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 #ifdef WATT32
 182         extern int _watt_do_exit;
 183         _watt_do_exit = 0;
 184         if (sock_init())
 185                 return (0);
 186 #elif defined(OPENSSL_SYS_WINDOWS)
 187         if (!wsa_init_done)
 188                 {
 189                 int err;
 190
 191 #ifdef SIGINT
 192                 signal(SIGINT,(void (*)(int))ssl_sock_cleanup);
 193 #endif
 194                 wsa_init_done=1;
 195                 memset(&wsa_state,0,sizeof(wsa_state));
 196                 if (WSAStartup(0x0101,&wsa_state)!=0)
 197                         {
 198                         err=WSAGetLastError();
 199                         BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
 200                         return(0);
 201                         }
 202
 203 #ifdef OPENSSL_SYS_WIN16
 204                 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
 205                 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
 206                 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
 207
 208                 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
 209 #endif /* OPENSSL_SYS_WIN16 */
 210                 }
 211 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 212    WORD wVerReq;
 213    WSADATA wsaData;
 214    int err;
 215
 216    if (!wsa_init_done)
 217       {
 218
 219 # ifdef SIGINT
 220       signal(SIGINT,(void (*)(int))sock_cleanup);
 221 # endif
 222
 223       wsa_init_done=1;
 224       wVerReq = MAKEWORD( 2, 0 );
 225       err = WSAStartup(wVerReq,&wsaData);
 226       if (err != 0)
 227          {
 228          BIO_printf(bio_err,"unable to start WINSOCK2, error code=%d\n",err);
 229          return(0);
 230          }
 231       }
 232 #endif /* OPENSSL_SYS_WINDOWS */
 233         return(1);
 234         }
 235
 236 int init_client(int *sock, const char *host, int port, int type)
 237         {
 238         unsigned char ip[4];
 239
 240         ip[0] = ip[1] = ip[2] = ip[3] = 0;
 241         if (!host_ip(host,&(ip[0])))
 242                 return 0;
 243         return init_client_ip(sock,ip,port,type);
 244         }
 245
 246 static int init_client_ip(int *sock, const unsigned char ip[4], int port,
 247                           int type)
 248         {
 249         unsigned long addr;
 250         struct sockaddr_in them;
 251         int s,i;
 252
 253         if (!ssl_sock_init()) return(0);
 254
 255         memset((char *)&them,0,sizeof(them));
 256         them.sin_family=AF_INET;
 257         them.sin_port=htons((unsigned short)port);
 258         addr=(unsigned long)
 259                 ((unsigned long)ip[0]<<24L)|
 260                 ((unsigned long)ip[1]<<16L)|
 261                 ((unsigned long)ip[2]<< 8L)|
 262                 ((unsigned long)ip[3]);
 263         them.sin_addr.s_addr=htonl(addr);
 264
 265         if (type == SOCK_STREAM)
 266                 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 267         else /* ( type == SOCK_DGRAM) */
 268                 s=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
 269
 270         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 271
 272 #if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE)
 273         if (type == SOCK_STREAM)
 274                 {
 275                 i=0;
 276                 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 277                 if (i < 0) { closesocket(s); perror("keepalive"); return(0); }
 278                 }
 279 #endif
 280
 281         if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
 282                 { closesocket(s); perror("connect"); return(0); }
 283         *sock=s;
 284         return(1);
 285         }
 286
 287 #ifndef NO_SYS_UN_H
 288 int init_client_unix(int *sock, const char *server)
 289         {
 290         struct sockaddr_un them;
 291         int s;
 292
 293         if (strlen(server) > (UNIX_PATH_MAX + 1)) return(0);
 294         if (!ssl_sock_init()) return(0);
 295
 296         s=socket(AF_UNIX, SOCK_STREAM, 0);
 297         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 298
 299         memset((char *)&them,0,sizeof(them));
 300         them.sun_family=AF_UNIX;
 301         strcpy(them.sun_path, server);
 302
 303         if (connect(s, (struct sockaddr *)&them, sizeof(them)) == -1)
 304                 { closesocket(s); perror("connect"); return(0); }
 305         *sock=s;
 306         return(1);
 307         }
 308 #endif
 309
 310 int do_server(int port, int type, int *ret,
 311               int (*cb)(char *hostname, int s, int stype, unsigned char *context),
 312               unsigned char *context, int naccept)
 313         {
 314         int sock;
 315         char *name = NULL;
 316         int accept_socket = 0;
 317         int i;
 318
 319         if (!init_server(&accept_socket,port,type)) return(0);
 320
 321         if (ret != NULL)
 322                 {
 323                 *ret=accept_socket;
 324                 /* return(1);*/
 325                 }
 326         for (;;)
 327                 {
 328                 if (type==SOCK_STREAM)
 329                         {
 330 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
 331                         if (do_accept(accept_socket,&sock,NULL) == 0)
 332 #else
 333                         if (do_accept(accept_socket,&sock,&name) == 0)
 334 #endif
 335                                 {
 336                                 SHUTDOWN(accept_socket);
 337                                 return(0);
 338                                 }
 339                         }
 340                 else
 341                         sock = accept_socket;
 342                 i=(*cb)(name,sock, type, context);
 343                 if (name != NULL) OPENSSL_free(name);
 344                 if (type==SOCK_STREAM)
 345                         SHUTDOWN2(sock);
 346                 if (naccept != -1)
 347                         naccept--;
 348                 if (i < 0 || naccept == 0)
 349                         {
 350                         SHUTDOWN2(accept_socket);
 351                         return(i);
 352                         }
 353                 }
 354         }
 355
 356 #ifndef NO_SYS_UN_H
 357 int do_server_unix(const char *path, int *ret,
 358                    int (*cb)(char *hostname, int s, int stype, unsigned char *context),
 359                    unsigned char *context, int naccept)
 360         {
 361         int sock;
 362         int accept_socket = 0;
 363         int i;
 364
 365         if (!init_server_unix(&accept_socket, path)) return(0);
 366
 367         if (ret != NULL)
 368                 *ret=accept_socket;
 369         for (;;)
 370                 {
 371                 if (do_accept_unix(accept_socket, &sock) == 0)
 372                         {
 373                         SHUTDOWN(accept_socket);
 374                         i = 0;
 375                         goto out;
 376                         }
 377                 i=(*cb)(NULL, sock, 0, context);
 378                 SHUTDOWN2(sock);
 379                 if (naccept != -1)
 380                         naccept--;
 381                 if (i < 0 || naccept == 0)
 382                         {
 383                         SHUTDOWN2(accept_socket);
 384                         goto out;
 385                         }
 386                 }
 387 out:
 388         unlink(path);
 389         return(i);
 390         }
 391 #endif
 392
 393 static int init_server_long(int *sock, int port, char *ip, int type)
 394         {
 395         int ret=0;
 396         struct sockaddr_in server;
 397         int s= -1;
 398
 399         if (!ssl_sock_init()) return(0);
 400
 401         memset((char *)&server,0,sizeof(server));
 402         server.sin_family=AF_INET;
 403         server.sin_port=htons((unsigned short)port);
 404         if (ip == NULL)
 405                 server.sin_addr.s_addr=INADDR_ANY;
 406         else
 407 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
 408 #ifndef BIT_FIELD_LIMITS
 409                 memcpy(&server.sin_addr.s_addr,ip,4);
 410 #else
 411                 memcpy(&server.sin_addr,ip,4);
 412 #endif
 413
 414                 if (type == SOCK_STREAM)
 415                         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 416                 else /* type == SOCK_DGRAM */
 417                         s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
 418
 419         if (s == INVALID_SOCKET) goto err;
 420 #if defined SOL_SOCKET && defined SO_REUSEADDR
 421                 {
 422                 int j = 1;
 423                 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
 424                            (void *) &j, sizeof j);
 425                 }
 426 #endif
 427         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 428                 {
 429 #ifndef OPENSSL_SYS_WINDOWS
 430                 perror("bind");
 431 #endif
 432                 goto err;
 433                 }
 434         /* Make it 128 for linux */
 435         if (type==SOCK_STREAM && listen(s,128) == -1) goto err;
 436         *sock=s;
 437         ret=1;
 438 err:
 439         if ((ret == 0) && (s != -1))
 440                 {
 441                 SHUTDOWN(s);
 442                 }
 443         return(ret);
 444         }
 445
 446 static int init_server(int *sock, int port, int type)
 447         {
 448         return(init_server_long(sock, port, NULL, type));
 449         }
 450
 451 #ifndef NO_SYS_UN_H
 452 static int init_server_unix(int *sock, const char *path)
 453         {
 454         int ret = 0;
 455         struct sockaddr_un server;
 456         int s = -1;
 457
 458         if (strlen(path) > (UNIX_PATH_MAX + 1)) return(0);
 459         if (!ssl_sock_init()) return(0);
 460
 461         s=socket(AF_UNIX, SOCK_STREAM, 0);
 462         if (s == INVALID_SOCKET) goto err;
 463
 464         memset((char *)&server,0,sizeof(server));
 465         server.sun_family=AF_UNIX;
 466         strcpy(server.sun_path, path);
 467
 468         if (bind(s, (struct sockaddr *)&server, sizeof(server)) == -1)
 469                 {
 470 #ifndef OPENSSL_SYS_WINDOWS
 471                 perror("bind");
 472 #endif
 473                 goto err;
 474                 }
 475         /* Make it 128 for linux */
 476         if (listen(s,128) == -1)
 477                 {
 478 #ifndef OPENSSL_SYS_WINDOWS
 479                 perror("listen");
 480 #endif
 481                 unlink(path);
 482                 goto err;
 483                 }
 484         *sock=s;
 485         ret=1;
 486 err:
 487         if ((ret == 0) && (s != -1))
 488                 {
 489                 SHUTDOWN(s);
 490                 }
 491         return(ret);
 492         }
 493 #endif
 494
 495 static int do_accept(int acc_sock, int *sock, char **host)
 496         {
 497         int ret;
 498         struct hostent *h1,*h2;
 499         static struct sockaddr_in from;
 500         int len;
 501 /*      struct linger ling; */
 502
 503         if (!ssl_sock_init()) return(0);
 504
 505 #ifndef OPENSSL_SYS_WINDOWS
 506 redoit:
 507 #endif
 508
 509         memset((char *)&from,0,sizeof(from));
 510         len=sizeof(from);
 511         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
 512          * of type (int *) whereas under other systems it is (void *) if
 513          * you don't have a cast it will choke the compiler: if you do
 514          * have a cast then you can either go for (int *) or (void *).
 515          */
 516         ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
 517         if (ret == INVALID_SOCKET)
 518                 {
 519 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
 520                 int i;
 521                 i=WSAGetLastError();
 522                 BIO_printf(bio_err,"accept error %d\n",i);
 523 #else
 524                 if (errno == EINTR)
 525                         {
 526                         /*check_timeout(); */
 527                         goto redoit;
 528                         }
 529                 fprintf(stderr,"errno=%d ",errno);
 530                 perror("accept");
 531 #endif
 532                 return(0);
 533                 }
 534
 535 /*
 536         ling.l_onoff=1;
 537         ling.l_linger=0;
 538         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 539         if (i < 0) { perror("linger"); return(0); }
 540         i=0;
 541         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 542         if (i < 0) { perror("keepalive"); return(0); }
 543 */
 544
 545         if (host == NULL) goto end;
 546 #ifndef BIT_FIELD_LIMITS
 547         /* I should use WSAAsyncGetHostByName() under windows */
 548         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 549                 sizeof(from.sin_addr.s_addr),AF_INET);
 550 #else
 551         h1=gethostbyaddr((char *)&from.sin_addr,
 552                 sizeof(struct in_addr),AF_INET);
 553 #endif
 554         if (h1 == NULL)
 555                 {
 556                 BIO_printf(bio_err,"bad gethostbyaddr\n");
 557                 *host=NULL;
 558                 /* return(0); */
 559                 }
 560         else
 561                 {
 562                 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
 563                         {
 564                         perror("OPENSSL_malloc");
 565                         closesocket(ret);
 566                         return(0);
 567                         }
 568                 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1);
 569
 570                 h2=GetHostByName(*host);
 571                 if (h2 == NULL)
 572                         {
 573                         BIO_printf(bio_err,"gethostbyname failure\n");
 574                         closesocket(ret);
 575                         return(0);
 576                         }
 577                 if (h2->h_addrtype != AF_INET)
 578                         {
 579                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 580                         closesocket(ret);
 581                         return(0);
 582                         }
 583                 }
 584 end:
 585         *sock=ret;
 586         return(1);
 587         }
 588
 589 #ifndef NO_SYS_UN_H
 590 static int do_accept_unix(int acc_sock, int *sock)
 591         {
 592         int ret;
 593
 594         if (!ssl_sock_init()) return(0);
 595
 596 redoit:
 597         ret=accept(acc_sock, NULL, NULL);
 598         if (ret == INVALID_SOCKET)
 599                 {
 600                 if (errno == EINTR)
 601                         {
 602                         /*check_timeout(); */
 603                         goto redoit;
 604                         }
 605                 fprintf(stderr,"errno=%d ",errno);
 606                 perror("accept");
 607                 return(0);
 608                 }
 609
 610         *sock=ret;
 611         return(1);
 612         }
 613 #endif
 614
 615 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
 616              short *port_ptr)
 617         {
 618         char *h,*p;
 619
 620         h=str;
 621         p=strchr(str,':');
 622         if (p == NULL)
 623                 {
 624                 BIO_printf(bio_err,"no port defined\n");
 625                 return(0);
 626                 }
 627         *(p++)='\0';
 628
 629         if ((ip != NULL) && !host_ip(str,ip))
 630                 goto err;
 631         if (host_ptr != NULL) *host_ptr=h;
 632
 633         if (!extract_port(p,port_ptr))
 634                 goto err;
 635         return(1);
 636 err:
 637         return(0);
 638         }
 639
 640 static int host_ip(const char *str, unsigned char ip[4])
 641         {
 642         unsigned int in[4];
 643         int i;
 644
 645         if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
 646                 {
 647                 for (i=0; i<4; i++)
 648                         if (in[i] > 255)
 649                                 {
 650                                 BIO_printf(bio_err,"invalid IP address\n");
 651                                 goto err;
 652                                 }
 653                 ip[0]=in[0];
 654                 ip[1]=in[1];
 655                 ip[2]=in[2];
 656                 ip[3]=in[3];
 657                 }
 658         else
 659                 { /* do a gethostbyname */
 660                 struct hostent *he;
 661
 662                 if (!ssl_sock_init()) return(0);
 663
 664                 he=GetHostByName(str);
 665                 if (he == NULL)
 666                         {
 667                         BIO_printf(bio_err,"gethostbyname failure\n");
 668                         goto err;
 669                         }
 670                 /* cast to short because of win16 winsock definition */
 671                 if ((short)he->h_addrtype != AF_INET)
 672                         {
 673                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 674                         return(0);
 675                         }
 676                 ip[0]=he->h_addr_list[0][0];
 677                 ip[1]=he->h_addr_list[0][1];
 678                 ip[2]=he->h_addr_list[0][2];
 679                 ip[3]=he->h_addr_list[0][3];
 680                 }
 681         return(1);
 682 err:
 683         return(0);
 684         }
 685
 686 int extract_port(const char *str, short *port_ptr)
 687         {
 688         int i;
 689         struct servent *s;
 690
 691         i=atoi(str);
 692         if (i != 0)
 693                 *port_ptr=(unsigned short)i;
 694         else
 695                 {
 696                 s=getservbyname(str,"tcp");
 697                 if (s == NULL)
 698                         {
 699                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 700                         return(0);
 701                         }
 702                 *port_ptr=ntohs((unsigned short)s->s_port);
 703                 }
 704         return(1);
 705         }
 706
 707 #define GHBN_NUM        4
 708 static struct ghbn_cache_st
 709         {
 710         char name[128];
 711         struct hostent ent;
 712         unsigned long order;
 713         } ghbn_cache[GHBN_NUM];
 714
 715 static unsigned long ghbn_hits=0L;
 716 static unsigned long ghbn_miss=0L;
 717
 718 static struct hostent *GetHostByName(const char *name)
 719         {
 720         struct hostent *ret;
 721         int i,lowi=0;
 722         unsigned long low= (unsigned long)-1;
 723
 724         for (i=0; i<GHBN_NUM; i++)
 725                 {
 726                 if (low > ghbn_cache[i].order)
 727                         {
 728                         low=ghbn_cache[i].order;
 729                         lowi=i;
 730                         }
 731                 if (ghbn_cache[i].order > 0)
 732                         {
 733                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
 734                                 break;
 735                         }
 736                 }
 737         if (i == GHBN_NUM) /* no hit*/
 738                 {
 739                 ghbn_miss++;
 740                 ret=gethostbyname(name);
 741                 if (ret == NULL) return(NULL);
 742                 /* else add to cache */
 743                 if(strlen(name) < sizeof ghbn_cache[0].name)
 744                         {
 745                         strcpy(ghbn_cache[lowi].name,name);
 746                         memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 747                         ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 748                         }
 749                 return(ret);
 750                 }
 751         else
 752                 {
 753                 ghbn_hits++;
 754                 ret= &(ghbn_cache[i].ent);
 755                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
 756                 return(ret);
 757                 }
 758         }
 759
 760 #endif