
365          * is not thread-safe, because threads can never be sure when
366          * some other thread destroys the data they were given a pointer to.
367          */
368         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
369 #  endif
370         j=strlen(name);
371         if (j < 128)
372                 {
373                 for (i=0; i<GHBN_NUM; i++)
374                         {
375                         if (low > ghbn_cache[i].order)
376                                 {
377                                 low=ghbn_cache[i].order;
378                                 lowi=i;
379                                 }
380                         if (ghbn_cache[i].order > 0)
381                                 {
382                                 if (strncmp(name,ghbn_cache[i].name,128) == 0)
383                                         break;
384                                 }
385                         }
386                 }
387         else
388                 i=GHBN_NUM;
389
390         if (i == GHBN_NUM) /* no hit*/
391                 {
392                 BIO_ghbn_miss++;
393                 /* Note: under VMS with SOCKETSHR, it seems like the first
394                  * parameter is 'char *', instead of 'const char *'
395                  */
396                 ret=gethostbyname(
397 #  ifndef CONST_STRICT
398                     (char *)
399 #  endif
400                     name);
401
402                 if (ret == NULL)
403                         goto end;
404                 if (j > 128) /* too big to cache */
405                         {
406 #  if 0
407                         /* If we were trying to make this function thread-safe (which
408                          * is bound to fail), we'd have to give up in this case
409                          * (or allocate more memory). */
410                         ret = NULL;
411 #  endif
412                         goto end;
413                         }
414
415                 /* else add to cache */
416                 if (ghbn_cache[lowi].ent != NULL)
417                         ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
418                 ghbn_cache[lowi].name[0] = '\0';
419
420                 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
421                         {
422                         BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
423                         goto end;
424                         }
425                 strncpy(ghbn_cache[lowi].name,name,128);
426                 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
427                 }
428         else
429                 {
430                 BIO_ghbn_hits++;
431                 ret= ghbn_cache[i].ent;
432                 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
433                 }
434 end:
435 #  if 0
436         CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
437 #  endif
438         return(ret);
439 #endif
440         }
441
442
443 int BIO_sock_init(void)
444         {
445 #ifdef OPENSSL_SYS_WINDOWS
446         static struct WSAData wsa_state;
447
448         if (!wsa_init_done)
449                 {
450                 int err;
451           
452 #ifdef SIGINT
453                 signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
454 #endif
455                 wsa_init_done=1;
456                 memset(&wsa_state,0,sizeof(wsa_state));
457                 if (WSAStartup(0x0101,&wsa_state)!=0)
458                         {
459                         err=WSAGetLastError();
460                         SYSerr(SYS_F_WSASTARTUP,err);
461                         BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
462                         return(-1);
463                         }
464                 }
465 #endif /* OPENSSL_SYS_WINDOWS */
466         return(1);
467         }
468
469 void BIO_sock_cleanup(void)
470         {
471 #ifdef OPENSSL_SYS_WINDOWS
472         if (wsa_init_done)
473                 {
474                 wsa_init_done=0;
475                 WSACancelBlockingCall();
476                 WSACleanup();
477                 }
478 #endif
479         }
480
481 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
482
483 int BIO_socket_ioctl(int fd, long type, unsigned long *arg)
484         {
485         int i;
486
487         i=ioctlsocket(fd,type,arg);
488         if (i < 0)
489                 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
490         return(i);
491         }
492 #endif /* __VMS_VER */
493
494 /* The reason I have implemented this instead of using sscanf is because
495  * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
496 static int get_ip(const char *str, unsigned char ip[4])
497         {
498         unsigned int tmp[4];
499         int num=0,c,ok=0;
500
501         tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
502
503         for (;;)
504                 {
505                 c= *(str++);
506                 if ((c >= '0') && (c <= '9'))
507                         {
508                         ok=1;
509                         tmp[num]=tmp[num]*10+c-'0';
510                         if (tmp[num] > 255) return(0);
511                         }
512                 else if (c == '.')
513                         {
514                         if (!ok) return(-1);
515                         if (num == 3) return(0);
516                         num++;
517                         ok=0;
518                         }
519                 else if (c == '\0' && (num == 3) && ok)
520                         break;
521                 else
522                         return(0);
523                 }
524         ip[0]=tmp[0];
525         ip[1]=tmp[1];
526         ip[2]=tmp[2];
527         ip[3]=tmp[3];
528         return(1);
529         }
530
531 int BIO_get_accept_socket(char *host, int bind_mode)
532         {
533         int ret=0;
534         struct sockaddr_in server,client;
535         int s=INVALID_SOCKET,cs;
536         unsigned char ip[4];
537         unsigned short port;
538         char *str=NULL,*e;
539         const char *h,*p;
540         unsigned long l;
541         int err_num;
542
543         if (BIO_sock_init() != 1) return(INVALID_SOCKET);
544
545         if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
546
547         h=p=NULL;
548         h=str;
549         for (e=str; *e; e++)
550                 {
551                 if (*e == ':')
552                         {
553                         p= &(e[1]);
554                         *e='\0';
555                         }
556                 else if (*e == '/')
557                         {
558                         *e='\0';
559                         break;
560                         }
561                 }
562
563         if (p == NULL)
564                 {
565                 p=h;
566                 h="*";
567                 }
568
569         if (!BIO_get_port(p,&port)) goto err;
570
571         memset((char *)&server,0,sizeof(server));
572         server.sin_family=AF_INET;
573         server.sin_port=htons(port);
574
575         if (strcmp(h,"*") == 0)
576                 server.sin_addr.s_addr=INADDR_ANY;
577         else
578                 {
579                 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
580                 l=(unsigned long)
581                         ((unsigned long)ip[0]<<24L)|
582                         ((unsigned long)ip[1]<<16L)|
583                         ((unsigned long)ip[2]<< 8L)|
584                         ((unsigned long)ip[3]);
585                 server.sin_addr.s_addr=htonl(l);
586                 }
587
588 again:
589         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
590         if (s == INVALID_SOCKET)
591                 {
592                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
593                 ERR_add_error_data(3,"port='",host,"'");
594                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
595                 goto err;
596                 }
597
598 #ifdef SO_REUSEADDR
599         if (bind_mode == BIO_BIND_REUSEADDR)
600                 {
601                 int i=1;
602
603                 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
604                 bind_mode=BIO_BIND_NORMAL;
605                 }
606 #endif
607         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
608                 {
609 #ifdef SO_REUSEADDR
610                 err_num=get_last_socket_error();
611                 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
612                         (err_num == EADDRINUSE))
613                         {
614                         memcpy((char *)&client,(char *)&server,sizeof(server));
615                         if (strcmp(h,"*") == 0)
616                                 client.sin_addr.s_addr=htonl(0x7F000001);
617                         cs=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
618                         if (cs != INVALID_SOCKET)
619                                 {
620                                 int ii;
621                                 ii=connect(cs,(struct sockaddr *)&client,
622                                         sizeof(client));
623                                 closesocket(cs);
624                                 if (ii == INVALID_SOCKET)
625                                         {
626                                         bind_mode=BIO_BIND_REUSEADDR;
627                                         closesocket(s);
628                                         goto again;
629                                         }
630                                 /* else error */
631                                 }
632                         /* else error */
633                         }
634 #endif
635                 SYSerr(SYS_F_BIND,err_num);
636                 ERR_add_error_data(3,"port='",host,"'");
637                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
638                 goto err;
639                 }
640         if (listen(s,MAX_LISTEN) == -1)
641                 {
642                 SYSerr(SYS_F_BIND,get_last_socket_error());
643                 ERR_add_error_data(3,"port='",host,"'");
644                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
645                 goto err;
646                 }
647         ret=1;
648 err:
649         if (str != NULL) OPENSSL_free(str);
650         if ((ret == 0) && (s != INVALID_SOCKET))
651                 {
652                 closesocket(s);
653                 s= INVALID_SOCKET;
654                 }
655         return(s);
656         }
657
658 int BIO_accept(int sock, char **addr)
659         {
660         int ret=INVALID_SOCKET;
661         static struct sockaddr_in from;
662         unsigned long l;
663         unsigned short port;
664         int len;
665         char *p;
666
667         memset((char *)&from,0,sizeof(from));
668         len=sizeof(from);
669         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
670          * of type (int *) whereas under other systems it is (void *) if
671          * you don't have a cast it will choke the compiler: if you do
672          * have a cast then you can either go for (int *) or (void *).
673          */
674         ret=accept(sock,(struct sockaddr *)&from,(void *)&len);
675         if (ret == INVALID_SOCKET)
676                 {
677                 if(BIO_sock_should_retry(ret)) return -2;
678                 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
679                 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
680                 goto end;
681                 }
682
683         if (addr == NULL) goto end;
684
685         l=ntohl(from.sin_addr.s_addr);
686         port=ntohs(from.sin_port);
687         if (*addr == NULL)
688                 {
689                 if ((p=OPENSSL_malloc(24)) == NULL)
690                         {
691                         BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
692                         goto end;
693                         }
694                 *addr=p;
695                 }
696         sprintf(*addr,"%d.%d.%d.%d:%d",
697                 (unsigned char)(l>>24L)&0xff,
698                 (unsigned char)(l>>16L)&0xff,
699                 (unsigned char)(l>> 8L)&0xff,
700                 (unsigned char)(l     )&0xff,
701                 port);
702 end:
703         return(ret);
704         }
705
706 int BIO_set_tcp_ndelay(int s, int on)
707         {
708         int ret=0;
709 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
710         int opt;
711
712 #ifdef SOL_TCP
713         opt=SOL_TCP;
714 #else
715 #ifdef IPPROTO_TCP
716         opt=IPPROTO_TCP;
717 #endif
718 #endif
719         
720         ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
721 #endif
722         return(ret == 0);
723         }
724 #endif
725
726 int BIO_socket_nbio(int s, int mode)
727         {
728         int ret= -1;
729         unsigned long l;
730
731         l=mode;
732 #ifdef FIONBIO
733         ret=BIO_socket_ioctl(s,FIONBIO,&l);
734 #endif
735         return(ret == 0);
736         }