crypto/bio/b_sock.c

   1 /* crypto/bio/b_sock.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #ifndef NO_SOCK
  60
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <errno.h>
  64 #define USE_SOCKETS
  65 #include "cryptlib.h"
  66 #include <openssl/bio.h>
  67
  68 #ifdef WIN16
  69 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
  70 #else
  71 #define SOCKET_PROTOCOL IPPROTO_TCP
  72 #endif
  73
  74 #ifdef SO_MAXCONN
  75 #define MAX_LISTEN  SOMAXCONN
  76 #elif defined(SO_MAXCONN)
  77 #define MAX_LISTEN  SO_MAXCONN
  78 #else
  79 #define MAX_LISTEN  32
  80 #endif
  81
  82 #ifdef WINDOWS
  83 static int wsa_init_done=0;
  84 #endif
  85
  86 static unsigned long BIO_ghbn_hits=0L;
  87 static unsigned long BIO_ghbn_miss=0L;
  88
  89 #define GHBN_NUM        4
  90 static struct ghbn_cache_st
  91         {
  92         char name[129];
  93         struct hostent *ent;
  94         unsigned long order;
  95         } ghbn_cache[GHBN_NUM];
  96
  97 static int get_ip(const char *str,unsigned char *ip);
  98 static void ghbn_free(struct hostent *a);
  99 static struct hostent *ghbn_dup(struct hostent *a);
 100 int BIO_get_host_ip(const char *str, unsigned char *ip)
 101         {
 102         int i;
 103         int err = 1;
 104         int locked = 0;
 105         struct hostent *he;
 106
 107         i=get_ip(str,ip);
 108         if (i > 0) return(1);
 109         if (i < 0)
 110                 {
 111                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
 112                 goto err;
 113                 }
 114
 115         /* do a gethostbyname */
 116         if (!BIO_sock_init())
 117                 return(0); /* don't generate another error code here */
 118
 119         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
 120         locked = 1;
 121         he=BIO_gethostbyname(str);
 122         if (he == NULL)
 123                 {
 124                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
 125                 goto err;
 126                 }
 127
 128         /* cast to short because of win16 winsock definition */
 129         if ((short)he->h_addrtype != AF_INET)
 130                 {
 131                 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
 132                 goto err;
 133                 }
 134         for (i=0; i<4; i++)
 135                 ip[i]=he->h_addr_list[0][i];
 136         err = 0;
 137
 138  err:
 139         if (locked)
 140                 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
 141         if (err)
 142                 {
 143                 ERR_add_error_data(2,"host=",str);
 144                 return 0;
 145                 }
 146         else
 147                 return 1;
 148         }
 149
 150 int BIO_get_port(const char *str, unsigned short *port_ptr)
 151         {
 152         int i;
 153         struct servent *s;
 154
 155         if (str == NULL)
 156                 {
 157                 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
 158                 return(0);
 159                 }
 160         i=atoi(str);
 161         if (i != 0)
 162                 *port_ptr=(unsigned short)i;
 163         else
 164                 {
 165                 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
 166                 s=getservbyname(str,"tcp");
 167                 if(s != NULL)
 168                         *port_ptr=ntohs((unsigned short)s->s_port);
 169                 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
 170                 if(s == NULL)
 171                         {
 172                         if (strcmp(str,"http") == 0)
 173                                 *port_ptr=80;
 174                         else if (strcmp(str,"telnet") == 0)
 175                                 *port_ptr=23;
 176                         else if (strcmp(str,"socks") == 0)
 177                                 *port_ptr=1080;
 178                         else if (strcmp(str,"https") == 0)
 179                                 *port_ptr=443;
 180                         else if (strcmp(str,"ssl") == 0)
 181                                 *port_ptr=443;
 182                         else if (strcmp(str,"ftp") == 0)
 183                                 *port_ptr=21;
 184                         else if (strcmp(str,"gopher") == 0)
 185                                 *port_ptr=70;
 186 #if 0
 187                         else if (strcmp(str,"wais") == 0)
 188                                 *port_ptr=21;
 189 #endif
 190                         else
 191                                 {
 192                                 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
 193                                 ERR_add_error_data(3,"service='",str,"'");
 194                                 return(0);
 195                                 }
 196                         }
 197                 }
 198         return(1);
 199         }
 200
 201 int BIO_sock_error(int sock)
 202         {
 203         int j,i;
 204         int size;
 205
 206         size=sizeof(int);
 207         /* Note: under Windows the third parameter is of type (char *)
 208          * whereas under other systems it is (void *) if you don't have
 209          * a cast it will choke the compiler: if you do have a cast then
 210          * you can either go for (char *) or (void *).
 211          */
 212         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
 213         if (i < 0)
 214                 return(1);
 215         else
 216                 return(j);
 217         }
 218
 219 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
 220         {
 221         int i;
 222         char **p;
 223
 224         switch (cmd)
 225                 {
 226         case BIO_GHBN_CTRL_HITS:
 227                 return(BIO_ghbn_hits);
 228                 /* break; */
 229         case BIO_GHBN_CTRL_MISSES:
 230                 return(BIO_ghbn_miss);
 231                 /* break; */
 232         case BIO_GHBN_CTRL_CACHE_SIZE:
 233                 return(GHBN_NUM);
 234                 /* break; */
 235         case BIO_GHBN_CTRL_GET_ENTRY:
 236                 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
 237                         (ghbn_cache[iarg].order > 0))
 238                         {
 239                         p=(char **)parg;
 240                         if (p == NULL) return(0);
 241                         *p=ghbn_cache[iarg].name;
 242                         ghbn_cache[iarg].name[128]='\0';
 243                         return(1);
 244                         }
 245                 return(0);
 246                 /* break; */
 247         case BIO_GHBN_CTRL_FLUSH:
 248                 for (i=0; i<GHBN_NUM; i++)
 249                         ghbn_cache[i].order=0;
 250                 break;
 251         default:
 252                 return(0);
 253                 }
 254         return(1);
 255         }
 256
 257 static struct hostent *ghbn_dup(struct hostent *a)
 258         {
 259         struct hostent *ret;
 260         int i,j;
 261
 262         MemCheck_off();
 263         ret=(struct hostent *)Malloc(sizeof(struct hostent));
 264         if (ret == NULL) return(NULL);
 265         memset(ret,0,sizeof(struct hostent));
 266
 267         for (i=0; a->h_aliases[i] != NULL; i++)
 268                 ;
 269         i++;
 270         ret->h_aliases = (char **)Malloc(i*sizeof(char *));
 271         if (ret->h_aliases == NULL)
 272                 goto err;
 273         memset(ret->h_aliases, 0, i*sizeof(char *));
 274
 275         for (i=0; a->h_addr_list[i] != NULL; i++)
 276                 ;
 277         i++;
 278         ret->h_addr_list=(char **)Malloc(i*sizeof(char *));
 279         if (ret->h_addr_list == NULL)
 280                 goto err;
 281         memset(ret->h_addr_list, 0, i*sizeof(char *));
 282
 283         j=strlen(a->h_name)+1;
 284         if ((ret->h_name=Malloc(j)) == NULL) goto err;
 285         memcpy((char *)ret->h_name,a->h_name,j);
 286         for (i=0; a->h_aliases[i] != NULL; i++)
 287                 {
 288                 j=strlen(a->h_aliases[i])+1;
 289                 if ((ret->h_aliases[i]=Malloc(j)) == NULL) goto err;
 290                 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
 291                 }
 292         ret->h_length=a->h_length;
 293         ret->h_addrtype=a->h_addrtype;
 294         for (i=0; a->h_addr_list[i] != NULL; i++)
 295                 {
 296                 if ((ret->h_addr_list[i]=Malloc(a->h_length)) == NULL)
 297                         goto err;
 298                 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
 299                 }
 300         if (0)
 301                 {
 302 err:
 303                 if (ret != NULL)
 304                         ghbn_free(ret);
 305                 ret=NULL;
 306                 }
 307         MemCheck_on();
 308         return(ret);
 309         }
 310
 311 static void ghbn_free(struct hostent *a)
 312         {
 313         int i;
 314
 315         if(a == NULL)
 316             return;
 317
 318         if (a->h_aliases != NULL)
 319                 {
 320                 for (i=0; a->h_aliases[i] != NULL; i++)
 321                         Free(a->h_aliases[i]);
 322                 Free(a->h_aliases);
 323                 }
 324         if (a->h_addr_list != NULL)
 325                 {
 326                 for (i=0; a->h_addr_list[i] != NULL; i++)
 327                         Free(a->h_addr_list[i]);
 328                 Free(a->h_addr_list);
 329                 }
 330         if (a->h_name != NULL) Free((char *)a->h_name);
 331         Free(a);
 332         }
 333
 334 struct hostent *BIO_gethostbyname(const char *name)
 335         {
 336         struct hostent *ret;
 337         int i,lowi=0,j;
 338         unsigned long low= (unsigned long)-1;
 339
 340 /*      return(gethostbyname(name)); */
 341
 342 #if 0 /* It doesn't make sense to use locking here: The function interface
 343            * is not thread-safe, because threads can never be sure when
 344            * some other thread destroys the data they were given a pointer to.
 345            */
 346         CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
 347 #endif
 348         j=strlen(name);
 349         if (j < 128)
 350                 {
 351                 for (i=0; i<GHBN_NUM; i++)
 352                         {
 353                         if (low > ghbn_cache[i].order)
 354                                 {
 355                                 low=ghbn_cache[i].order;
 356                                 lowi=i;
 357                                 }
 358                         if (ghbn_cache[i].order > 0)
 359                                 {
 360                                 if (strncmp(name,ghbn_cache[i].name,128) == 0)
 361                                         break;
 362                                 }
 363                         }
 364                 }
 365         else
 366                 i=GHBN_NUM;
 367
 368         if (i == GHBN_NUM) /* no hit*/
 369                 {
 370                 BIO_ghbn_miss++;
 371                 ret=gethostbyname(name);
 372
 373                 if (ret == NULL)
 374                         goto end;
 375                 if (j > 128) /* too big to cache */
 376                         {
 377 #if 0 /* If we were trying to make this function thread-safe (which
 378            * is bound to fail), we'd have to give up in this case
 379            * (or allocate more memory). */
 380                         ret = NULL;
 381 #endif
 382                         goto end;
 383                         }
 384
 385                 /* else add to cache */
 386                 if (ghbn_cache[lowi].ent != NULL)
 387                         ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
 388                 ghbn_cache[lowi].name[0] = '\0';
 389
 390                 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
 391                         {
 392                         BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
 393                         goto end;
 394                         }
 395                 strncpy(ghbn_cache[lowi].name,name,128);
 396                 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
 397                 }
 398         else
 399                 {
 400                 BIO_ghbn_hits++;
 401                 ret= ghbn_cache[i].ent;
 402                 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
 403                 }
 404 end:
 405 #if 0
 406         CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
 407 #endif
 408         return(ret);
 409         }
 410
 411 int BIO_sock_init(void)
 412         {
 413 #ifdef WINDOWS
 414         static struct WSAData wsa_state;
 415
 416         if (!wsa_init_done)
 417                 {
 418                 int err;
 419
 420 #ifdef SIGINT
 421                 signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
 422 #endif
 423                 wsa_init_done=1;
 424                 memset(&wsa_state,0,sizeof(wsa_state));
 425                 if (WSAStartup(0x0101,&wsa_state)!=0)
 426                         {
 427                         err=WSAGetLastError();
 428                         SYSerr(SYS_F_WSASTARTUP,err);
 429                         BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
 430                         return(-1);
 431                         }
 432                 }
 433 #endif /* WINDOWS */
 434         return(1);
 435         }
 436
 437 void BIO_sock_cleanup(void)
 438         {
 439 #ifdef WINDOWS
 440         if (wsa_init_done)
 441                 {
 442                 wsa_init_done=0;
 443                 WSACancelBlockingCall();
 444                 WSACleanup();
 445                 }
 446 #endif
 447         }
 448
 449 #if !defined(VMS) || __VMS_VER >= 70000000
 450
 451 int BIO_socket_ioctl(int fd, long type, unsigned long *arg)
 452         {
 453         int i;
 454
 455         i=ioctlsocket(fd,type,arg);
 456         if (i < 0)
 457                 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
 458         return(i);
 459         }
 460 #endif /* __VMS_VER */
 461
 462 /* The reason I have implemented this instead of using sscanf is because
 463  * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
 464 static int get_ip(const char *str, unsigned char ip[4])
 465         {
 466         unsigned int tmp[4];
 467         int num=0,c,ok=0;
 468
 469         tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
 470
 471         for (;;)
 472                 {
 473                 c= *(str++);
 474                 if ((c >= '0') && (c <= '9'))
 475                         {
 476                         ok=1;
 477                         tmp[num]=tmp[num]*10+c-'0';
 478                         if (tmp[num] > 255) return(-1);
 479                         }
 480                 else if (c == '.')
 481                         {
 482                         if (!ok) return(-1);
 483                         if (num == 3) break;
 484                         num++;
 485                         ok=0;
 486                         }
 487                 else if ((num == 3) && ok)
 488                         break;
 489                 else
 490                         return(0);
 491                 }
 492         ip[0]=tmp[0];
 493         ip[1]=tmp[1];
 494         ip[2]=tmp[2];
 495         ip[3]=tmp[3];
 496         return(1);
 497         }
 498
 499 int BIO_get_accept_socket(char *host, int bind_mode)
 500         {
 501         int ret=0;
 502         struct sockaddr_in server,client;
 503         int s= -1,cs;
 504         unsigned char ip[4];
 505         unsigned short port;
 506         char *str,*e;
 507         const char *h,*p;
 508         unsigned long l;
 509         int err_num;
 510
 511         if (!BIO_sock_init()) return(INVALID_SOCKET);
 512
 513         if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
 514
 515         h=p=NULL;
 516         h=str;
 517         for (e=str; *e; e++)
 518                 {
 519                 if (*e == ':')
 520                         {
 521                         p= &(e[1]);
 522                         *e='\0';
 523                         }
 524                 else if (*e == '/')
 525                         {
 526                         *e='\0';
 527                         break;
 528                         }
 529                 }
 530
 531         if (p == NULL)
 532                 {
 533                 p=h;
 534                 h="*";
 535                 }
 536
 537         if (!BIO_get_port(p,&port)) return(INVALID_SOCKET);
 538
 539         memset((char *)&server,0,sizeof(server));
 540         server.sin_family=AF_INET;
 541         server.sin_port=htons(port);
 542
 543         if (strcmp(h,"*") == 0)
 544                 server.sin_addr.s_addr=INADDR_ANY;
 545         else
 546                 {
 547                 if (!BIO_get_host_ip(h,&(ip[0]))) return(INVALID_SOCKET);
 548                 l=(unsigned long)
 549                         ((unsigned long)ip[0]<<24L)|
 550                         ((unsigned long)ip[1]<<16L)|
 551                         ((unsigned long)ip[2]<< 8L)|
 552                         ((unsigned long)ip[3]);
 553                 server.sin_addr.s_addr=htonl(l);
 554                 }
 555
 556 again:
 557         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 558         if (s == INVALID_SOCKET)
 559                 {
 560                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
 561                 ERR_add_error_data(3,"port='",host,"'");
 562                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
 563                 goto err;
 564                 }
 565
 566 #ifdef SO_REUSEADDR
 567         if (bind_mode == BIO_BIND_REUSEADDR)
 568                 {
 569                 int i=1;
 570
 571                 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
 572                 bind_mode=BIO_BIND_NORMAL;
 573                 }
 574 #endif
 575         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 576                 {
 577 #ifdef SO_REUSEADDR
 578                 err_num=get_last_socket_error();
 579                 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
 580                         (err_num == EADDRINUSE))
 581                         {
 582                         memcpy((char *)&client,(char *)&server,sizeof(server));
 583                         if (strcmp(h,"*") == 0)
 584                                 client.sin_addr.s_addr=htonl(0x7F000001);
 585                         cs=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 586                         if (cs != INVALID_SOCKET)
 587                                 {
 588                                 int ii;
 589                                 ii=connect(cs,(struct sockaddr *)&client,
 590                                         sizeof(client));
 591                                 closesocket(cs);
 592                                 if (ii == INVALID_SOCKET)
 593                                         {
 594                                         bind_mode=BIO_BIND_REUSEADDR;
 595                                         closesocket(s);
 596                                         goto again;
 597                                         }
 598                                 /* else error */
 599                                 }
 600                         /* else error */
 601                         }
 602 #endif
 603                 SYSerr(SYS_F_BIND,err_num);
 604                 ERR_add_error_data(3,"port='",host,"'");
 605                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
 606                 goto err;
 607                 }
 608         if (listen(s,MAX_LISTEN) == -1)
 609                 {
 610                 SYSerr(SYS_F_BIND,get_last_socket_error());
 611                 ERR_add_error_data(3,"port='",host,"'");
 612                 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
 613                 goto err;
 614                 }
 615         ret=1;
 616 err:
 617         if (str != NULL) Free(str);
 618         if ((ret == 0) && (s != INVALID_SOCKET))
 619                 {
 620                 closesocket(s);
 621                 s= INVALID_SOCKET;
 622                 }
 623         return(s);
 624         }
 625
 626 int BIO_accept(int sock, char **addr)
 627         {
 628         int ret=INVALID_SOCKET;
 629         static struct sockaddr_in from;
 630         unsigned long l;
 631         unsigned short port;
 632         int len;
 633         char *p;
 634
 635         memset((char *)&from,0,sizeof(from));
 636         len=sizeof(from);
 637         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
 638          * of type (int *) whereas under other systems it is (void *) if
 639          * you don't have a cast it will choke the compiler: if you do
 640          * have a cast then you can either go for (int *) or (void *).
 641          */
 642         ret=accept(sock,(struct sockaddr *)&from,(void *)&len);
 643         if (ret == INVALID_SOCKET)
 644                 {
 645                 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
 646                 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
 647                 goto end;
 648                 }
 649
 650         if (addr == NULL) goto end;
 651
 652         l=ntohl(from.sin_addr.s_addr);
 653         port=ntohs(from.sin_port);
 654         if (*addr == NULL)
 655                 {
 656                 if ((p=Malloc(24)) == NULL)
 657                         {
 658                         BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
 659                         goto end;
 660                         }
 661                 *addr=p;
 662                 }
 663         sprintf(*addr,"%d.%d.%d.%d:%d",
 664                 (unsigned char)(l>>24L)&0xff,
 665                 (unsigned char)(l>>16L)&0xff,
 666                 (unsigned char)(l>> 8L)&0xff,
 667                 (unsigned char)(l     )&0xff,
 668                 port);
 669 end:
 670         return(ret);
 671         }
 672
 673 int BIO_set_tcp_ndelay(int s, int on)
 674         {
 675         int ret=0;
 676 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
 677         int opt;
 678
 679 #ifdef SOL_TCP
 680         opt=SOL_TCP;
 681 #else
 682 #ifdef IPPROTO_TCP
 683         opt=IPPROTO_TCP;
 684 #endif
 685 #endif
 686
 687         ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
 688 #endif
 689         return(ret == 0);
 690         }
 691 #endif
 692
 693 int BIO_socket_nbio(int s, int mode)
 694         {
 695         int ret= -1;
 696         unsigned long l;
 697
 698         l=mode;
 699 #ifdef FIONBIO
 700         ret=BIO_socket_ioctl(s,FIONBIO,&l);
 701 #endif
 702         return(ret == 0);
 703         }