crypto/heimdal-0.6.3/appl/telnet/telnet/main.c

   1 /*
   2  * Copyright (c) 1988, 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 static char *copyright[] = {
  35     "@(#) Copyright (c) 1988, 1990, 1993\n"
  36     "\tThe Regents of the University of California.  All rights reserved.\n",
  37     (char*)copyright
  38 };
  39
  40 #include "telnet_locl.h"
  41 RCSID("$Id: main.c,v 1.38.6.1 2004/03/22 18:16:35 lha Exp $");
  42
  43 #if KRB5
  44 #define FORWARD
  45 #endif
  46
  47 /*
  48  * Initialize variables.
  49  */
  50 void
  51 tninit(void)
  52 {
  53     init_terminal();
  54
  55     init_network();
  56
  57     init_telnet();
  58
  59     init_sys();
  60 }
  61
  62 void
  63 usage(void)
  64 {
  65   fprintf(stderr, "Usage: %s %s%s%s%s\n", prompt,
  66 #ifdef  AUTHENTICATION
  67           "[-8] [-E] [-K] [-L] [-G] [-S tos] [-X atype] [-a] [-c] [-d] [-e char]",
  68           "\n\t[-k realm] [-l user] [-f/-F] [-n tracefile] ",
  69 #else
  70           "[-8] [-E] [-L] [-S tos] [-a] [-c] [-d] [-e char] [-l user]",
  71           "\n\t[-n tracefile]",
  72 #endif
  73           "[-r] ",
  74 #ifdef  ENCRYPTION
  75           "[-x] [host-name [port]]"
  76 #else
  77           "[host-name [port]]"
  78 #endif
  79     );
  80   exit(1);
  81 }
  82
  83 /*
  84  * main.  Parse arguments, invoke the protocol or command parser.
  85  */
  86
  87
  88 #ifdef  FORWARD
  89 int forward_option = 0; /* forward flags set from command line */
  90 #endif  /* FORWARD */
  91 void
  92 set_forward_options(void)
  93 {
  94 #ifdef FORWARD
  95         switch(forward_option) {
  96         case 'f':
  97                 kerberos5_set_forward(1);
  98                 kerberos5_set_forwardable(0);
  99                 break;
 100         case 'F':
 101                 kerberos5_set_forward(1);
 102                 kerberos5_set_forwardable(1);
 103                 break;
 104         case 'G':
 105                 kerberos5_set_forward(0);
 106                 kerberos5_set_forwardable(0);
 107                 break;
 108         default:
 109                 break;
 110         }
 111 #endif
 112 }
 113
 114 #ifdef KRB5
 115 /* XXX ugly hack to setup dns-proxy stuff */
 116 #define Authenticator asn1_Authenticator
 117 #include <krb5.h>
 118 static void
 119 krb5_init(void)
 120 {
 121     krb5_context context;
 122     krb5_error_code ret;
 123
 124     ret = krb5_init_context(&context);
 125     if (ret)
 126         return;
 127
 128 #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
 129     if (krb5_config_get_bool (context, NULL,
 130          "libdefaults", "forward", NULL)) {
 131             kerberos5_set_forward(1);
 132     }
 133     if (krb5_config_get_bool (context, NULL,
 134          "libdefaults", "forwardable", NULL)) {
 135             kerberos5_set_forwardable(1);
 136     }
 137 #endif
 138 #ifdef  ENCRYPTION
 139     if (krb5_config_get_bool (context, NULL,
 140         "libdefaults", "encrypt", NULL)) {
 141           encrypt_auto(1);
 142           decrypt_auto(1);
 143           wantencryption = 1;
 144           EncryptVerbose(1);
 145         }
 146 #endif
 147
 148     krb5_free_context(context);
 149 }
 150 #endif
 151
 152 #if defined(AUTHENTICATION) && defined(KRB4)
 153 extern char *dest_realm, dst_realm_buf[];
 154 extern int dst_realm_sz;
 155 #endif
 156
 157 int
 158 main(int argc, char **argv)
 159 {
 160         int ch;
 161         char *user;
 162
 163         setprogname(argv[0]);
 164
 165 #ifdef KRB5
 166         krb5_init();
 167 #endif
 168
 169         tninit();               /* Clear out things */
 170
 171         TerminalSaveState();
 172
 173         if ((prompt = strrchr(argv[0], '/')))
 174                 ++prompt;
 175         else
 176                 prompt = argv[0];
 177
 178         user = NULL;
 179
 180         rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE;
 181
 182         /*
 183          * if AUTHENTICATION and ENCRYPTION is set autologin will be
 184          * se to true after the getopt switch; unless the -K option is
 185          * passed
 186          */
 187         autologin = -1;
 188
 189         if (argc == 2 && strcmp(argv[1], "--version") == 0) {
 190             print_version(NULL);
 191             exit(0);
 192         }
 193
 194         while((ch = getopt(argc, argv,
 195                            "78DEKLS:X:abcde:fFk:l:n:rxG")) != -1) {
 196                 switch(ch) {
 197                 case '8':
 198                         eight = 3;      /* binary output and input */
 199                         break;
 200                 case '7':
 201                         eight = 0;
 202                         break;
 203                 case 'b':
 204                     binary = 3;
 205                     break;
 206                 case 'D': {
 207                     /* sometimes we don't want a mangled display */
 208                     char *p;
 209                     if((p = getenv("DISPLAY")))
 210                         env_define((unsigned char*)"DISPLAY", (unsigned char*)p);
 211                     break;
 212                 }
 213                 case 'E':
 214                         rlogin = escape = _POSIX_VDISABLE;
 215                         break;
 216                 case 'K':
 217 #ifdef  AUTHENTICATION
 218                         autologin = 0;
 219 #endif
 220                         break;
 221                 case 'L':
 222                         eight |= 2;     /* binary output only */
 223                         break;
 224                 case 'S':
 225                     {
 226 #ifdef  HAVE_PARSETOS
 227                         extern int tos;
 228
 229                         if ((tos = parsetos(optarg, "tcp")) < 0)
 230                                 fprintf(stderr, "%s%s%s%s\n",
 231                                         prompt, ": Bad TOS argument '",
 232                                         optarg,
 233                                         "; will try to use default TOS");
 234 #else
 235                         fprintf(stderr,
 236                            "%s: Warning: -S ignored, no parsetos() support.\n",
 237                                                                 prompt);
 238 #endif
 239                     }
 240                         break;
 241                 case 'X':
 242 #ifdef  AUTHENTICATION
 243                         auth_disable_name(optarg);
 244 #endif
 245                         break;
 246                 case 'a':
 247                         autologin = 1;
 248                         break;
 249                 case 'c':
 250                         skiprc = 1;
 251                         break;
 252                 case 'd':
 253                         debug = 1;
 254                         break;
 255                 case 'e':
 256                         set_escape_char(optarg);
 257                         break;
 258                 case 'f':
 259                 case 'F':
 260                 case 'G':
 261 #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
 262                         if (forward_option) {
 263                             fprintf(stderr,
 264                                     "%s: Only one of -f, -F and -G allowed.\n",
 265                                     prompt);
 266                             usage();
 267                         }
 268                         forward_option = ch;
 269 #else
 270                         fprintf(stderr,
 271                          "%s: Warning: -%c ignored, no Kerberos V5 support.\n",
 272                                 prompt, ch);
 273 #endif
 274                         break;
 275                 case 'k':
 276 #if defined(AUTHENTICATION) && defined(KRB4)
 277                     {
 278                         dest_realm = dst_realm_buf;
 279                         strlcpy(dest_realm, optarg, dst_realm_sz);
 280                     }
 281 #else
 282                         fprintf(stderr,
 283                            "%s: Warning: -k ignored, no Kerberos V4 support.\n",
 284                                                                 prompt);
 285 #endif
 286                         break;
 287                 case 'l':
 288                   if(autologin == 0){
 289                     fprintf(stderr, "%s: Warning: -K ignored\n", prompt);
 290                     autologin = -1;
 291                   }
 292                         user = optarg;
 293                         break;
 294                 case 'n':
 295                                 SetNetTrace(optarg);
 296                         break;
 297                 case 'r':
 298                         rlogin = '~';
 299                         break;
 300                 case 'x':
 301 #ifdef  ENCRYPTION
 302                         encrypt_auto(1);
 303                         decrypt_auto(1);
 304                         wantencryption = 1;
 305                         EncryptVerbose(1);
 306 #else
 307                         fprintf(stderr,
 308                             "%s: Warning: -x ignored, no ENCRYPT support.\n",
 309                                                                 prompt);
 310 #endif
 311                         break;
 312
 313                 case '?':
 314                 default:
 315                         usage();
 316                         /* NOTREACHED */
 317                 }
 318         }
 319
 320         if (autologin == -1) {          /* esc@magic.fi; force  */
 321 #if defined(AUTHENTICATION)
 322                 autologin = 1;
 323 #endif
 324 #if defined(ENCRYPTION)
 325                 encrypt_auto(1);
 326                 decrypt_auto(1);
 327                 wantencryption = -1;
 328 #endif
 329         }
 330
 331         if (autologin == -1)
 332                 autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1;
 333
 334         argc -= optind;
 335         argv += optind;
 336
 337         if (argc) {
 338                 char *args[7], **argp = args;
 339
 340                 if (argc > 2)
 341                         usage();
 342                 *argp++ = prompt;
 343                 if (user) {
 344                         *argp++ = "-l";
 345                         *argp++ = user;
 346                 }
 347                 *argp++ = argv[0];              /* host */
 348                 if (argc > 1)
 349                         *argp++ = argv[1];      /* port */
 350                 *argp = 0;
 351
 352                 if (setjmp(toplevel) != 0)
 353                         Exit(0);
 354                 if (tn(argp - args, args) == 1)
 355                         return (0);
 356                 else
 357                         return (1);
 358         }
 359         setjmp(toplevel);
 360         for (;;) {
 361                         command(1, 0, 0);
 362         }
 363 }