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