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