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