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 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <errno.h>
  62 #define USE_SOCKETS
  63 #include "cryptlib.h"
  64 #include <openssl/bio.h>
  65 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
  66 #include "netdb.h"
  67 #endif
  68
  69 #ifndef OPENSSL_NO_SOCK
  70
  71 #include <openssl/dso.h>
  72
  73 #define SOCKET_PROTOCOL IPPROTO_TCP
  74
  75 #ifdef SO_MAXCONN
  76 #define MAX_LISTEN  SO_MAXCONN
  77 #elif defined(SOMAXCONN)
  78 #define MAX_LISTEN  SOMAXCONN
  79 #else
  80 #define MAX_LISTEN  32
  81 #endif
  82
  83 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
  84 static int wsa_init_done=0;
  85 #endif
  86
  87 #if 0
  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 #endif
  99
 100 static int get_ip(const char *str,unsigned char *ip);
 101 #if 0
 102 static void ghbn_free(struct hostent *a);
 103 static struct hostent *ghbn_dup(struct hostent *a);
 104 #endif
 105 int BIO_get_host_ip(const char *str, unsigned char *ip)
 106         {
 107         int i;
 108         int err = 1;
 109         int locked = 0;
 110         struct hostent *he;
 111
 112         i=get_ip(str,ip);
 113         if (i < 0)
 114                 {
 115                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
 116                 goto err;
 117                 }
 118
 119         /* At this point, we have something that is most probably correct
 120            in some way, so let's init the socket. */
 121         if (BIO_sock_init() != 1)
 122                 return 0; /* don't generate another error code here */
 123
 124         /* If the string actually contained an IP address, we need not do
 125            anything more */
 126         if (i > 0) return(1);
 127
 128         /* do a gethostbyname */
 129         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
 130         locked = 1;
 131         he=BIO_gethostbyname(str);
 132         if (he == NULL)
 133                 {
 134                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
 135                 goto err;
 136                 }
 137
 138         /* cast to short because of win16 winsock definition */
 139         if ((short)he->h_addrtype != AF_INET)
 140                 {
 141                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
 142                 goto err;
 143                 }
 144         for (i=0; i<4; i++)
 145                 ip[i]=he->h_addr_list[0][i];
 146         err = 0;
 147
 148  err:
 149         if (locked)
 150                 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
 151         if (err)
 152                 {
 153                 ERR_add_error_data(2,"host=",str);
 154                 return 0;
 155                 }
 156         else
 157                 return 1;
 158         }
 159
 160 int BIO_get_port(const char *str, unsigned short *port_ptr)
 161         {
 162         int i;
 163         struct servent *s;
 164
 165         if (str == NULL)
 166                 {
 167                 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
 168                 return(0);
 169                 }
 170         i=atoi(str);
 171         if (i != 0)
 172                 *port_ptr=(unsigned short)i;
 173         else
 174                 {
 175                 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
 176                 /* Note: under VMS with SOCKETSHR, it seems like the first
 177                  * parameter is 'char *', instead of 'const char *'
 178                  */
 179                 s=getservbyname(
 180 #ifndef CONST_STRICT
 181                     (char *)
 182 #endif
 183                     str,"tcp");
 184                 if(s != NULL)
 185                         *port_ptr=ntohs((unsigned short)s->s_port);
 186                 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
 187                 if(s == NULL)
 188                         {
 189                         if (strcmp(str,"http") == 0)
 190                                 *port_ptr=80;
 191                         else if (strcmp(str,"telnet") == 0)
 192                                 *port_ptr=23;
 193                         else if (strcmp(str,"socks") == 0)
 194                                 *port_ptr=1080;
 195                         else if (strcmp(str,"https") == 0)
 196                                 *port_ptr=443;
 197                         else if (strcmp(str,"ssl") == 0)
 198                                 *port_ptr=443;
 199                         else if (strcmp(str,"ftp") == 0)
 200                                 *port_ptr=21;
 201                         else if (strcmp(str,"gopher") == 0)
 202                                 *port_ptr=70;
 203 #if 0
 204                         else if (strcmp(str,"wais") == 0)
 205                                 *port_ptr=21;
 206 #endif
 207                         else
 208                                 {
 209                                 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
 210                                 ERR_add_error_data(3,"service='",str,"'");
 211                                 return(0);
 212                                 }
 213                         }
 214                 }
 215         return(1);
 216         }
 217
 218 int BIO_sock_error(int sock)
 219         {
 220         int j,i;
 221         int size;
 222
 223         size=sizeof(int);
 224         /* Note: under Windows the third parameter is of type (char *)
 225          * whereas under other systems it is (void *) if you don't have
 226          * a cast it will choke the compiler: if you do have a cast then
 227          * you can either go for (char *) or (void *).
 228          */
 229         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
 230         if (i < 0)
 231                 return(1);
 232         else
 233                 return(j);
 234         }
 235
 236 #if 0
 237 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
 238         {
 239         int i;
 240         char **p;
 241
 242         switch (cmd)
 243                 {
 244         case BIO_GHBN_CTRL_HITS:
 245                 return(BIO_ghbn_hits);
 246                 /* break; */
 247         case BIO_GHBN_CTRL_MISSES:
 248                 return(BIO_ghbn_miss);
 249                 /* break; */
 250         case BIO_GHBN_CTRL_CACHE_SIZE:
 251                 return(GHBN_NUM);
 252                 /* break; */
 253         case BIO_GHBN_CTRL_GET_ENTRY:
 254                 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
 255                         (ghbn_cache[iarg].order > 0))
 256                         {
 257                         p=(char **)parg;
 258                         if (p == NULL) return(0);
 259                         *p=ghbn_cache[iarg].name;
 260                         ghbn_cache[iarg].name[128]='\0';
 261                         return(1);
 262                         }
 263                 return(0);
 264                 /* break; */
 265         case BIO_GHBN_CTRL_FLUSH:
 266                 for (i=0; i<GHBN_NUM; i++)
 267                         ghbn_cache[i].order=0;
 268                 break;
 269         default:
 270                 return(0);
 271                 }
 272         return(1);
 273         }
 274 #endif
 275
 276 #if 0
 277 static struct hostent *ghbn_dup(struct hostent *a)
 278         {
 279         struct hostent *ret;
 280         int i,j;
 281
 282         MemCheck_off();
 283         ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
 284         if (ret == NULL) return(NULL);
 285         memset(ret,0,sizeof(struct hostent));
 286
 287         for (i=0; a->h_aliases[i] != NULL; i++)
 288                 ;
 289         i++;
 290         ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
 291         if (ret->h_aliases == NULL)
 292                 goto err;
 293         memset(ret->h_aliases, 0, i*sizeof(char *));
 294
 295         for (i=0; a->h_addr_list[i] != NULL; i++)
 296                 ;
 297         i++;
 298         ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
 299         if (ret->h_addr_list == NULL)
 300                 goto err;
 301         memset(ret->h_addr_list, 0, i*sizeof(char *));
 302
 303         j=strlen(a->h_name)+1;
 304         if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
 305         memcpy((char *)ret->h_name,a->h_name,j);
 306         for (i=0; a->h_aliases[i] != NULL; i++)
 307                 {
 308                 j=strlen(a->h_aliases[i])+1;
 309                 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
 310                 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
 311                 }
 312         ret->h_length=a->h_length;
 313         ret->h_addrtype=a->h_addrtype;
 314         for (i=0; a->h_addr_list[i] != NULL; i++)
 315                 {
 316                 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
 317                         goto err;
 318                 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
 319                 }
 320         if (0)
 321                 {
 322 err:
 323                 if (ret != NULL)
 324                         ghbn_free(ret);
 325                 ret=NULL;
 326                 }
 327         MemCheck_on();
 328         return(ret);
 329         }
 330
 331 static void ghbn_free(struct hostent *a)
 332         {
 333         int i;
 334
 335         if(a == NULL)
 336             return;
 337
 338         if (a->h_aliases != NULL)
 339                 {
 340                 for (i=0; a->h_aliases[i] != NULL; i++)
 341                         OPENSSL_free(a->h_aliases[i]);
 342                 OPENSSL_free(a->h_aliases);
 343                 }
 344         if (a->h_addr_list != NULL)
 345                 {
 346                 for (i=0; a->h_addr_list[i] != NULL; i++)
 347                         OPENSSL_free(a->h_addr_list[i]);
 348                 OPENSSL_free(a->h_addr_list);
 349                 }
 350         if (a->h_name != NULL) OPENSSL_free(a->h_name);
 351         OPENSSL_free(a);
 352         }
 353
 354 #endif
 355
 356 struct hostent *BIO_gethostbyname(const char *name)
 357         {
 358 #if 1
 359         /* Caching gethostbyname() results forever is wrong,
 360          * so we have to let the true gethostbyname() worry about this */
 361         return gethostbyname(name);
 362 #else
 363         struct hostent *ret;
 364         int i,lowi=0,j;
 365         unsigned long low= (unsigned long)-1;
 366
 367
 368 #  if 0
 369         /* It doesn't make sense to use locking here: The function interface
 370          * is not thread-safe, because threads can never be sure when
 371          * some other thread destroys the data they were given a pointer to.
 372          */
 373         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
 374 #  endif
 375         j=strlen(name);
 376         if (j < 128)
 377                 {
 378                 for (i=0; i<GHBN_NUM; i++)
 379                         {
 380                         if (low > ghbn_cache[i].order)
 381                                 {
 382                                 low=ghbn_cache[i].order;
 383                                 lowi=i;
 384                                 }
 385                         if (ghbn_cache[i].order > 0)
 386                                 {
 387                                 if (strncmp(name,ghbn_cache[i].name,128) == 0)
 388                                         break;
 389                                 }
 390                         }
 391                 }
 392         else
 393                 i=GHBN_NUM;
 394
 395         if (i == GHBN_NUM) /* no hit*/
 396                 {
 397                 BIO_ghbn_miss++;
 398                 /* Note: under VMS with SOCKETSHR, it seems like the first
 399                  * parameter is 'char *', instead of 'const char *'
 400                  */
 401                 ret=gethostbyname(
 402 #  ifndef CONST_STRICT
 403                     (char *)
 404 #  endif
 405                     name);
 406
 407                 if (ret == NULL)
 408                         goto end;
 409                 if (j > 128) /* too big to cache */
 410                         {
 411 #  if 0
 412                         /* If we were trying to make this function thread-safe (which
 413                          * is bound to fail), we'd have to give up in this case
 414                          * (or allocate more memory). */
 415                         ret = NULL;
 416 #  endif
 417                         goto end;
 418                         }
 419
 420                 /* else add to cache */
 421                 if (ghbn_cache[lowi].ent != NULL)
 422                         ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
 423                 ghbn_cache[lowi].name[0] = '\0';
 424
 425                 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
 426                         {
 427                         BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
 428                         goto end;
 429                         }
 430                 strncpy(ghbn_cache[lowi].name,name,128);
 431                 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
 432                 }
 433         else
 434                 {
 435                 BIO_ghbn_hits++;
 436                 ret= ghbn_cache[i].ent;
 437                 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
 438                 }
 439 end:
 440 #  if 0
 441         CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
 442 #  endif
 443         return(ret);
 444 #endif
 445         }
 446
 447
 448 int BIO_sock_init(void)
 449         {
 450 #ifdef OPENSSL_SYS_WINDOWS
 451         static struct WSAData wsa_state;
 452
 453         if (!wsa_init_done)
 454                 {
 455                 int err;
 456
 457 #ifdef SIGINT
 458                 signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
 459 #endif
 460                 wsa_init_done=1;
 461                 memset(&wsa_state,0,sizeof(wsa_state));
 462                 /* Not making wsa_state available to the rest of the
 463                  * code is formally wrong. But the structures we use
 464                  * are [beleived to be] invariable among Winsock DLLs,
 465                  * while API availability is [expected to be] probed
 466                  * at run-time with DSO_global_lookup. */
 467                 if (WSAStartup(0x0202,&wsa_state)!=0)
 468                         {
 469                         err=WSAGetLastError();
 470                         SYSerr(SYS_F_WSASTARTUP,err);
 471                         BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
 472                         return(-1);
 473                         }
 474                 }
 475 #endif /* OPENSSL_SYS_WINDOWS */
 476 #ifdef WATT32
 477         extern int _watt_do_exit;
 478         _watt_do_exit = 0;    /* don't make sock_init() call exit() */
 479         if (sock_init())
 480                 return (-1);
 481 #endif
 482
 483 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 484     WORD wVerReq;
 485     WSADATA wsaData;
 486     int err;
 487
 488     if (!wsa_init_done)
 489     {
 490
 491 # ifdef SIGINT
 492         signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
 493 # endif
 494
 495         wsa_init_done=1;
 496         wVerReq = MAKEWORD( 2, 0 );
 497         err = WSAStartup(wVerReq,&wsaData);
 498         if (err != 0)
 499         {
 500             SYSerr(SYS_F_WSASTARTUP,err);
 501             BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
 502             return(-1);
 503                         }
 504                 }
 505 #endif
 506
 507         return(1);
 508         }
 509
 510 void BIO_sock_cleanup(void)
 511         {
 512 #ifdef OPENSSL_SYS_WINDOWS
 513         if (wsa_init_done)
 514                 {
 515                 wsa_init_done=0;
 516 #ifndef OPENSSL_SYS_WINCE
 517                 WSACancelBlockingCall();
 518 #endif
 519                 WSACleanup();
 520                 }
 521 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 522    if (wsa_init_done)
 523         {
 524         wsa_init_done=0;
 525         WSACleanup();
 526                 }
 527 #endif
 528         }
 529
 530 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
 531
 532 int BIO_socket_ioctl(int fd, long type, void *arg)
 533         {
 534         int i;
 535
 536 #ifdef __DJGPP__
 537         i=ioctlsocket(fd,type,(char *)arg);
 538 #else
 539         i=ioctlsocket(fd,type,arg);
 540 #endif /* __DJGPP__ */
 541         if (i < 0)
 542                 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
 543         return(i);
 544         }
 545 #endif /* __VMS_VER */
 546
 547 /* The reason I have implemented this instead of using sscanf is because
 548  * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
 549 static int get_ip(const char *str, unsigned char ip[4])
 550         {
 551         unsigned int tmp[4];
 552         int num=0,c,ok=0;
 553
 554         tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
 555
 556         for (;;)
 557                 {
 558                 c= *(str++);
 559                 if ((c >= '0') && (c <= '9'))
 560                         {
 561                         ok=1;
 562                         tmp[num]=tmp[num]*10+c-'0';
 563                         if (tmp[num] > 255) return(0);
 564                         }
 565                 else if (c == '.')
 566                         {
 567                         if (!ok) return(-1);
 568                         if (num == 3) return(0);
 569                         num++;
 570                         ok=0;
 571                         }
 572                 else if (c == '\0' && (num == 3) && ok)
 573                         break;
 574                 else
 575                         return(0);
 576                 }
 577         ip[0]=tmp[0];
 578         ip[1]=tmp[1];
 579         ip[2]=tmp[2];
 580         ip[3]=tmp[3];
 581         return(1);
 582         }
 583
 584 int BIO_get_accept_socket(char *host, int bind_mode)
 585         {
 586         int ret=0;
 587         struct sockaddr server,client;
 588         struct sockaddr_in *sin;
 589         int s=INVALID_SOCKET,cs;
 590         unsigned char ip[4];
 591         unsigned short port;
 592         char *str=NULL,*e;
 593         char *h,*p;
 594         unsigned long l;
 595         int err_num;
 596
 597         if (BIO_sock_init() != 1) return(INVALID_SOCKET);
 598
 599         if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
 600
 601         h=p=NULL;
 602         h=str;
 603         for (e=str; *e; e++)
 604                 {
 605                 if (*e == ':')
 606                         {
 607                         p=e;
 608                         }
 609                 else if (*e == '/')
 610                         {
 611                         *e='\0';
 612                         break;
 613                         }
 614                 }
 615         if (p)  *p++='\0';      /* points at last ':', '::port' is special [see below] */
 616         else    p=h,h=NULL;
 617
 618 #ifdef EAI_FAMILY
 619         do {
 620         static union {  void *p;
 621                         int (*f)(const char *,const char *,
 622                                  const struct addrinfo *,
 623                                  struct addrinfo **);
 624                         } getaddrinfo = {NULL};
 625         static union {  void *p;
 626                         void (*f)(struct addrinfo *);
 627                         } freeaddrinfo = {NULL};
 628         struct addrinfo *res,hint;
 629
 630         if (getaddrinfo.p==NULL)
 631                 {
 632                 if ((getaddrinfo.p=DSO_global_lookup("getaddrinfo"))==NULL ||
 633                     (freeaddrinfo.p=DSO_global_lookup("freeaddrinfo"))==NULL)
 634                         getaddrinfo.p=(void*)-1;
 635                 }
 636         if (getaddrinfo.p==(void *)-1) break;
 637
 638         /* '::port' enforces IPv6 wildcard listener. Some OSes,
 639          * e.g. Solaris, default to IPv6 without any hint. Also
 640          * note that commonly IPv6 wildchard socket can service
 641          * IPv4 connections just as well...  */
 642         memset(&hint,0,sizeof(hint));
 643         if (h && strchr(h,':')) hint.ai_family = AF_INET6;
 644         if ((*getaddrinfo.f)(h,p,&hint,&res)) break;
 645         server = *res->ai_addr;
 646         (*freeaddrinfo.f)(res);
 647         goto again;
 648         } while (0);
 649 #endif
 650
 651         if (!BIO_get_port(p,&port)) goto err;
 652
 653         memset((char *)&server,0,sizeof(server));
 654         sin = (struct sockaddr_in *)&server;
 655         sin->sin_family=AF_INET;
 656         sin->sin_port=htons(port);
 657
 658         if (h == NULL || strcmp(h,"*") == 0)
 659                 sin->sin_addr.s_addr=INADDR_ANY;
 660         else
 661                 {
 662                 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
 663                 l=(unsigned long)
 664                         ((unsigned long)ip[0]<<24L)|
 665                         ((unsigned long)ip[1]<<16L)|
 666                         ((unsigned long)ip[2]<< 8L)|
 667                         ((unsigned long)ip[3]);
 668                 sin->sin_addr.s_addr=htonl(l);
 669                 }
 670
 671 again:
 672         s=socket(server.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
 673         if (s == INVALID_SOCKET)
 674                 {
 675                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
 676                 ERR_add_error_data(3,"port='",host,"'");
 677                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
 678                 goto err;
 679                 }
 680
 681 #ifdef SO_REUSEADDR
 682         if (bind_mode == BIO_BIND_REUSEADDR)
 683                 {
 684                 int i=1;
 685
 686                 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
 687                 bind_mode=BIO_BIND_NORMAL;
 688                 }
 689 #endif
 690         if (bind(s,&server,sizeof(server)) == -1)
 691                 {
 692 #ifdef SO_REUSEADDR
 693                 err_num=get_last_socket_error();
 694                 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
 695                         (err_num == EADDRINUSE))
 696                         {
 697                         client = server;
 698                         if (h == NULL || strcmp(h,"*") == 0)
 699                                 {
 700 #ifdef AF_INET6
 701                                 if (client.sa_family == AF_INET6)
 702                                         {
 703                                         struct sockaddr_in6 *sin =
 704                                                 (struct sockaddr_in6 *)&client;
 705                                         memset(&sin->sin6_addr,0,sizeof(sin->sin6_addr));
 706                                         sin->sin6_addr.s6_addr[15]=1;
 707                                         }
 708                                 else
 709 #endif
 710                                 if (client.sa_family == AF_INET)
 711                                         {
 712                                         struct sockaddr_in *sin =
 713                                                 (struct sockaddr_in *)&client;
 714                                         sin->sin_addr.s_addr=htonl(0x7F000001);
 715                                         }
 716                                 else    goto err;
 717                                 }
 718                         cs=socket(client.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
 719                         if (cs != INVALID_SOCKET)
 720                                 {
 721                                 int ii;
 722                                 ii=connect(cs,(struct sockaddr *)&client,
 723                                         sizeof(client));
 724                                 closesocket(cs);
 725                                 if (ii == INVALID_SOCKET)
 726                                         {
 727                                         bind_mode=BIO_BIND_REUSEADDR;
 728                                         closesocket(s);
 729                                         goto again;
 730                                         }
 731                                 /* else error */
 732                                 }
 733                         /* else error */
 734                         }
 735 #endif
 736                 SYSerr(SYS_F_BIND,err_num);
 737                 ERR_add_error_data(3,"port='",host,"'");
 738                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
 739                 goto err;
 740                 }
 741         if (listen(s,MAX_LISTEN) == -1)
 742                 {
 743                 SYSerr(SYS_F_BIND,get_last_socket_error());
 744                 ERR_add_error_data(3,"port='",host,"'");
 745                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
 746                 goto err;
 747                 }
 748         ret=1;
 749 err:
 750         if (str != NULL) OPENSSL_free(str);
 751         if ((ret == 0) && (s != INVALID_SOCKET))
 752                 {
 753                 closesocket(s);
 754                 s= INVALID_SOCKET;
 755                 }
 756         return(s);
 757         }
 758
 759 int BIO_accept(int sock, char **addr)
 760         {
 761         int ret=INVALID_SOCKET;
 762         struct sockaddr from;
 763         struct sockaddr_in *sin;
 764         unsigned long l;
 765         unsigned short port;
 766         int len;
 767         char *p;
 768
 769         memset(&from,0,sizeof(from));
 770         len=sizeof(from);
 771         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
 772          * of type (int *) whereas under other systems it is (void *) if
 773          * you don't have a cast it will choke the compiler: if you do
 774          * have a cast then you can either go for (int *) or (void *).
 775          */
 776         ret=accept(sock,&from,(void *)&len);
 777         if (ret == INVALID_SOCKET)
 778                 {
 779                 if(BIO_sock_should_retry(ret)) return -2;
 780                 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
 781                 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
 782                 goto end;
 783                 }
 784
 785         if (addr == NULL) goto end;
 786
 787 #ifdef EAI_FAMILY
 788         do {
 789         char   h[NI_MAXHOST],s[NI_MAXSERV];
 790         size_t l;
 791         static union {  void *p;
 792                         int (*f)(const struct sockaddr *,socklen_t,
 793                                  char *,size_t,char *,size_t,int);
 794                         } getnameinfo = {NULL};
 795
 796         if (getnameinfo.p==NULL)
 797                 {
 798                 if ((getnameinfo.p=DSO_global_lookup("getnameinfo"))==NULL)
 799                         getnameinfo.p=(void*)-1;
 800                 }
 801         if (getnameinfo.p==(void *)-1) break;
 802
 803         if ((*getnameinfo.f)(&from,sizeof(from),h,sizeof(h),s,sizeof(s),
 804             NI_NUMERICHOST|NI_NUMERICSERV)) break;
 805         l = strlen(h)+strlen(p)+2; if (len<24) len=24;
 806         p = *addr;
 807         if (p)  p = OPENSSL_realloc(p,l);
 808         else    p = OPENSSL_malloc(l);
 809         if (p==NULL)
 810                 {
 811                 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
 812                 goto end;
 813                 }
 814         *addr = p;
 815         BIO_snprintf(*addr,l,"%s:%s",h,s);
 816         goto end;
 817         } while(0);
 818 #endif
 819         if (from.sa_family != AF_INET) goto end;
 820         sin = (struct sockaddr_in *)&from;
 821         l=ntohl(sin->sin_addr.s_addr);
 822         port=ntohs(sin->sin_port);
 823         if (*addr == NULL)
 824                 {
 825                 if ((p=OPENSSL_malloc(24)) == NULL)
 826                         {
 827                         BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
 828                         goto end;
 829                         }
 830                 *addr=p;
 831                 }
 832         BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d",
 833                      (unsigned char)(l>>24L)&0xff,
 834                      (unsigned char)(l>>16L)&0xff,
 835                      (unsigned char)(l>> 8L)&0xff,
 836                      (unsigned char)(l     )&0xff,
 837                      port);
 838 end:
 839         return(ret);
 840         }
 841
 842 int BIO_set_tcp_ndelay(int s, int on)
 843         {
 844         int ret=0;
 845 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
 846         int opt;
 847
 848 #ifdef SOL_TCP
 849         opt=SOL_TCP;
 850 #else
 851 #ifdef IPPROTO_TCP
 852         opt=IPPROTO_TCP;
 853 #endif
 854 #endif
 855
 856         ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
 857 #endif
 858         return(ret == 0);
 859         }
 860 #endif
 861
 862 int BIO_socket_nbio(int s, int mode)
 863         {
 864         int ret= -1;
 865         int l;
 866
 867         l=mode;
 868 #ifdef FIONBIO
 869         ret=BIO_socket_ioctl(s,FIONBIO,&l);
 870 #endif
 871         return(ret == 0);
 872         }