crypto/bio/b_sock.c

   1 /* crypto/bio/b_sock.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #ifndef OPENSSL_NO_SOCK
  60
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <errno.h>
  64 #define USE_SOCKETS
  65 #include "cryptlib.h"
  66 #include <openssl/bio.h>
  67
  68 #ifdef OPENSSL_SYS_WIN16
  69 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
  70 #else
  71 #define SOCKET_PROTOCOL IPPROTO_TCP
  72 #endif
  73
  74 #ifdef SO_MAXCONN
  75 #define MAX_LISTEN  SO_MAXCONN
  76 #elif defined(SOMAXCONN)
  77 #define MAX_LISTEN  SOMAXCONN
  78 #else
  79 #define MAX_LISTEN  32
  80 #endif
  81
  82 #ifdef OPENSSL_SYS_WINDOWS
  83 static int wsa_init_done=0;
  84 #endif
  85
  86 #if 0
  87 static unsigned long BIO_ghbn_hits=0L;
  88 static unsigned long BIO_ghbn_miss=0L;
  89
  90 #define GHBN_NUM        4
  91 static struct ghbn_cache_st
  92         {
  93         char name[129];
  94         struct hostent *ent;
  95         unsigned long order;
  96         } ghbn_cache[GHBN_NUM];
  97 #endif
  98
  99 static int get_ip(const char *str,unsigned char *ip);
 100 #if 0
 101 static void ghbn_free(struct hostent *a);
 102 static struct hostent *ghbn_dup(struct hostent *a);
 103 #endif
 104 int BIO_get_host_ip(const char *str, unsigned char *ip)
 105         {
 106         int i;
 107         int err = 1;
 108         int locked = 0;
 109         struct hostent *he;
 110
 111         i=get_ip(str,ip);
 112         if (i < 0)
 113                 {
 114                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
 115                 goto err;
 116                 }
 117
 118         /* At this point, we have something that is most probably correct
 119            in some way, so let's init the socket. */
 120         if (BIO_sock_init() != 1)
 121                 return 0; /* don't generate another error code here */
 122
 123         /* If the string actually contained an IP address, we need not do
 124            anything more */
 125         if (i > 0) return(1);
 126
 127         /* do a gethostbyname */
 128         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
 129         locked = 1;
 130         he=BIO_gethostbyname(str);
 131         if (he == NULL)
 132                 {
 133                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
 134                 goto err;
 135                 }
 136
 137         /* cast to short because of win16 winsock definition */
 138         if ((short)he->h_addrtype != AF_INET)
 139                 {
 140                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
 141                 goto err;
 142                 }
 143         for (i=0; i<4; i++)
 144                 ip[i]=he->h_addr_list[0][i];
 145         err = 0;
 146
 147  err:
 148         if (locked)
 149                 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
 150         if (err)
 151                 {
 152                 ERR_add_error_data(2,"host=",str);
 153                 return 0;
 154                 }
 155         else
 156                 return 1;
 157         }
 158
 159 int BIO_get_port(const char *str, unsigned short *port_ptr)
 160         {
 161         int i;
 162         struct servent *s;
 163
 164         if (str == NULL)
 165                 {
 166                 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
 167                 return(0);
 168                 }
 169         i=atoi(str);
 170         if (i != 0)
 171                 *port_ptr=(unsigned short)i;
 172         else
 173                 {
 174                 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
 175                 /* Note: under VMS with SOCKETSHR, it seems like the first
 176                  * parameter is 'char *', instead of 'const char *'
 177                  */
 178                 s=getservbyname(
 179 #ifndef CONST_STRICT
 180                     (char *)
 181 #endif
 182                     str,"tcp");
 183                 if(s != NULL)
 184                         *port_ptr=ntohs((unsigned short)s->s_port);
 185                 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
 186                 if(s == NULL)
 187                         {
 188                         if (strcmp(str,"http") == 0)
 189                                 *port_ptr=80;
 190                         else if (strcmp(str,"telnet") == 0)
 191                                 *port_ptr=23;
 192                         else if (strcmp(str,"socks") == 0)
 193                                 *port_ptr=1080;
 194                         else if (strcmp(str,"https") == 0)
 195                                 *port_ptr=443;
 196                         else if (strcmp(str,"ssl") == 0)
 197                                 *port_ptr=443;
 198                         else if (strcmp(str,"ftp") == 0)
 199                                 *port_ptr=21;
 200                         else if (strcmp(str,"gopher") == 0)
 201                                 *port_ptr=70;
 202 #if 0
 203                         else if (strcmp(str,"wais") == 0)
 204                                 *port_ptr=21;
 205 #endif
 206                         else
 207                                 {
 208                                 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
 209                                 ERR_add_error_data(3,"service='",str,"'");
 210                                 return(0);
 211                                 }
 212                         }
 213                 }
 214         return(1);
 215         }
 216
 217 int BIO_sock_error(int sock)
 218         {
 219         int j,i;
 220         int size;
 221
 222         size=sizeof(int);
 223         /* Note: under Windows the third parameter is of type (char *)
 224          * whereas under other systems it is (void *) if you don't have
 225          * a cast it will choke the compiler: if you do have a cast then
 226          * you can either go for (char *) or (void *).
 227          */
 228         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
 229         if (i < 0)
 230                 return(1);
 231         else
 232                 return(j);
 233         }
 234
 235 #if 0
 236 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
 237         {
 238         int i;
 239         char **p;
 240
 241         switch (cmd)
 242                 {
 243         case BIO_GHBN_CTRL_HITS:
 244                 return(BIO_ghbn_hits);
 245                 /* break; */
 246         case BIO_GHBN_CTRL_MISSES:
 247                 return(BIO_ghbn_miss);
 248                 /* break; */
 249         case BIO_GHBN_CTRL_CACHE_SIZE:
 250                 return(GHBN_NUM);
 251                 /* break; */
 252         case BIO_GHBN_CTRL_GET_ENTRY:
 253                 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
 254                         (ghbn_cache[iarg].order > 0))
 255                         {
 256                         p=(char **)parg;
 257                         if (p == NULL) return(0);
 258                         *p=ghbn_cache[iarg].name;
 259                         ghbn_cache[iarg].name[128]='\0';
 260                         return(1);
 261                         }
 262                 return(0);
 263                 /* break; */
 264         case BIO_GHBN_CTRL_FLUSH:
 265                 for (i=0; i<GHBN_NUM; i++)
 266                         ghbn_cache[i].order=0;
 267                 break;
 268         default:
 269                 return(0);
 270                 }
 271         return(1);
 272         }
 273 #endif
 274
 275 #if 0
 276 static struct hostent *ghbn_dup(struct hostent *a)
 277         {
 278         struct hostent *ret;
 279         int i,j;
 280
 281         MemCheck_off();
 282         ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
 283         if (ret == NULL) return(NULL);
 284         memset(ret,0,sizeof(struct hostent));
 285
 286         for (i=0; a->h_aliases[i] != NULL; i++)
 287                 ;
 288         i++;
 289         ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
 290         if (ret->h_aliases == NULL)
 291                 goto err;
 292         memset(ret->h_aliases, 0, i*sizeof(char *));
 293
 294         for (i=0; a->h_addr_list[i] != NULL; i++)
 295                 ;
 296         i++;
 297         ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
 298         if (ret->h_addr_list == NULL)
 299                 goto err;
 300         memset(ret->h_addr_list, 0, i*sizeof(char *));
 301
 302         j=strlen(a->h_name)+1;
 303         if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
 304         memcpy((char *)ret->h_name,a->h_name,j);
 305         for (i=0; a->h_aliases[i] != NULL; i++)
 306                 {
 307                 j=strlen(a->h_aliases[i])+1;
 308                 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
 309                 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
 310                 }
 311         ret->h_length=a->h_length;
 312         ret->h_addrtype=a->h_addrtype;
 313         for (i=0; a->h_addr_list[i] != NULL; i++)
 314                 {
 315                 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
 316                         goto err;
 317                 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
 318                 }
 319         if (0)
 320                 {
 321 err:
 322                 if (ret != NULL)
 323                         ghbn_free(ret);
 324                 ret=NULL;
 325                 }
 326         MemCheck_on();
 327         return(ret);
 328         }
 329
 330 static void ghbn_free(struct hostent *a)
 331         {
 332         int i;
 333
 334         if(a == NULL)
 335             return;
 336
 337         if (a->h_aliases != NULL)
 338                 {
 339                 for (i=0; a->h_aliases[i] != NULL; i++)
 340                         OPENSSL_free(a->h_aliases[i]);
 341                 OPENSSL_free(a->h_aliases);
 342                 }
 343         if (a->h_addr_list != NULL)
 344                 {
 345                 for (i=0; a->h_addr_list[i] != NULL; i++)
 346                         OPENSSL_free(a->h_addr_list[i]);
 347                 OPENSSL_free(a->h_addr_list);
 348                 }
 349         if (a->h_name != NULL) OPENSSL_free(a->h_name);
 350         OPENSSL_free(a);
 351         }
 352
 353 #endif
 354
 355 struct hostent *BIO_gethostbyname(const char *name)
 356         {
 357 #if 1
 358         /* Caching gethostbyname() results forever is wrong,
 359          * so we have to let the true gethostbyname() worry about this */
 360         return gethostbyname(name);
 361 #else
 362         struct hostent *ret;
 363         int i,lowi=0,j;
 364         unsigned long low= (unsigned long)-1;
 365
 366
 367 #  if 0
 368         /* It doesn't make sense to use locking here: The function interface
 369          * is not thread-safe, because threads can never be sure when
 370          * some other thread destroys the data they were given a pointer to.
 371          */
 372         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
 373 #  endif
 374         j=strlen(name);
 375         if (j < 128)
 376                 {
 377                 for (i=0; i<GHBN_NUM; i++)
 378                         {
 379                         if (low > ghbn_cache[i].order)
 380                                 {
 381                                 low=ghbn_cache[i].order;
 382                                 lowi=i;
 383                                 }
 384                         if (ghbn_cache[i].order > 0)
 385                                 {
 386                                 if (strncmp(name,ghbn_cache[i].name,128) == 0)
 387                                         break;
 388                                 }
 389                         }
 390                 }
 391         else
 392                 i=GHBN_NUM;
 393
 394         if (i == GHBN_NUM) /* no hit*/
 395                 {
 396                 BIO_ghbn_miss++;
 397                 /* Note: under VMS with SOCKETSHR, it seems like the first
 398                  * parameter is 'char *', instead of 'const char *'
 399                  */
 400                 ret=gethostbyname(
 401 #  ifndef CONST_STRICT
 402                     (char *)
 403 #  endif
 404                     name);
 405
 406                 if (ret == NULL)
 407                         goto end;
 408                 if (j > 128) /* too big to cache */
 409                         {
 410 #  if 0
 411                         /* If we were trying to make this function thread-safe (which
 412                          * is bound to fail), we'd have to give up in this case
 413                          * (or allocate more memory). */
 414                         ret = NULL;
 415 #  endif
 416                         goto end;
 417                         }
 418
 419                 /* else add to cache */
 420                 if (ghbn_cache[lowi].ent != NULL)
 421                         ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
 422                 ghbn_cache[lowi].name[0] = '\0';
 423
 424                 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
 425                         {
 426                         BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
 427                         goto end;
 428                         }
 429                 strncpy(ghbn_cache[lowi].name,name,128);
 430                 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
 431                 }
 432         else
 433                 {
 434                 BIO_ghbn_hits++;
 435                 ret= ghbn_cache[i].ent;
 436                 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
 437                 }
 438 end:
 439 #  if 0
 440         CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
 441 #  endif
 442         return(ret);
 443 #endif
 444         }
 445
 446
 447 int BIO_sock_init(void)
 448         {
 449 #ifdef OPENSSL_SYS_WINDOWS
 450         static struct WSAData wsa_state;
 451
 452         if (!wsa_init_done)
 453                 {
 454                 int err;
 455
 456 #ifdef SIGINT
 457                 signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
 458 #endif
 459                 wsa_init_done=1;
 460                 memset(&wsa_state,0,sizeof(wsa_state));
 461                 if (WSAStartup(0x0101,&wsa_state)!=0)
 462                         {
 463                         err=WSAGetLastError();
 464                         SYSerr(SYS_F_WSASTARTUP,err);
 465                         BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
 466                         return(-1);
 467                         }
 468                 }
 469 #endif /* OPENSSL_SYS_WINDOWS */
 470         return(1);
 471         }
 472
 473 void BIO_sock_cleanup(void)
 474         {
 475 #ifdef OPENSSL_SYS_WINDOWS
 476         if (wsa_init_done)
 477                 {
 478                 wsa_init_done=0;
 479                 WSACancelBlockingCall();
 480                 WSACleanup();
 481                 }
 482 #endif
 483         }
 484
 485 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
 486
 487 int BIO_socket_ioctl(int fd, long type, unsigned long *arg)
 488         {
 489         int i;
 490
 491 #ifdef __DJGPP__
 492         i=ioctlsocket(fd,type,(char *)arg);
 493 #else
 494         i=ioctlsocket(fd,type,arg);
 495 #endif /* __DJGPP__ */
 496         if (i < 0)
 497                 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
 498         return(i);
 499         }
 500 #endif /* __VMS_VER */
 501
 502 /* The reason I have implemented this instead of using sscanf is because
 503  * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
 504 static int get_ip(const char *str, unsigned char ip[4])
 505         {
 506         unsigned int tmp[4];
 507         int num=0,c,ok=0;
 508
 509         tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
 510
 511         for (;;)
 512                 {
 513                 c= *(str++);
 514                 if ((c >= '0') && (c <= '9'))
 515                         {
 516                         ok=1;
 517                         tmp[num]=tmp[num]*10+c-'0';
 518                         if (tmp[num] > 255) return(0);
 519                         }
 520                 else if (c == '.')
 521                         {
 522                         if (!ok) return(-1);
 523                         if (num == 3) return(0);
 524                         num++;
 525                         ok=0;
 526                         }
 527                 else if (c == '\0' && (num == 3) && ok)
 528                         break;
 529                 else
 530                         return(0);
 531                 }
 532         ip[0]=tmp[0];
 533         ip[1]=tmp[1];
 534         ip[2]=tmp[2];
 535         ip[3]=tmp[3];
 536         return(1);
 537         }
 538
 539 int BIO_get_accept_socket(char *host, int bind_mode)
 540         {
 541         int ret=0;
 542         struct sockaddr_in server,client;
 543         int s=INVALID_SOCKET,cs;
 544         unsigned char ip[4];
 545         unsigned short port;
 546         char *str=NULL,*e;
 547         const char *h,*p;
 548         unsigned long l;
 549         int err_num;
 550
 551         if (BIO_sock_init() != 1) return(INVALID_SOCKET);
 552
 553         if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
 554
 555         h=p=NULL;
 556         h=str;
 557         for (e=str; *e; e++)
 558                 {
 559                 if (*e == ':')
 560                         {
 561                         p= &(e[1]);
 562                         *e='\0';
 563                         }
 564                 else if (*e == '/')
 565                         {
 566                         *e='\0';
 567                         break;
 568                         }
 569                 }
 570
 571         if (p == NULL)
 572                 {
 573                 p=h;
 574                 h="*";
 575                 }
 576
 577         if (!BIO_get_port(p,&port)) goto err;
 578
 579         memset((char *)&server,0,sizeof(server));
 580         server.sin_family=AF_INET;
 581         server.sin_port=htons(port);
 582
 583         if (strcmp(h,"*") == 0)
 584                 server.sin_addr.s_addr=INADDR_ANY;
 585         else
 586                 {
 587                 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
 588                 l=(unsigned long)
 589                         ((unsigned long)ip[0]<<24L)|
 590                         ((unsigned long)ip[1]<<16L)|
 591                         ((unsigned long)ip[2]<< 8L)|
 592                         ((unsigned long)ip[3]);
 593                 server.sin_addr.s_addr=htonl(l);
 594                 }
 595
 596 again:
 597         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 598         if (s == INVALID_SOCKET)
 599                 {
 600                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
 601                 ERR_add_error_data(3,"port='",host,"'");
 602                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
 603                 goto err;
 604                 }
 605
 606 #ifdef SO_REUSEADDR
 607         if (bind_mode == BIO_BIND_REUSEADDR)
 608                 {
 609                 int i=1;
 610
 611                 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
 612                 bind_mode=BIO_BIND_NORMAL;
 613                 }
 614 #endif
 615         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 616                 {
 617 #ifdef SO_REUSEADDR
 618                 err_num=get_last_socket_error();
 619                 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
 620                         (err_num == EADDRINUSE))
 621                         {
 622                         memcpy((char *)&client,(char *)&server,sizeof(server));
 623                         if (strcmp(h,"*") == 0)
 624                                 client.sin_addr.s_addr=htonl(0x7F000001);
 625                         cs=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 626                         if (cs != INVALID_SOCKET)
 627                                 {
 628                                 int ii;
 629                                 ii=connect(cs,(struct sockaddr *)&client,
 630                                         sizeof(client));
 631                                 closesocket(cs);
 632                                 if (ii == INVALID_SOCKET)
 633                                         {
 634                                         bind_mode=BIO_BIND_REUSEADDR;
 635                                         closesocket(s);
 636                                         goto again;
 637                                         }
 638                                 /* else error */
 639                                 }
 640                         /* else error */
 641                         }
 642 #endif
 643                 SYSerr(SYS_F_BIND,err_num);
 644                 ERR_add_error_data(3,"port='",host,"'");
 645                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
 646                 goto err;
 647                 }
 648         if (listen(s,MAX_LISTEN) == -1)
 649                 {
 650                 SYSerr(SYS_F_BIND,get_last_socket_error());
 651                 ERR_add_error_data(3,"port='",host,"'");
 652                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
 653                 goto err;
 654                 }
 655         ret=1;
 656 err:
 657         if (str != NULL) OPENSSL_free(str);
 658         if ((ret == 0) && (s != INVALID_SOCKET))
 659                 {
 660                 closesocket(s);
 661                 s= INVALID_SOCKET;
 662                 }
 663         return(s);
 664         }
 665
 666 int BIO_accept(int sock, char **addr)
 667         {
 668         int ret=INVALID_SOCKET;
 669         static struct sockaddr_in from;
 670         unsigned long l;
 671         unsigned short port;
 672         int len;
 673         char *p;
 674
 675         memset((char *)&from,0,sizeof(from));
 676         len=sizeof(from);
 677         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
 678          * of type (int *) whereas under other systems it is (void *) if
 679          * you don't have a cast it will choke the compiler: if you do
 680          * have a cast then you can either go for (int *) or (void *).
 681          */
 682         ret=accept(sock,(struct sockaddr *)&from,(void *)&len);
 683         if (ret == INVALID_SOCKET)
 684                 {
 685                 if(BIO_sock_should_retry(ret)) return -2;
 686                 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
 687                 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
 688                 goto end;
 689                 }
 690
 691         if (addr == NULL) goto end;
 692
 693         l=ntohl(from.sin_addr.s_addr);
 694         port=ntohs(from.sin_port);
 695         if (*addr == NULL)
 696                 {
 697                 if ((p=OPENSSL_malloc(24)) == NULL)
 698                         {
 699                         BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
 700                         goto end;
 701                         }
 702                 *addr=p;
 703                 }
 704         sprintf(*addr,"%d.%d.%d.%d:%d",
 705                 (unsigned char)(l>>24L)&0xff,
 706                 (unsigned char)(l>>16L)&0xff,
 707                 (unsigned char)(l>> 8L)&0xff,
 708                 (unsigned char)(l     )&0xff,
 709                 port);
 710 end:
 711         return(ret);
 712         }
 713
 714 int BIO_set_tcp_ndelay(int s, int on)
 715         {
 716         int ret=0;
 717 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
 718         int opt;
 719
 720 #ifdef SOL_TCP
 721         opt=SOL_TCP;
 722 #else
 723 #ifdef IPPROTO_TCP
 724         opt=IPPROTO_TCP;
 725 #endif
 726 #endif
 727
 728         ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
 729 #endif
 730         return(ret == 0);
 731         }
 732 #endif
 733
 734 int BIO_socket_nbio(int s, int mode)
 735         {
 736         int ret= -1;
 737         unsigned long l;
 738
 739         l=mode;
 740 #ifdef FIONBIO
 741         ret=BIO_socket_ioctl(s,FIONBIO,&l);
 742 #endif
 743         return(ret == 0);
 744         }