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 /*      BIOerr(BIO_F_WSASTARTUP,BIO_R_WSASTARTUP ); */
  69
  70 #ifdef WIN16
  71 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
  72 #else
  73 #define SOCKET_PROTOCOL IPPROTO_TCP
  74 #endif
  75
  76 #ifdef SO_MAXCONN
  77 #define MAX_LISTEN  SOMAXCONN
  78 #elif defined(SO_MAXCONN)
  79 #define MAX_LISTEN  SO_MAXCONN
  80 #else
  81 #define MAX_LISTEN  32
  82 #endif
  83
  84 #ifdef WINDOWS
  85 static int wsa_init_done=0;
  86 #endif
  87
  88 static unsigned long BIO_ghbn_hits=0L;
  89 static unsigned long BIO_ghbn_miss=0L;
  90
  91 #define GHBN_NUM        4
  92 static struct ghbn_cache_st
  93         {
  94         char name[129];
  95         struct hostent *ent;
  96         unsigned long order;
  97         } ghbn_cache[GHBN_NUM];
  98
  99 #ifndef NOPROTO
 100 static int get_ip(const char *str,unsigned char *ip);
 101 static void ghbn_free(struct hostent *a);
 102 static struct hostent *ghbn_dup(struct hostent *a);
 103 #else
 104 static int get_ip();
 105 static void ghbn_free();
 106 static struct hostent *ghbn_dup();
 107 #endif
 108
 109 int BIO_get_host_ip(const char *str, unsigned char *ip)
 110         {
 111         int i;
 112         struct hostent *he;
 113
 114         i=get_ip(str,ip);
 115         if (i > 0) return(1);
 116         if (i < 0)
 117                 {
 118                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
 119                 ERR_add_error_data(2,"host=",str);
 120                 return(0);
 121                 }
 122         else
 123                 { /* do a gethostbyname */
 124                 if (!BIO_sock_init()) return(0);
 125
 126                 he=BIO_gethostbyname(str);
 127                 if (he == NULL)
 128                         {
 129                         BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
 130                         ERR_add_error_data(2,"host=",str);
 131                         return(0);
 132                         }
 133
 134                 /* cast to short because of win16 winsock definition */
 135                 if ((short)he->h_addrtype != AF_INET)
 136                         {
 137                         BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
 138                         ERR_add_error_data(2,"host=",str);
 139                         return(0);
 140                         }
 141                 for (i=0; i<4; i++)
 142                         ip[i]=he->h_addr_list[0][i];
 143                 }
 144         return(1);
 145         }
 146
 147 int BIO_get_port(const char *str, unsigned short *port_ptr)
 148         {
 149         int i;
 150         struct servent *s;
 151
 152         if (str == NULL)
 153                 {
 154                 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
 155                 return(0);
 156                 }
 157         i=atoi(str);
 158         if (i != 0)
 159                 *port_ptr=(unsigned short)i;
 160         else
 161                 {
 162                 s=getservbyname(str,"tcp");
 163                 if (s == NULL)
 164                         {
 165                         if (strcmp(str,"http") == 0)
 166                                 *port_ptr=80;
 167                         else if (strcmp(str,"telnet") == 0)
 168                                 *port_ptr=23;
 169                         else if (strcmp(str,"socks") == 0)
 170                                 *port_ptr=1080;
 171                         else if (strcmp(str,"https") == 0)
 172                                 *port_ptr=443;
 173                         else if (strcmp(str,"ssl") == 0)
 174                                 *port_ptr=443;
 175                         else if (strcmp(str,"ftp") == 0)
 176                                 *port_ptr=21;
 177                         else if (strcmp(str,"gopher") == 0)
 178                                 *port_ptr=70;
 179 #if 0
 180                         else if (strcmp(str,"wais") == 0)
 181                                 *port_ptr=21;
 182 #endif
 183                         else
 184                                 {
 185                                 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
 186                                 ERR_add_error_data(3,"service='",str,"'");
 187                                 return(0);
 188                                 }
 189                         return(1);
 190                         }
 191                 *port_ptr=htons((unsigned short)s->s_port);
 192                 }
 193         return(1);
 194         }
 195
 196 int BIO_sock_error(int sock)
 197         {
 198         int j,i;
 199         int size;
 200
 201         size=sizeof(int);
 202         /* Note: under Windows the third parameter is of type (char *)
 203          * whereas under other systems it is (void *) if you don't have
 204          * a cast it will choke the compiler: if you do have a cast then
 205          * you can either go for (char *) or (void *).
 206          */
 207         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,&size);
 208         if (i < 0)
 209                 return(1);
 210         else
 211                 return(j);
 212         }
 213
 214 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
 215         {
 216         int i;
 217         char **p;
 218
 219         switch (cmd)
 220                 {
 221         case BIO_GHBN_CTRL_HITS:
 222                 return(BIO_ghbn_hits);
 223                 /* break; */
 224         case BIO_GHBN_CTRL_MISSES:
 225                 return(BIO_ghbn_miss);
 226                 /* break; */
 227         case BIO_GHBN_CTRL_CACHE_SIZE:
 228                 return(GHBN_NUM);
 229                 /* break; */
 230         case BIO_GHBN_CTRL_GET_ENTRY:
 231                 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
 232                         (ghbn_cache[iarg].order > 0))
 233                         {
 234                         p=(char **)parg;
 235                         if (p == NULL) return(0);
 236                         *p=ghbn_cache[iarg].name;
 237                         ghbn_cache[iarg].name[128]='\0';
 238                         return(1);
 239                         }
 240                 return(0);
 241                 /* break; */
 242         case BIO_GHBN_CTRL_FLUSH:
 243                 for (i=0; i<GHBN_NUM; i++)
 244                         ghbn_cache[i].order=0;
 245                 break;
 246         default:
 247                 return(0);
 248                 }
 249         return(1);
 250         }
 251
 252 static struct hostent *ghbn_dup(struct hostent *a)
 253         {
 254         struct hostent *ret;
 255         int i,j;
 256
 257         MemCheck_off();
 258         ret=(struct hostent *)Malloc(sizeof(struct hostent));
 259         if (ret == NULL) return(NULL);
 260         memset(ret,0,sizeof(struct hostent));
 261
 262         for (i=0; a->h_aliases[i] != NULL; i++)
 263                 ;
 264         i++;
 265         ret->h_aliases=(char **)Malloc(sizeof(char *)*i);
 266         memset(ret->h_aliases,0,sizeof(char *)*i);
 267         if (ret == NULL) goto err;
 268
 269         for (i=0; a->h_addr_list[i] != NULL; i++)
 270                 ;
 271         i++;
 272         ret->h_addr_list=(char **)Malloc(sizeof(char *)*i);
 273         memset(ret->h_addr_list,0,sizeof(char *)*i);
 274         if (ret->h_addr_list == NULL) goto err;
 275
 276         j=strlen(a->h_name)+1;
 277         if ((ret->h_name=Malloc(j)) == NULL) goto err;
 278         memcpy((char *)ret->h_name,a->h_name,j+1);
 279         for (i=0; a->h_aliases[i] != NULL; i++)
 280                 {
 281                 j=strlen(a->h_aliases[i])+1;
 282                 if ((ret->h_aliases[i]=Malloc(j)) == NULL) goto err;
 283                 memcpy(ret->h_aliases[i],a->h_aliases[i],j+1);
 284                 }
 285         ret->h_length=a->h_length;
 286         ret->h_addrtype=a->h_addrtype;
 287         for (i=0; a->h_addr_list[i] != NULL; i++)
 288                 {
 289                 if ((ret->h_addr_list[i]=Malloc(a->h_length)) == NULL)
 290                         goto err;
 291                 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
 292                 }
 293         if (0)
 294                 {
 295 err:
 296                 if (ret != NULL)
 297                         ghbn_free(ret);
 298                 ret=NULL;
 299                 }
 300         MemCheck_on();
 301         return(ret);
 302         }
 303
 304 static void ghbn_free(struct hostent *a)
 305         {
 306         int i;
 307
 308         if(a == NULL)
 309             return;
 310
 311         if (a->h_aliases != NULL)
 312                 {
 313                 for (i=0; a->h_aliases[i] != NULL; i++)
 314                         Free(a->h_aliases[i]);
 315                 Free(a->h_aliases);
 316                 }
 317         if (a->h_addr_list != NULL)
 318                 {
 319                 for (i=0; a->h_addr_list[i] != NULL; i++)
 320                         Free(a->h_addr_list[i]);
 321                 Free(a->h_addr_list);
 322                 }
 323         if (a->h_name != NULL) Free((char *)a->h_name);
 324         Free(a);
 325         }
 326
 327 struct hostent *BIO_gethostbyname(const char *name)
 328         {
 329         struct hostent *ret;
 330         int i,lowi=0,j;
 331         unsigned long low= (unsigned long)-1;
 332
 333 /*      return(gethostbyname(name)); */
 334
 335         CRYPTO_w_lock(CRYPTO_LOCK_BIO_GETHOSTBYNAME);
 336         j=strlen(name);
 337         if (j < 128)
 338                 {
 339                 for (i=0; i<GHBN_NUM; i++)
 340                         {
 341                         if (low > ghbn_cache[i].order)
 342                                 {
 343                                 low=ghbn_cache[i].order;
 344                                 lowi=i;
 345                                 }
 346                         if (ghbn_cache[i].order > 0)
 347                                 {
 348                                 if (strncmp(name,ghbn_cache[i].name,128) == 0)
 349                                         break;
 350                                 }
 351                         }
 352                 }
 353         else
 354                 i=GHBN_NUM;
 355
 356         if (i == GHBN_NUM) /* no hit*/
 357                 {
 358                 BIO_ghbn_miss++;
 359                 ret=gethostbyname(name);
 360
 361                 if (ret == NULL) return(NULL);
 362                 if (j > 128) return(ret); /* too big to cache */
 363
 364                 /* else add to cache */
 365                 if (ghbn_cache[lowi].ent != NULL)
 366                         ghbn_free(ghbn_cache[lowi].ent);
 367
 368                 strncpy(ghbn_cache[lowi].name,name,128);
 369                 ghbn_cache[lowi].ent=ghbn_dup(ret);
 370                 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
 371                 }
 372         else
 373                 {
 374                 BIO_ghbn_hits++;
 375                 ret= ghbn_cache[i].ent;
 376                 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
 377                 }
 378         CRYPTO_w_unlock(CRYPTO_LOCK_BIO_GETHOSTBYNAME);
 379         return(ret);
 380         }
 381
 382 int BIO_sock_init(void)
 383         {
 384 #ifdef WINDOWS
 385         static struct WSAData wsa_state;
 386
 387         if (!wsa_init_done)
 388                 {
 389                 int err;
 390
 391 #ifdef SIGINT
 392                 signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
 393 #endif
 394                 wsa_init_done=1;
 395                 memset(&wsa_state,0,sizeof(wsa_state));
 396                 if (WSAStartup(0x0101,&wsa_state)!=0)
 397                         {
 398                         err=WSAGetLastError();
 399                         SYSerr(SYS_F_WSASTARTUP,err);
 400                         BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
 401                         return(-1);
 402                         }
 403                 }
 404 #endif /* WINDOWS */
 405         return(1);
 406         }
 407
 408 void BIO_sock_cleanup(void)
 409         {
 410 #ifdef WINDOWS
 411         if (wsa_init_done)
 412                 {
 413                 wsa_init_done=0;
 414                 WSACancelBlockingCall();
 415                 WSACleanup();
 416                 }
 417 #endif
 418         }
 419
 420 int BIO_socket_ioctl(int fd, long type, unsigned long *arg)
 421         {
 422         int i;
 423
 424         i=ioctlsocket(fd,type,arg);
 425         if (i < 0)
 426                 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
 427         return(i);
 428         }
 429
 430 /* The reason I have implemented this instead of using sscanf is because
 431  * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
 432 static int get_ip(const char *str, unsigned char ip[4])
 433         {
 434         unsigned int tmp[4];
 435         int num=0,c,ok=0;
 436
 437         tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
 438
 439         for (;;)
 440                 {
 441                 c= *(str++);
 442                 if ((c >= '0') && (c <= '9'))
 443                         {
 444                         ok=1;
 445                         tmp[num]=tmp[num]*10+c-'0';
 446                         if (tmp[num] > 255) return(-1);
 447                         }
 448                 else if (c == '.')
 449                         {
 450                         if (!ok) return(-1);
 451                         if (num == 3) break;
 452                         num++;
 453                         ok=0;
 454                         }
 455                 else if ((num == 3) && ok)
 456                         break;
 457                 else
 458                         return(0);
 459                 }
 460         ip[0]=tmp[0];
 461         ip[1]=tmp[1];
 462         ip[2]=tmp[2];
 463         ip[3]=tmp[3];
 464         return(1);
 465         }
 466
 467 int BIO_get_accept_socket(char *host, int bind_mode)
 468         {
 469         int ret=0;
 470         struct sockaddr_in server,client;
 471         int s= -1,cs;
 472         unsigned char ip[4];
 473         unsigned short port;
 474         char *str,*e;
 475         const char *h,*p;
 476         unsigned long l;
 477         int err_num;
 478
 479         if (!BIO_sock_init()) return(INVALID_SOCKET);
 480
 481         if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
 482
 483         h=p=NULL;
 484         h=str;
 485         for (e=str; *e; e++)
 486                 {
 487                 if (*e == ':')
 488                         {
 489                         p= &(e[1]);
 490                         *e='\0';
 491                         }
 492                 else if (*e == '/')
 493                         {
 494                         *e='\0';
 495                         break;
 496                         }
 497                 }
 498
 499         if (p == NULL)
 500                 {
 501                 p=h;
 502                 h="*";
 503                 }
 504
 505         if (!BIO_get_port(p,&port)) return(INVALID_SOCKET);
 506
 507         memset((char *)&server,0,sizeof(server));
 508         server.sin_family=AF_INET;
 509         server.sin_port=htons(port);
 510
 511         if (strcmp(h,"*") == 0)
 512                 server.sin_addr.s_addr=INADDR_ANY;
 513         else
 514                 {
 515                 if (!BIO_get_host_ip(h,&(ip[0]))) return(INVALID_SOCKET);
 516                 l=(unsigned long)
 517                         ((unsigned long)ip[0]<<24L)|
 518                         ((unsigned long)ip[1]<<16L)|
 519                         ((unsigned long)ip[2]<< 8L)|
 520                         ((unsigned long)ip[3]);
 521                 server.sin_addr.s_addr=htonl(l);
 522                 }
 523
 524 again:
 525         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 526         if (s == INVALID_SOCKET)
 527                 {
 528                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
 529                 ERR_add_error_data(3,"port='",host,"'");
 530                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
 531                 goto err;
 532                 }
 533
 534 #ifdef SO_REUSEADDR
 535         if (bind_mode == BIO_BIND_REUSEADDR)
 536                 {
 537                 int i=1;
 538
 539                 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
 540                 bind_mode=BIO_BIND_NORMAL;
 541                 }
 542 #endif
 543         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 544                 {
 545 #ifdef SO_REUSEADDR
 546                 err_num=get_last_socket_error();
 547                 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
 548                         (err_num == EADDRINUSE))
 549                         {
 550                         memcpy((char *)&client,(char *)&server,sizeof(server));
 551                         if (strcmp(h,"*") == 0)
 552                                 client.sin_addr.s_addr=htonl(0x7F000001);
 553                         cs=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 554                         if (cs != INVALID_SOCKET)
 555                                 {
 556                                 int ii;
 557                                 ii=connect(cs,(struct sockaddr *)&client,
 558                                         sizeof(client));
 559                                 closesocket(cs);
 560                                 if (ii == INVALID_SOCKET)
 561                                         {
 562                                         bind_mode=BIO_BIND_REUSEADDR;
 563                                         closesocket(s);
 564                                         goto again;
 565                                         }
 566                                 /* else error */
 567                                 }
 568                         /* else error */
 569                         }
 570 #endif
 571                 SYSerr(SYS_F_BIND,err_num);
 572                 ERR_add_error_data(3,"port='",host,"'");
 573                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
 574                 goto err;
 575                 }
 576         if (listen(s,MAX_LISTEN) == -1)
 577                 {
 578                 SYSerr(SYS_F_BIND,get_last_socket_error());
 579                 ERR_add_error_data(3,"port='",host,"'");
 580                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
 581                 goto err;
 582                 }
 583         ret=1;
 584 err:
 585         if (str != NULL) Free(str);
 586         if ((ret == 0) && (s != INVALID_SOCKET))
 587                 {
 588                 closesocket(s);
 589                 s= INVALID_SOCKET;
 590                 }
 591         return(s);
 592         }
 593
 594 int BIO_accept(int sock, char **addr)
 595         {
 596         int ret=INVALID_SOCKET;
 597         static struct sockaddr_in from;
 598         unsigned long l;
 599         unsigned short port;
 600         int len;
 601         char *p;
 602
 603         memset((char *)&from,0,sizeof(from));
 604         len=sizeof(from);
 605         ret=accept(sock,(struct sockaddr *)&from,&len);
 606         if (ret == INVALID_SOCKET)
 607                 {
 608                 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
 609                 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
 610                 goto end;
 611                 }
 612
 613         if (addr == NULL) goto end;
 614
 615         l=ntohl(from.sin_addr.s_addr);
 616         port=ntohs(from.sin_port);
 617         if (*addr == NULL)
 618                 {
 619                 if ((p=Malloc(24)) == NULL)
 620                         {
 621                         BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
 622                         goto end;
 623                         }
 624                 *addr=p;
 625                 }
 626         sprintf(*addr,"%d.%d.%d.%d:%d",
 627                 (unsigned char)(l>>24L)&0xff,
 628                 (unsigned char)(l>>16L)&0xff,
 629                 (unsigned char)(l>> 8L)&0xff,
 630                 (unsigned char)(l     )&0xff,
 631                 port);
 632 end:
 633         return(ret);
 634         }
 635
 636 int BIO_set_tcp_ndelay(int s, int on)
 637         {
 638         int ret=0;
 639 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
 640         int opt;
 641
 642 #ifdef SOL_TCP
 643         opt=SOL_TCP;
 644 #else
 645 #ifdef IPPROTO_TCP
 646         opt=IPPROTO_TCP;
 647 #endif
 648 #endif
 649
 650         ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
 651 #endif
 652         return(ret == 0);
 653         }
 654 #endif
 655
 656 int BIO_socket_nbio(int s, int mode)
 657         {
 658         int ret= -1;
 659         unsigned long l;
 660
 661         l=mode;
 662 #ifdef FIONBIO
 663         ret=BIO_socket_ioctl(s,FIONBIO,&l);
 664 #endif
 665         return(ret == 0);
 666         }