crypto/heimdal/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("$Id$");
  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 static void
  63 usage(int exit_code)
  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(exit_code);
  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 #define Authenticator asn1_Authenticator
 116 #include <krb5.h>
 117 static void
 118 krb5_init(void)
 119 {
 120     krb5_context context;
 121     krb5_error_code ret;
 122     krb5_boolean ret_val;
 123
 124     ret = krb5_init_context(&context);
 125     if (ret)
 126         return;
 127
 128 #if defined(AUTHENTICATION) && defined(FORWARD)
 129     krb5_appdefault_boolean(context, NULL,
 130                             NULL, "forward",
 131                             0, &ret_val);
 132     if (ret_val)
 133             kerberos5_set_forward(1);
 134     krb5_appdefault_boolean(context, NULL,
 135                             NULL, "forwardable",
 136                             0, &ret_val);
 137     if (ret_val)
 138             kerberos5_set_forwardable(1);
 139 #endif
 140 #ifdef  ENCRYPTION
 141     krb5_appdefault_boolean(context, NULL,
 142                             NULL, "encrypt",
 143                             0, &ret_val);
 144     if (ret_val) {
 145           encrypt_auto(1);
 146           decrypt_auto(1);
 147           wantencryption = 1;
 148           EncryptVerbose(1);
 149         }
 150 #endif
 151
 152     krb5_free_context(context);
 153 }
 154 #endif
 155
 156 int
 157 main(int argc, char **argv)
 158 {
 159         int ch;
 160         char *user;
 161
 162         setprogname(argv[0]);
 163
 164 #ifdef KRB5
 165         krb5_init();
 166 #endif
 167
 168         tninit();               /* Clear out things */
 169
 170         TerminalSaveState();
 171
 172         if ((prompt = strrchr(argv[0], '/')))
 173                 ++prompt;
 174         else
 175                 prompt = argv[0];
 176
 177         user = NULL;
 178
 179         rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE;
 180
 181         /*
 182          * if AUTHENTICATION and ENCRYPTION is set autologin will be
 183          * se to true after the getopt switch; unless the -K option is
 184          * passed
 185          */
 186         autologin = -1;
 187
 188         if (argc == 2 && strcmp(argv[1], "--version") == 0) {
 189             print_version(NULL);
 190             exit(0);
 191         }
 192         if (argc == 2 && strcmp(argv[1], "--help") == 0)
 193             usage(0);
 194
 195
 196         while((ch = getopt(argc, argv,
 197                            "78DEKLS:X:abcde:fFk:l:n:rxG")) != -1) {
 198                 switch(ch) {
 199                 case '8':
 200                         eight = 3;      /* binary output and input */
 201                         break;
 202                 case '7':
 203                         eight = 0;
 204                         break;
 205                 case 'b':
 206                     binary = 3;
 207                     break;
 208                 case 'D': {
 209                     /* sometimes we don't want a mangled display */
 210                     char *p;
 211                     if((p = getenv("DISPLAY")))
 212                         env_define((unsigned char*)"DISPLAY", (unsigned char*)p);
 213                     break;
 214                 }
 215                 case 'E':
 216                         rlogin = escape = _POSIX_VDISABLE;
 217                         break;
 218                 case 'K':
 219 #ifdef  AUTHENTICATION
 220                         autologin = 0;
 221 #endif
 222                         break;
 223                 case 'L':
 224                         eight |= 2;     /* binary output only */
 225                         break;
 226                 case 'S':
 227                     {
 228 #ifdef  HAVE_PARSETOS
 229                         extern int tos;
 230
 231                         if ((tos = parsetos(optarg, "tcp")) < 0)
 232                                 fprintf(stderr, "%s%s%s%s\n",
 233                                         prompt, ": Bad TOS argument '",
 234                                         optarg,
 235                                         "; will try to use default TOS");
 236 #else
 237                         fprintf(stderr,
 238                            "%s: Warning: -S ignored, no parsetos() support.\n",
 239                                                                 prompt);
 240 #endif
 241                     }
 242                         break;
 243                 case 'X':
 244 #ifdef  AUTHENTICATION
 245                         auth_disable_name(optarg);
 246 #endif
 247                         break;
 248                 case 'a':
 249                         autologin = 1;
 250                         break;
 251                 case 'c':
 252                         skiprc = 1;
 253                         break;
 254                 case 'd':
 255                         debug = 1;
 256                         break;
 257                 case 'e':
 258                         set_escape_char(optarg);
 259                         break;
 260                 case 'f':
 261                 case 'F':
 262                 case 'G':
 263 #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
 264                         if (forward_option) {
 265                             fprintf(stderr,
 266                                     "%s: Only one of -f, -F and -G allowed.\n",
 267                                     prompt);
 268                             usage(1);
 269                         }
 270                         forward_option = ch;
 271 #else
 272                         fprintf(stderr,
 273                          "%s: Warning: -%c ignored, no Kerberos V5 support.\n",
 274                                 prompt, ch);
 275 #endif
 276                         break;
 277                 case 'k':
 278                     fprintf(stderr,
 279                             "%s: Warning: -k ignored, no Kerberos V4 support.\n",
 280                             prompt);
 281                     break;
 282                 case 'l':
 283                   if(autologin == 0){
 284                     fprintf(stderr, "%s: Warning: -K ignored\n", prompt);
 285                     autologin = -1;
 286                   }
 287                         user = optarg;
 288                         break;
 289                 case 'n':
 290                                 SetNetTrace(optarg);
 291                         break;
 292                 case 'r':
 293                         rlogin = '~';
 294                         break;
 295                 case 'x':
 296 #ifdef  ENCRYPTION
 297                         encrypt_auto(1);
 298                         decrypt_auto(1);
 299                         wantencryption = 1;
 300                         EncryptVerbose(1);
 301 #else
 302                         fprintf(stderr,
 303                             "%s: Warning: -x ignored, no ENCRYPT support.\n",
 304                                                                 prompt);
 305 #endif
 306                         break;
 307
 308                 case '?':
 309                 default:
 310                         usage(1);
 311                         /* NOTREACHED */
 312                 }
 313         }
 314
 315         if (autologin == -1) {          /* esc@magic.fi; force  */
 316 #if defined(AUTHENTICATION)
 317                 autologin = 1;
 318 #endif
 319 #if defined(ENCRYPTION)
 320                 encrypt_auto(1);
 321                 decrypt_auto(1);
 322                 wantencryption = -1;
 323 #endif
 324         }
 325
 326         if (autologin == -1)
 327                 autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1;
 328
 329         argc -= optind;
 330         argv += optind;
 331
 332         if (argc) {
 333                 char *args[7], **argp = args;
 334
 335                 if (argc > 2)
 336                         usage(1);
 337                 *argp++ = prompt;
 338                 if (user) {
 339                         *argp++ = "-l";
 340                         *argp++ = user;
 341                 }
 342                 *argp++ = argv[0];              /* host */
 343                 if (argc > 1)
 344                         *argp++ = argv[1];      /* port */
 345                 *argp = 0;
 346
 347                 if (setjmp(toplevel) != 0)
 348                         Exit(0);
 349                 if (tn(argp - args, args) == 1)
 350                         return (0);
 351                 else
 352                         return (1);
 353         }
 354         setjmp(toplevel);
 355         for (;;) {
 356                         command(1, 0, 0);
 357         }
 358 }