apps/s_socket.c

   1 /* apps/s_socket.c -  socket-related functions used by s_client and s_server */
   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 <string.h>
  62 #include <errno.h>
  63 #include <signal.h>
  64
  65 /* With IPv6, it looks like Digital has mixed up the proper order of
  66    recursive header file inclusion, resulting in the compiler complaining
  67    that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
  68    is needed to have fileno() declared correctly...  So let's define u_int */
  69 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
  70 #define __U_INT
  71 typedef unsigned int u_int;
  72 #endif
  73
  74 #define USE_SOCKETS
  75 #define NON_MAIN
  76 #include "apps.h"
  77 #undef USE_SOCKETS
  78 #undef NON_MAIN
  79 #include "s_apps.h"
  80 #include <openssl/ssl.h>
  81
  82 #ifdef FLAT_INC
  83 #include "e_os.h"
  84 #else
  85 #include "../e_os.h"
  86 #endif
  87
  88 #ifndef OPENSSL_NO_SOCK
  89
  90 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
  91 #include "netdb.h"
  92 #endif
  93
  94 static struct hostent *GetHostByName(const char *name);
  95 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
  96 static void ssl_sock_cleanup(void);
  97 #endif
  98 static int ssl_sock_init(void);
  99 static int init_client_ip(int *sock, const unsigned char ip[4], int port,
 100                           int type);
 101 static int init_server(int *sock, int port, int type);
 102 static int init_server_long(int *sock, int port,char *ip, int type);
 103 static int do_accept(int acc_sock, int *sock, char **host);
 104 static int host_ip(const char *str, unsigned char ip[4]);
 105 #ifndef NO_SYS_UN_H
 106 static int init_server_unix(int *sock, const char *path);
 107 static int do_accept_unix(int acc_sock, int *sock);
 108 #endif
 109
 110 #ifdef OPENSSL_SYS_WIN16
 111 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
 112 #else
 113 #define SOCKET_PROTOCOL IPPROTO_TCP
 114 #endif
 115
 116 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 117 static int wsa_init_done=0;
 118 #endif
 119
 120 #ifdef OPENSSL_SYS_WINDOWS
 121 static struct WSAData wsa_state;
 122 static int wsa_init_done=0;
 123
 124 #ifdef OPENSSL_SYS_WIN16
 125 static HWND topWnd=0;
 126 static FARPROC lpTopWndProc=NULL;
 127 static FARPROC lpTopHookProc=NULL;
 128 extern HINSTANCE _hInstance;  /* nice global CRT provides */
 129
 130 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
 131              LPARAM lParam)
 132         {
 133         if (hwnd == topWnd)
 134                 {
 135                 switch(message)
 136                         {
 137                 case WM_DESTROY:
 138                 case WM_CLOSE:
 139                         SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
 140                         ssl_sock_cleanup();
 141                         break;
 142                         }
 143                 }
 144         return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
 145         }
 146
 147 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
 148         {
 149         topWnd=hwnd;
 150         return(FALSE);
 151         }
 152
 153 #endif /* OPENSSL_SYS_WIN32 */
 154 #endif /* OPENSSL_SYS_WINDOWS */
 155
 156 #ifdef OPENSSL_SYS_WINDOWS
 157 static void ssl_sock_cleanup(void)
 158         {
 159         if (wsa_init_done)
 160                 {
 161                 wsa_init_done=0;
 162 #ifndef OPENSSL_SYS_WINCE
 163                 WSACancelBlockingCall();
 164 #endif
 165                 WSACleanup();
 166                 }
 167         }
 168 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 169 static void sock_cleanup(void)
 170     {
 171     if (wsa_init_done)
 172         {
 173         wsa_init_done=0;
 174                 WSACleanup();
 175                 }
 176         }
 177 #endif
 178
 179 static int ssl_sock_init(void)
 180         {
 181 #if defined(OPENSSL_SYS_WINDOWS)
 182         if (!wsa_init_done)
 183                 {
 184                 int err;
 185
 186 #ifdef SIGINT
 187                 signal(SIGINT,(void (*)(int))ssl_sock_cleanup);
 188 #endif
 189                 wsa_init_done=1;
 190                 memset(&wsa_state,0,sizeof(wsa_state));
 191                 if (WSAStartup(0x0101,&wsa_state)!=0)
 192                         {
 193                         err=WSAGetLastError();
 194                         BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
 195                         return(0);
 196                         }
 197
 198 #ifdef OPENSSL_SYS_WIN16
 199                 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
 200                 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
 201                 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
 202
 203                 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
 204 #endif /* OPENSSL_SYS_WIN16 */
 205                 }
 206 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 207    WORD wVerReq;
 208    WSADATA wsaData;
 209    int err;
 210
 211    if (!wsa_init_done)
 212       {
 213
 214 # ifdef SIGINT
 215       signal(SIGINT,(void (*)(int))sock_cleanup);
 216 # endif
 217
 218       wsa_init_done=1;
 219       wVerReq = MAKEWORD( 2, 0 );
 220       err = WSAStartup(wVerReq,&wsaData);
 221       if (err != 0)
 222          {
 223          BIO_printf(bio_err,"unable to start WINSOCK2, error code=%d\n",err);
 224          return(0);
 225          }
 226       }
 227 #endif /* OPENSSL_SYS_WINDOWS */
 228         return(1);
 229         }
 230
 231 int init_client(int *sock, const char *host, int port, int type)
 232         {
 233         unsigned char ip[4];
 234
 235         ip[0] = ip[1] = ip[2] = ip[3] = 0;
 236         if (!host_ip(host,&(ip[0])))
 237                 return 0;
 238         return init_client_ip(sock,ip,port,type);
 239         }
 240
 241 static int init_client_ip(int *sock, const unsigned char ip[4], int port,
 242                           int type)
 243         {
 244         unsigned long addr;
 245         struct sockaddr_in them;
 246         int s,i;
 247
 248         if (!ssl_sock_init()) return(0);
 249
 250         memset((char *)&them,0,sizeof(them));
 251         them.sin_family=AF_INET;
 252         them.sin_port=htons((unsigned short)port);
 253         addr=(unsigned long)
 254                 ((unsigned long)ip[0]<<24L)|
 255                 ((unsigned long)ip[1]<<16L)|
 256                 ((unsigned long)ip[2]<< 8L)|
 257                 ((unsigned long)ip[3]);
 258         them.sin_addr.s_addr=htonl(addr);
 259
 260         if (type == SOCK_STREAM)
 261                 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 262         else /* ( type == SOCK_DGRAM) */
 263                 s=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
 264
 265         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 266
 267 #if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE)
 268         if (type == SOCK_STREAM)
 269                 {
 270                 i=0;
 271                 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 272                 if (i < 0) { closesocket(s); perror("keepalive"); return(0); }
 273                 }
 274 #endif
 275
 276         if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
 277                 { closesocket(s); perror("connect"); return(0); }
 278         *sock=s;
 279         return(1);
 280         }
 281
 282 #ifndef NO_SYS_UN_H
 283 int init_client_unix(int *sock, const char *server)
 284         {
 285         struct sockaddr_un them;
 286         int s;
 287
 288         if (strlen(server) > (UNIX_PATH_MAX + 1)) return(0);
 289         if (!ssl_sock_init()) return(0);
 290
 291         s=socket(AF_UNIX, SOCK_STREAM, 0);
 292         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 293
 294         memset((char *)&them,0,sizeof(them));
 295         them.sun_family=AF_UNIX;
 296         strcpy(them.sun_path, server);
 297
 298         if (connect(s, (struct sockaddr *)&them, sizeof(them)) == -1)
 299                 { closesocket(s); perror("connect"); return(0); }
 300         *sock=s;
 301         return(1);
 302         }
 303 #endif
 304
 305 int do_server(int port, int type, int *ret,
 306               int (*cb)(char *hostname, int s, int stype, unsigned char *context),
 307               unsigned char *context, int naccept)
 308         {
 309         int sock;
 310         char *name = NULL;
 311         int accept_socket = 0;
 312         int i;
 313
 314         if (!init_server(&accept_socket,port,type)) return(0);
 315
 316         if (ret != NULL)
 317                 {
 318                 *ret=accept_socket;
 319                 /* return(1);*/
 320                 }
 321         for (;;)
 322                 {
 323                 if (type==SOCK_STREAM)
 324                         {
 325 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
 326                         if (do_accept(accept_socket,&sock,NULL) == 0)
 327 #else
 328                         if (do_accept(accept_socket,&sock,&name) == 0)
 329 #endif
 330                                 {
 331                                 SHUTDOWN(accept_socket);
 332                                 return(0);
 333                                 }
 334                         }
 335                 else
 336                         sock = accept_socket;
 337                 i=(*cb)(name,sock, type, context);
 338                 if (name != NULL) OPENSSL_free(name);
 339                 if (type==SOCK_STREAM)
 340                         SHUTDOWN2(sock);
 341                 if (naccept != -1)
 342                         naccept--;
 343                 if (i < 0 || naccept == 0)
 344                         {
 345                         SHUTDOWN2(accept_socket);
 346                         return(i);
 347                         }
 348                 }
 349         }
 350
 351 #ifndef NO_SYS_UN_H
 352 int do_server_unix(const char *path, int *ret,
 353                    int (*cb)(char *hostname, int s, int stype, unsigned char *context),
 354                    unsigned char *context, int naccept)
 355         {
 356         int sock;
 357         int accept_socket = 0;
 358         int i;
 359
 360         if (!init_server_unix(&accept_socket, path)) return(0);
 361
 362         if (ret != NULL)
 363                 *ret=accept_socket;
 364         for (;;)
 365                 {
 366                 if (do_accept_unix(accept_socket, &sock) == 0)
 367                         {
 368                         SHUTDOWN(accept_socket);
 369                         i = 0;
 370                         goto out;
 371                         }
 372                 i=(*cb)(NULL, sock, 0, context);
 373                 SHUTDOWN2(sock);
 374                 if (naccept != -1)
 375                         naccept--;
 376                 if (i < 0 || naccept == 0)
 377                         {
 378                         SHUTDOWN2(accept_socket);
 379                         goto out;
 380                         }
 381                 }
 382 out:
 383         unlink(path);
 384         return(i);
 385         }
 386 #endif
 387
 388 static int init_server_long(int *sock, int port, char *ip, int type)
 389         {
 390         int ret=0;
 391         struct sockaddr_in server;
 392         int s= -1;
 393
 394         if (!ssl_sock_init()) return(0);
 395
 396         memset((char *)&server,0,sizeof(server));
 397         server.sin_family=AF_INET;
 398         server.sin_port=htons((unsigned short)port);
 399         if (ip == NULL)
 400                 server.sin_addr.s_addr=INADDR_ANY;
 401         else
 402 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
 403 #ifndef BIT_FIELD_LIMITS
 404                 memcpy(&server.sin_addr.s_addr,ip,4);
 405 #else
 406                 memcpy(&server.sin_addr,ip,4);
 407 #endif
 408
 409                 if (type == SOCK_STREAM)
 410                         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 411                 else /* type == SOCK_DGRAM */
 412                         s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
 413
 414         if (s == INVALID_SOCKET) goto err;
 415 #if defined SOL_SOCKET && defined SO_REUSEADDR
 416                 {
 417                 int j = 1;
 418                 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
 419                            (void *) &j, sizeof j);
 420                 }
 421 #endif
 422         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 423                 {
 424 #ifndef OPENSSL_SYS_WINDOWS
 425                 perror("bind");
 426 #endif
 427                 goto err;
 428                 }
 429         /* Make it 128 for linux */
 430         if (type==SOCK_STREAM && listen(s,128) == -1) goto err;
 431         *sock=s;
 432         ret=1;
 433 err:
 434         if ((ret == 0) && (s != -1))
 435                 {
 436                 SHUTDOWN(s);
 437                 }
 438         return(ret);
 439         }
 440
 441 static int init_server(int *sock, int port, int type)
 442         {
 443         return(init_server_long(sock, port, NULL, type));
 444         }
 445
 446 #ifndef NO_SYS_UN_H
 447 static int init_server_unix(int *sock, const char *path)
 448         {
 449         int ret = 0;
 450         struct sockaddr_un server;
 451         int s = -1;
 452
 453         if (strlen(path) > (UNIX_PATH_MAX + 1)) return(0);
 454         if (!ssl_sock_init()) return(0);
 455
 456         s=socket(AF_UNIX, SOCK_STREAM, 0);
 457         if (s == INVALID_SOCKET) goto err;
 458
 459         memset((char *)&server,0,sizeof(server));
 460         server.sun_family=AF_UNIX;
 461         strcpy(server.sun_path, path);
 462
 463         if (bind(s, (struct sockaddr *)&server, sizeof(server)) == -1)
 464                 {
 465 #ifndef OPENSSL_SYS_WINDOWS
 466                 perror("bind");
 467 #endif
 468                 goto err;
 469                 }
 470         /* Make it 128 for linux */
 471         if (listen(s,128) == -1)
 472                 {
 473 #ifndef OPENSSL_SYS_WINDOWS
 474                 perror("listen");
 475 #endif
 476                 unlink(path);
 477                 goto err;
 478                 }
 479         *sock=s;
 480         ret=1;
 481 err:
 482         if ((ret == 0) && (s != -1))
 483                 {
 484                 SHUTDOWN(s);
 485                 }
 486         return(ret);
 487         }
 488 #endif
 489
 490 static int do_accept(int acc_sock, int *sock, char **host)
 491         {
 492         int ret;
 493         struct hostent *h1,*h2;
 494         static struct sockaddr_in from;
 495         int len;
 496 /*      struct linger ling; */
 497
 498         if (!ssl_sock_init()) return(0);
 499
 500 #ifndef OPENSSL_SYS_WINDOWS
 501 redoit:
 502 #endif
 503
 504         memset((char *)&from,0,sizeof(from));
 505         len=sizeof(from);
 506         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
 507          * of type (int *) whereas under other systems it is (void *) if
 508          * you don't have a cast it will choke the compiler: if you do
 509          * have a cast then you can either go for (int *) or (void *).
 510          */
 511         ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
 512         if (ret == INVALID_SOCKET)
 513                 {
 514 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
 515                 int i;
 516                 i=WSAGetLastError();
 517                 BIO_printf(bio_err,"accept error %d\n",i);
 518 #else
 519                 if (errno == EINTR)
 520                         {
 521                         /*check_timeout(); */
 522                         goto redoit;
 523                         }
 524                 fprintf(stderr,"errno=%d ",errno);
 525                 perror("accept");
 526 #endif
 527                 return(0);
 528                 }
 529
 530 /*
 531         ling.l_onoff=1;
 532         ling.l_linger=0;
 533         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 534         if (i < 0) { perror("linger"); return(0); }
 535         i=0;
 536         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 537         if (i < 0) { perror("keepalive"); return(0); }
 538 */
 539
 540         if (host == NULL) goto end;
 541 #ifndef BIT_FIELD_LIMITS
 542         /* I should use WSAAsyncGetHostByName() under windows */
 543         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 544                 sizeof(from.sin_addr.s_addr),AF_INET);
 545 #else
 546         h1=gethostbyaddr((char *)&from.sin_addr,
 547                 sizeof(struct in_addr),AF_INET);
 548 #endif
 549         if (h1 == NULL)
 550                 {
 551                 BIO_printf(bio_err,"bad gethostbyaddr\n");
 552                 *host=NULL;
 553                 /* return(0); */
 554                 }
 555         else
 556                 {
 557                 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
 558                         {
 559                         perror("OPENSSL_malloc");
 560                         closesocket(ret);
 561                         return(0);
 562                         }
 563                 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1);
 564
 565                 h2=GetHostByName(*host);
 566                 if (h2 == NULL)
 567                         {
 568                         BIO_printf(bio_err,"gethostbyname failure\n");
 569                         closesocket(ret);
 570                         return(0);
 571                         }
 572                 if (h2->h_addrtype != AF_INET)
 573                         {
 574                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 575                         closesocket(ret);
 576                         return(0);
 577                         }
 578                 }
 579 end:
 580         *sock=ret;
 581         return(1);
 582         }
 583
 584 #ifndef NO_SYS_UN_H
 585 static int do_accept_unix(int acc_sock, int *sock)
 586         {
 587         int ret;
 588
 589         if (!ssl_sock_init()) return(0);
 590
 591 redoit:
 592         ret=accept(acc_sock, NULL, NULL);
 593         if (ret == INVALID_SOCKET)
 594                 {
 595                 if (errno == EINTR)
 596                         {
 597                         /*check_timeout(); */
 598                         goto redoit;
 599                         }
 600                 fprintf(stderr,"errno=%d ",errno);
 601                 perror("accept");
 602                 return(0);
 603                 }
 604
 605         *sock=ret;
 606         return(1);
 607         }
 608 #endif
 609
 610 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
 611              short *port_ptr)
 612         {
 613         char *h,*p;
 614
 615         h=str;
 616         p=strchr(str,':');
 617         if (p == NULL)
 618                 {
 619                 BIO_printf(bio_err,"no port defined\n");
 620                 return(0);
 621                 }
 622         *(p++)='\0';
 623
 624         if ((ip != NULL) && !host_ip(str,ip))
 625                 goto err;
 626         if (host_ptr != NULL) *host_ptr=h;
 627
 628         if (!extract_port(p,port_ptr))
 629                 goto err;
 630         return(1);
 631 err:
 632         return(0);
 633         }
 634
 635 static int host_ip(const char *str, unsigned char ip[4])
 636         {
 637         unsigned int in[4];
 638         int i;
 639
 640         if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
 641                 {
 642                 for (i=0; i<4; i++)
 643                         if (in[i] > 255)
 644                                 {
 645                                 BIO_printf(bio_err,"invalid IP address\n");
 646                                 goto err;
 647                                 }
 648                 ip[0]=in[0];
 649                 ip[1]=in[1];
 650                 ip[2]=in[2];
 651                 ip[3]=in[3];
 652                 }
 653         else
 654                 { /* do a gethostbyname */
 655                 struct hostent *he;
 656
 657                 if (!ssl_sock_init()) return(0);
 658
 659                 he=GetHostByName(str);
 660                 if (he == NULL)
 661                         {
 662                         BIO_printf(bio_err,"gethostbyname failure\n");
 663                         goto err;
 664                         }
 665                 /* cast to short because of win16 winsock definition */
 666                 if ((short)he->h_addrtype != AF_INET)
 667                         {
 668                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 669                         return(0);
 670                         }
 671                 ip[0]=he->h_addr_list[0][0];
 672                 ip[1]=he->h_addr_list[0][1];
 673                 ip[2]=he->h_addr_list[0][2];
 674                 ip[3]=he->h_addr_list[0][3];
 675                 }
 676         return(1);
 677 err:
 678         return(0);
 679         }
 680
 681 int extract_port(const char *str, short *port_ptr)
 682         {
 683         int i;
 684         struct servent *s;
 685
 686         i=atoi(str);
 687         if (i != 0)
 688                 *port_ptr=(unsigned short)i;
 689         else
 690                 {
 691                 s=getservbyname(str,"tcp");
 692                 if (s == NULL)
 693                         {
 694                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 695                         return(0);
 696                         }
 697                 *port_ptr=ntohs((unsigned short)s->s_port);
 698                 }
 699         return(1);
 700         }
 701
 702 #define GHBN_NUM        4
 703 static struct ghbn_cache_st
 704         {
 705         char name[128];
 706         struct hostent ent;
 707         unsigned long order;
 708         } ghbn_cache[GHBN_NUM];
 709
 710 static unsigned long ghbn_hits=0L;
 711 static unsigned long ghbn_miss=0L;
 712
 713 static struct hostent *GetHostByName(const char *name)
 714         {
 715         struct hostent *ret;
 716         int i,lowi=0;
 717         unsigned long low= (unsigned long)-1;
 718
 719         for (i=0; i<GHBN_NUM; i++)
 720                 {
 721                 if (low > ghbn_cache[i].order)
 722                         {
 723                         low=ghbn_cache[i].order;
 724                         lowi=i;
 725                         }
 726                 if (ghbn_cache[i].order > 0)
 727                         {
 728                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
 729                                 break;
 730                         }
 731                 }
 732         if (i == GHBN_NUM) /* no hit*/
 733                 {
 734                 ghbn_miss++;
 735                 ret=gethostbyname(name);
 736                 if (ret == NULL) return(NULL);
 737                 /* else add to cache */
 738                 if(strlen(name) < sizeof ghbn_cache[0].name)
 739                         {
 740                         strcpy(ghbn_cache[lowi].name,name);
 741                         memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 742                         ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 743                         }
 744                 return(ret);
 745                 }
 746         else
 747                 {
 748                 ghbn_hits++;
 749                 ret= &(ghbn_cache[i].ent);
 750                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
 751                 return(ret);
 752                 }
 753         }
 754
 755 #endif