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 #if defined(NETWARE_CLIB)
  68 #include <sys/ioctl.h>
  69 NETDB_DEFINE_CONTEXT
  70 #endif
  71 #endif
  72
  73 #ifndef OPENSSL_NO_SOCK
  74
  75 #include <openssl/dso.h>
  76
  77 #define SOCKET_PROTOCOL IPPROTO_TCP
  78
  79 #ifdef SO_MAXCONN
  80 #define MAX_LISTEN  SO_MAXCONN
  81 #elif defined(SOMAXCONN)
  82 #define MAX_LISTEN  SOMAXCONN
  83 #else
  84 #define MAX_LISTEN  32
  85 #endif
  86
  87 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
  88 static int wsa_init_done=0;
  89 #endif
  90
  91 /*
  92  * WSAAPI specifier is required to make indirect calls to run-time
  93  * linked WinSock 2 functions used in this module, to be specific
  94  * [get|free]addrinfo and getnameinfo. This is because WinSock uses
  95  * uses non-C calling convention, __stdcall vs. __cdecl, on x86
  96  * Windows. On non-WinSock platforms WSAAPI needs to be void.
  97  */
  98 #ifndef WSAAPI
  99 #define WSAAPI
 100 #endif
 101
 102 #if 0
 103 static unsigned long BIO_ghbn_hits=0L;
 104 static unsigned long BIO_ghbn_miss=0L;
 105
 106 #define GHBN_NUM        4
 107 static struct ghbn_cache_st
 108         {
 109         char name[129];
 110         struct hostent *ent;
 111         unsigned long order;
 112         } ghbn_cache[GHBN_NUM];
 113 #endif
 114
 115 static int get_ip(const char *str,unsigned char *ip);
 116 #if 0
 117 static void ghbn_free(struct hostent *a);
 118 static struct hostent *ghbn_dup(struct hostent *a);
 119 #endif
 120 int BIO_get_host_ip(const char *str, unsigned char *ip)
 121         {
 122         int i;
 123         int err = 1;
 124         int locked = 0;
 125         struct hostent *he;
 126
 127         i=get_ip(str,ip);
 128         if (i < 0)
 129                 {
 130                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
 131                 goto err;
 132                 }
 133
 134         /* At this point, we have something that is most probably correct
 135            in some way, so let's init the socket. */
 136         if (BIO_sock_init() != 1)
 137                 return 0; /* don't generate another error code here */
 138
 139         /* If the string actually contained an IP address, we need not do
 140            anything more */
 141         if (i > 0) return(1);
 142
 143         /* do a gethostbyname */
 144         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
 145         locked = 1;
 146         he=BIO_gethostbyname(str);
 147         if (he == NULL)
 148                 {
 149                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
 150                 goto err;
 151                 }
 152
 153         /* cast to short because of win16 winsock definition */
 154         if ((short)he->h_addrtype != AF_INET)
 155                 {
 156                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
 157                 goto err;
 158                 }
 159         for (i=0; i<4; i++)
 160                 ip[i]=he->h_addr_list[0][i];
 161         err = 0;
 162
 163  err:
 164         if (locked)
 165                 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
 166         if (err)
 167                 {
 168                 ERR_add_error_data(2,"host=",str);
 169                 return 0;
 170                 }
 171         else
 172                 return 1;
 173         }
 174
 175 int BIO_get_port(const char *str, unsigned short *port_ptr)
 176         {
 177         int i;
 178         struct servent *s;
 179
 180         if (str == NULL)
 181                 {
 182                 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
 183                 return(0);
 184                 }
 185         i=atoi(str);
 186         if (i != 0)
 187                 *port_ptr=(unsigned short)i;
 188         else
 189                 {
 190                 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
 191                 /* Note: under VMS with SOCKETSHR, it seems like the first
 192                  * parameter is 'char *', instead of 'const char *'
 193                  */
 194 #ifndef CONST_STRICT
 195                 s=getservbyname((char *)str,"tcp");
 196 #else
 197                 s=getservbyname(str,"tcp");
 198 #endif
 199                 if(s != NULL)
 200                         *port_ptr=ntohs((unsigned short)s->s_port);
 201                 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
 202                 if(s == NULL)
 203                         {
 204                         if (strcmp(str,"http") == 0)
 205                                 *port_ptr=80;
 206                         else if (strcmp(str,"telnet") == 0)
 207                                 *port_ptr=23;
 208                         else if (strcmp(str,"socks") == 0)
 209                                 *port_ptr=1080;
 210                         else if (strcmp(str,"https") == 0)
 211                                 *port_ptr=443;
 212                         else if (strcmp(str,"ssl") == 0)
 213                                 *port_ptr=443;
 214                         else if (strcmp(str,"ftp") == 0)
 215                                 *port_ptr=21;
 216                         else if (strcmp(str,"gopher") == 0)
 217                                 *port_ptr=70;
 218 #if 0
 219                         else if (strcmp(str,"wais") == 0)
 220                                 *port_ptr=21;
 221 #endif
 222                         else
 223                                 {
 224                                 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
 225                                 ERR_add_error_data(3,"service='",str,"'");
 226                                 return(0);
 227                                 }
 228                         }
 229                 }
 230         return(1);
 231         }
 232
 233 int BIO_sock_error(int sock)
 234         {
 235         int j,i;
 236         union { size_t s; int i; } size;
 237
 238         /* heuristic way to adapt for platforms that expect 64-bit optlen */
 239         size.s=0, size.i=sizeof(j);
 240         /* Note: under Windows the third parameter is of type (char *)
 241          * whereas under other systems it is (void *) if you don't have
 242          * a cast it will choke the compiler: if you do have a cast then
 243          * you can either go for (char *) or (void *).
 244          */
 245         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
 246         if (i < 0)
 247                 return(1);
 248         else
 249                 return(j);
 250         }
 251
 252 #if 0
 253 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
 254         {
 255         int i;
 256         char **p;
 257
 258         switch (cmd)
 259                 {
 260         case BIO_GHBN_CTRL_HITS:
 261                 return(BIO_ghbn_hits);
 262                 /* break; */
 263         case BIO_GHBN_CTRL_MISSES:
 264                 return(BIO_ghbn_miss);
 265                 /* break; */
 266         case BIO_GHBN_CTRL_CACHE_SIZE:
 267                 return(GHBN_NUM);
 268                 /* break; */
 269         case BIO_GHBN_CTRL_GET_ENTRY:
 270                 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
 271                         (ghbn_cache[iarg].order > 0))
 272                         {
 273                         p=(char **)parg;
 274                         if (p == NULL) return(0);
 275                         *p=ghbn_cache[iarg].name;
 276                         ghbn_cache[iarg].name[128]='\0';
 277                         return(1);
 278                         }
 279                 return(0);
 280                 /* break; */
 281         case BIO_GHBN_CTRL_FLUSH:
 282                 for (i=0; i<GHBN_NUM; i++)
 283                         ghbn_cache[i].order=0;
 284                 break;
 285         default:
 286                 return(0);
 287                 }
 288         return(1);
 289         }
 290 #endif
 291
 292 #if 0
 293 static struct hostent *ghbn_dup(struct hostent *a)
 294         {
 295         struct hostent *ret;
 296         int i,j;
 297
 298         MemCheck_off();
 299         ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
 300         if (ret == NULL) return(NULL);
 301         memset(ret,0,sizeof(struct hostent));
 302
 303         for (i=0; a->h_aliases[i] != NULL; i++)
 304                 ;
 305         i++;
 306         ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
 307         if (ret->h_aliases == NULL)
 308                 goto err;
 309         memset(ret->h_aliases, 0, i*sizeof(char *));
 310
 311         for (i=0; a->h_addr_list[i] != NULL; i++)
 312                 ;
 313         i++;
 314         ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
 315         if (ret->h_addr_list == NULL)
 316                 goto err;
 317         memset(ret->h_addr_list, 0, i*sizeof(char *));
 318
 319         j=strlen(a->h_name)+1;
 320         if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
 321         memcpy((char *)ret->h_name,a->h_name,j);
 322         for (i=0; a->h_aliases[i] != NULL; i++)
 323                 {
 324                 j=strlen(a->h_aliases[i])+1;
 325                 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
 326                 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
 327                 }
 328         ret->h_length=a->h_length;
 329         ret->h_addrtype=a->h_addrtype;
 330         for (i=0; a->h_addr_list[i] != NULL; i++)
 331                 {
 332                 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
 333                         goto err;
 334                 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
 335                 }
 336         if (0)
 337                 {
 338 err:
 339                 if (ret != NULL)
 340                         ghbn_free(ret);
 341                 ret=NULL;
 342                 }
 343         MemCheck_on();
 344         return(ret);
 345         }
 346
 347 static void ghbn_free(struct hostent *a)
 348         {
 349         int i;
 350
 351         if(a == NULL)
 352             return;
 353
 354         if (a->h_aliases != NULL)
 355                 {
 356                 for (i=0; a->h_aliases[i] != NULL; i++)
 357                         OPENSSL_free(a->h_aliases[i]);
 358                 OPENSSL_free(a->h_aliases);
 359                 }
 360         if (a->h_addr_list != NULL)
 361                 {
 362                 for (i=0; a->h_addr_list[i] != NULL; i++)
 363                         OPENSSL_free(a->h_addr_list[i]);
 364                 OPENSSL_free(a->h_addr_list);
 365                 }
 366         if (a->h_name != NULL) OPENSSL_free(a->h_name);
 367         OPENSSL_free(a);
 368         }
 369
 370 #endif
 371
 372 struct hostent *BIO_gethostbyname(const char *name)
 373         {
 374 #if 1
 375         /* Caching gethostbyname() results forever is wrong,
 376          * so we have to let the true gethostbyname() worry about this */
 377 #if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__))
 378         return gethostbyname((char*)name);
 379 #else
 380         return gethostbyname(name);
 381 #endif
 382 #else
 383         struct hostent *ret;
 384         int i,lowi=0,j;
 385         unsigned long low= (unsigned long)-1;
 386
 387
 388 #  if 0
 389         /* It doesn't make sense to use locking here: The function interface
 390          * is not thread-safe, because threads can never be sure when
 391          * some other thread destroys the data they were given a pointer to.
 392          */
 393         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
 394 #  endif
 395         j=strlen(name);
 396         if (j < 128)
 397                 {
 398                 for (i=0; i<GHBN_NUM; i++)
 399                         {
 400                         if (low > ghbn_cache[i].order)
 401                                 {
 402                                 low=ghbn_cache[i].order;
 403                                 lowi=i;
 404                                 }
 405                         if (ghbn_cache[i].order > 0)
 406                                 {
 407                                 if (strncmp(name,ghbn_cache[i].name,128) == 0)
 408                                         break;
 409                                 }
 410                         }
 411                 }
 412         else
 413                 i=GHBN_NUM;
 414
 415         if (i == GHBN_NUM) /* no hit*/
 416                 {
 417                 BIO_ghbn_miss++;
 418                 /* Note: under VMS with SOCKETSHR, it seems like the first
 419                  * parameter is 'char *', instead of 'const char *'
 420                  */
 421 #  ifndef CONST_STRICT
 422                 ret=gethostbyname((char *)name);
 423 #  else
 424                 ret=gethostbyname(name);
 425 #  endif
 426
 427                 if (ret == NULL)
 428                         goto end;
 429                 if (j > 128) /* too big to cache */
 430                         {
 431 #  if 0
 432                         /* If we were trying to make this function thread-safe (which
 433                          * is bound to fail), we'd have to give up in this case
 434                          * (or allocate more memory). */
 435                         ret = NULL;
 436 #  endif
 437                         goto end;
 438                         }
 439
 440                 /* else add to cache */
 441                 if (ghbn_cache[lowi].ent != NULL)
 442                         ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
 443                 ghbn_cache[lowi].name[0] = '\0';
 444
 445                 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
 446                         {
 447                         BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
 448                         goto end;
 449                         }
 450                 strncpy(ghbn_cache[lowi].name,name,128);
 451                 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
 452                 }
 453         else
 454                 {
 455                 BIO_ghbn_hits++;
 456                 ret= ghbn_cache[i].ent;
 457                 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
 458                 }
 459 end:
 460 #  if 0
 461         CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
 462 #  endif
 463         return(ret);
 464 #endif
 465         }
 466
 467
 468 int BIO_sock_init(void)
 469         {
 470 #ifdef OPENSSL_SYS_WINDOWS
 471         static struct WSAData wsa_state;
 472
 473         if (!wsa_init_done)
 474                 {
 475                 int err;
 476
 477                 wsa_init_done=1;
 478                 memset(&wsa_state,0,sizeof(wsa_state));
 479                 /* Not making wsa_state available to the rest of the
 480                  * code is formally wrong. But the structures we use
 481                  * are [beleived to be] invariable among Winsock DLLs,
 482                  * while API availability is [expected to be] probed
 483                  * at run-time with DSO_global_lookup. */
 484                 if (WSAStartup(0x0202,&wsa_state)!=0)
 485                         {
 486                         err=WSAGetLastError();
 487                         SYSerr(SYS_F_WSASTARTUP,err);
 488                         BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
 489                         return(-1);
 490                         }
 491                 }
 492 #endif /* OPENSSL_SYS_WINDOWS */
 493 #ifdef WATT32
 494         extern int _watt_do_exit;
 495         _watt_do_exit = 0;    /* don't make sock_init() call exit() */
 496         if (sock_init())
 497                 return (-1);
 498 #endif
 499
 500 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 501     WORD wVerReq;
 502     WSADATA wsaData;
 503     int err;
 504
 505     if (!wsa_init_done)
 506     {
 507         wsa_init_done=1;
 508         wVerReq = MAKEWORD( 2, 0 );
 509         err = WSAStartup(wVerReq,&wsaData);
 510         if (err != 0)
 511         {
 512             SYSerr(SYS_F_WSASTARTUP,err);
 513             BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
 514             return(-1);
 515                         }
 516                 }
 517 #endif
 518
 519         return(1);
 520         }
 521
 522 void BIO_sock_cleanup(void)
 523         {
 524 #ifdef OPENSSL_SYS_WINDOWS
 525         if (wsa_init_done)
 526                 {
 527                 wsa_init_done=0;
 528 #if 0           /* this call is claimed to be non-present in Winsock2 */
 529                 WSACancelBlockingCall();
 530 #endif
 531                 WSACleanup();
 532                 }
 533 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 534    if (wsa_init_done)
 535         {
 536         wsa_init_done=0;
 537         WSACleanup();
 538                 }
 539 #endif
 540         }
 541
 542 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
 543
 544 int BIO_socket_ioctl(int fd, long type, void *arg)
 545         {
 546         int i;
 547
 548 #ifdef __DJGPP__
 549         i=ioctlsocket(fd,type,(char *)arg);
 550 #else
 551 # if defined(OPENSSL_SYS_VMS)
 552         /* 2011-02-18 SMS.
 553          * VMS ioctl() can't tolerate a 64-bit "void *arg", but we
 554          * observe that all the consumers pass in an "unsigned long *",
 555          * so we arrange a local copy with a short pointer, and use
 556          * that, instead.
 557          */
 558 #  if __INITIAL_POINTER_SIZE == 64
 559 #   define ARG arg_32p
 560 #   pragma pointer_size save
 561 #   pragma pointer_size 32
 562         unsigned long arg_32;
 563         unsigned long *arg_32p;
 564 #   pragma pointer_size restore
 565         arg_32p = &arg_32;
 566         arg_32 = *((unsigned long *) arg);
 567 #  else /* __INITIAL_POINTER_SIZE == 64 */
 568 #   define ARG arg
 569 #  endif /* __INITIAL_POINTER_SIZE == 64 [else] */
 570 # else /* defined(OPENSSL_SYS_VMS) */
 571 #  define ARG arg
 572 # endif /* defined(OPENSSL_SYS_VMS) [else] */
 573
 574         i=ioctlsocket(fd,type,ARG);
 575 #endif /* __DJGPP__ */
 576         if (i < 0)
 577                 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
 578         return(i);
 579         }
 580 #endif /* __VMS_VER */
 581
 582 /* The reason I have implemented this instead of using sscanf is because
 583  * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
 584 static int get_ip(const char *str, unsigned char ip[4])
 585         {
 586         unsigned int tmp[4];
 587         int num=0,c,ok=0;
 588
 589         tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
 590
 591         for (;;)
 592                 {
 593                 c= *(str++);
 594                 if ((c >= '0') && (c <= '9'))
 595                         {
 596                         ok=1;
 597                         tmp[num]=tmp[num]*10+c-'0';
 598                         if (tmp[num] > 255) return(0);
 599                         }
 600                 else if (c == '.')
 601                         {
 602                         if (!ok) return(-1);
 603                         if (num == 3) return(0);
 604                         num++;
 605                         ok=0;
 606                         }
 607                 else if (c == '\0' && (num == 3) && ok)
 608                         break;
 609                 else
 610                         return(0);
 611                 }
 612         ip[0]=tmp[0];
 613         ip[1]=tmp[1];
 614         ip[2]=tmp[2];
 615         ip[3]=tmp[3];
 616         return(1);
 617         }
 618
 619 int BIO_get_accept_socket(char *host, int bind_mode)
 620         {
 621         int ret=0;
 622         union {
 623                 struct sockaddr sa;
 624                 struct sockaddr_in sa_in;
 625 #if OPENSSL_USE_IPV6
 626                 struct sockaddr_in6 sa_in6;
 627 #endif
 628         } server,client;
 629         int s=INVALID_SOCKET,cs,addrlen;
 630         unsigned char ip[4];
 631         unsigned short port;
 632         char *str=NULL,*e;
 633         char *h,*p;
 634         unsigned long l;
 635         int err_num;
 636
 637         if (BIO_sock_init() != 1) return(INVALID_SOCKET);
 638
 639         if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
 640
 641         h=p=NULL;
 642         h=str;
 643         for (e=str; *e; e++)
 644                 {
 645                 if (*e == ':')
 646                         {
 647                         p=e;
 648                         }
 649                 else if (*e == '/')
 650                         {
 651                         *e='\0';
 652                         break;
 653                         }
 654                 }
 655         if (p)  *p++='\0';      /* points at last ':', '::port' is special [see below] */
 656         else    p=h,h=NULL;
 657
 658 #ifdef EAI_FAMILY
 659         do {
 660         static union {  void *p;
 661                         int (WSAAPI *f)(const char *,const char *,
 662                                  const struct addrinfo *,
 663                                  struct addrinfo **);
 664                         } p_getaddrinfo = {NULL};
 665         static union {  void *p;
 666                         void (WSAAPI *f)(struct addrinfo *);
 667                         } p_freeaddrinfo = {NULL};
 668         struct addrinfo *res,hint;
 669
 670         if (p_getaddrinfo.p==NULL)
 671                 {
 672                 if ((p_getaddrinfo.p=DSO_global_lookup("getaddrinfo"))==NULL ||
 673                     (p_freeaddrinfo.p=DSO_global_lookup("freeaddrinfo"))==NULL)
 674                         p_getaddrinfo.p=(void*)-1;
 675                 }
 676         if (p_getaddrinfo.p==(void *)-1) break;
 677
 678         /* '::port' enforces IPv6 wildcard listener. Some OSes,
 679          * e.g. Solaris, default to IPv6 without any hint. Also
 680          * note that commonly IPv6 wildchard socket can service
 681          * IPv4 connections just as well...  */
 682         memset(&hint,0,sizeof(hint));
 683         hint.ai_flags = AI_PASSIVE;
 684         if (h)
 685                 {
 686                 if (strchr(h,':'))
 687                         {
 688                         if (h[1]=='\0') h=NULL;
 689 #if OPENSSL_USE_IPV6
 690                         hint.ai_family = AF_INET6;
 691 #else
 692                         h=NULL;
 693 #endif
 694                         }
 695                 else if (h[0]=='*' && h[1]=='\0')
 696                         {
 697                         hint.ai_family = AF_INET;
 698                         h=NULL;
 699                         }
 700                 }
 701
 702         if ((*p_getaddrinfo.f)(h,p,&hint,&res)) break;
 703
 704         addrlen = res->ai_addrlen<=sizeof(server) ?
 705                         res->ai_addrlen :
 706                         sizeof(server);
 707         memcpy(&server, res->ai_addr, addrlen);
 708
 709         (*p_freeaddrinfo.f)(res);
 710         goto again;
 711         } while (0);
 712 #endif
 713
 714         if (!BIO_get_port(p,&port)) goto err;
 715
 716         memset((char *)&server,0,sizeof(server));
 717         server.sa_in.sin_family=AF_INET;
 718         server.sa_in.sin_port=htons(port);
 719         addrlen = sizeof(server.sa_in);
 720
 721         if (h == NULL || strcmp(h,"*") == 0)
 722                 server.sa_in.sin_addr.s_addr=INADDR_ANY;
 723         else
 724                 {
 725                 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
 726                 l=(unsigned long)
 727                         ((unsigned long)ip[0]<<24L)|
 728                         ((unsigned long)ip[1]<<16L)|
 729                         ((unsigned long)ip[2]<< 8L)|
 730                         ((unsigned long)ip[3]);
 731                 server.sa_in.sin_addr.s_addr=htonl(l);
 732                 }
 733
 734 again:
 735         s=socket(server.sa.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
 736         if (s == INVALID_SOCKET)
 737                 {
 738                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
 739                 ERR_add_error_data(3,"port='",host,"'");
 740                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
 741                 goto err;
 742                 }
 743
 744 #ifdef SO_REUSEADDR
 745         if (bind_mode == BIO_BIND_REUSEADDR)
 746                 {
 747                 int i=1;
 748
 749                 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
 750                 bind_mode=BIO_BIND_NORMAL;
 751                 }
 752 #endif
 753         if (bind(s,&server.sa,addrlen) == -1)
 754                 {
 755 #ifdef SO_REUSEADDR
 756                 err_num=get_last_socket_error();
 757                 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
 758 #ifdef OPENSSL_SYS_WINDOWS
 759                         /* Some versions of Windows define EADDRINUSE to
 760                          * a dummy value.
 761                          */
 762                         (err_num == WSAEADDRINUSE))
 763 #else
 764                         (err_num == EADDRINUSE))
 765 #endif
 766                         {
 767                         client = server;
 768                         if (h == NULL || strcmp(h,"*") == 0)
 769                                 {
 770 #if OPENSSL_USE_IPV6
 771                                 if (client.sa.sa_family == AF_INET6)
 772                                         {
 773                                         memset(&client.sa_in6.sin6_addr,0,sizeof(client.sa_in6.sin6_addr));
 774                                         client.sa_in6.sin6_addr.s6_addr[15]=1;
 775                                         }
 776                                 else
 777 #endif
 778                                 if (client.sa.sa_family == AF_INET)
 779                                         {
 780                                         client.sa_in.sin_addr.s_addr=htonl(0x7F000001);
 781                                         }
 782                                 else    goto err;
 783                                 }
 784                         cs=socket(client.sa.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
 785                         if (cs != INVALID_SOCKET)
 786                                 {
 787                                 int ii;
 788                                 ii=connect(cs,&client.sa,addrlen);
 789                                 closesocket(cs);
 790                                 if (ii == INVALID_SOCKET)
 791                                         {
 792                                         bind_mode=BIO_BIND_REUSEADDR;
 793                                         closesocket(s);
 794                                         goto again;
 795                                         }
 796                                 /* else error */
 797                                 }
 798                         /* else error */
 799                         }
 800 #endif
 801                 SYSerr(SYS_F_BIND,err_num);
 802                 ERR_add_error_data(3,"port='",host,"'");
 803                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
 804                 goto err;
 805                 }
 806         if (listen(s,MAX_LISTEN) == -1)
 807                 {
 808                 SYSerr(SYS_F_BIND,get_last_socket_error());
 809                 ERR_add_error_data(3,"port='",host,"'");
 810                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
 811                 goto err;
 812                 }
 813         ret=1;
 814 err:
 815         if (str != NULL) OPENSSL_free(str);
 816         if ((ret == 0) && (s != INVALID_SOCKET))
 817                 {
 818                 closesocket(s);
 819                 s= INVALID_SOCKET;
 820                 }
 821         return(s);
 822         }
 823
 824 int BIO_accept(int sock, char **addr)
 825         {
 826         int ret=INVALID_SOCKET;
 827         unsigned long l;
 828         unsigned short port;
 829         char *p;
 830
 831         struct {
 832         /*
 833          * As for following union. Trouble is that there are platforms
 834          * that have socklen_t and there are platforms that don't, on
 835          * some platforms socklen_t is int and on some size_t. So what
 836          * one can do? One can cook #ifdef spaghetti, which is nothing
 837          * but masochistic. Or one can do union between int and size_t.
 838          * One naturally does it primarily for 64-bit platforms where
 839          * sizeof(int) != sizeof(size_t). But would it work? Note that
 840          * if size_t member is initialized to 0, then later int member
 841          * assignment naturally does the job on little-endian platforms
 842          * regardless accept's expectations! What about big-endians?
 843          * If accept expects int*, then it works, and if size_t*, then
 844          * length value would appear as unreasonably large. But this
 845          * won't prevent it from filling in the address structure. The
 846          * trouble of course would be if accept returns more data than
 847          * actual buffer can accomodate and overwrite stack... That's
 848          * where early OPENSSL_assert comes into picture. Besides, the
 849          * only 64-bit big-endian platform found so far that expects
 850          * size_t* is HP-UX, where stack grows towards higher address.
 851          * <appro>
 852          */
 853         union { size_t s; int i; } len;
 854         union {
 855                 struct sockaddr sa;
 856                 struct sockaddr_in sa_in;
 857 #if OPENSSL_USE_IPV6
 858                 struct sockaddr_in6 sa_in6;
 859 #endif
 860                 } from;
 861         } sa;
 862
 863         sa.len.s=0;
 864         sa.len.i=sizeof(sa.from);
 865         memset(&sa.from,0,sizeof(sa.from));
 866         ret=accept(sock,&sa.from.sa,(void *)&sa.len);
 867         if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0)
 868                 {
 869                 OPENSSL_assert(sa.len.s<=sizeof(sa.from));
 870                 sa.len.i = (int)sa.len.s;
 871                 /* use sa.len.i from this point */
 872                 }
 873         if (ret == INVALID_SOCKET)
 874                 {
 875                 if(BIO_sock_should_retry(ret)) return -2;
 876                 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
 877                 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
 878                 goto end;
 879                 }
 880
 881         if (addr == NULL) goto end;
 882
 883 #ifdef EAI_FAMILY
 884         do {
 885         char   h[NI_MAXHOST],s[NI_MAXSERV];
 886         size_t nl;
 887         static union {  void *p;
 888                         int (WSAAPI *f)(const struct sockaddr *,size_t/*socklen_t*/,
 889                                  char *,size_t,char *,size_t,int);
 890                         } p_getnameinfo = {NULL};
 891                         /* 2nd argument to getnameinfo is specified to
 892                          * be socklen_t. Unfortunately there is a number
 893                          * of environments where socklen_t is not defined.
 894                          * As it's passed by value, it's safe to pass it
 895                          * as size_t... <appro> */
 896
 897         if (p_getnameinfo.p==NULL)
 898                 {
 899                 if ((p_getnameinfo.p=DSO_global_lookup("getnameinfo"))==NULL)
 900                         p_getnameinfo.p=(void*)-1;
 901                 }
 902         if (p_getnameinfo.p==(void *)-1) break;
 903
 904         if ((*p_getnameinfo.f)(&sa.from.sa,sa.len.i,h,sizeof(h),s,sizeof(s),
 905             NI_NUMERICHOST|NI_NUMERICSERV)) break;
 906         nl = strlen(h)+strlen(s)+2;
 907         p = *addr;
 908         if (p)  { *p = '\0'; p = OPENSSL_realloc(p,nl); }
 909         else    { p = OPENSSL_malloc(nl);               }
 910         if (p==NULL)
 911                 {
 912                 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
 913                 goto end;
 914                 }
 915         *addr = p;
 916         BIO_snprintf(*addr,nl,"%s:%s",h,s);
 917         goto end;
 918         } while(0);
 919 #endif
 920         if (sa.from.sa.sa_family != AF_INET) goto end;
 921         l=ntohl(sa.from.sa_in.sin_addr.s_addr);
 922         port=ntohs(sa.from.sa_in.sin_port);
 923         if (*addr == NULL)
 924                 {
 925                 if ((p=OPENSSL_malloc(24)) == NULL)
 926                         {
 927                         BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
 928                         goto end;
 929                         }
 930                 *addr=p;
 931                 }
 932         BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d",
 933                      (unsigned char)(l>>24L)&0xff,
 934                      (unsigned char)(l>>16L)&0xff,
 935                      (unsigned char)(l>> 8L)&0xff,
 936                      (unsigned char)(l     )&0xff,
 937                      port);
 938 end:
 939         return(ret);
 940         }
 941
 942 int BIO_set_tcp_ndelay(int s, int on)
 943         {
 944         int ret=0;
 945 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
 946         int opt;
 947
 948 #ifdef SOL_TCP
 949         opt=SOL_TCP;
 950 #else
 951 #ifdef IPPROTO_TCP
 952         opt=IPPROTO_TCP;
 953 #endif
 954 #endif
 955
 956         ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
 957 #endif
 958         return(ret == 0);
 959         }
 960
 961 int BIO_socket_nbio(int s, int mode)
 962         {
 963         int ret= -1;
 964         int l;
 965
 966         l=mode;
 967 #ifdef FIONBIO
 968         ret=BIO_socket_ioctl(s,FIONBIO,&l);
 969 #endif
 970         return(ret == 0);
 971         }
 972 #endif