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: main.c,v 1.38 2002/08/28 21:05:22 joda 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 #ifdef KRB5
 164         krb5_init();
 165 #endif
 166
 167         tninit();               /* Clear out things */
 168
 169         TerminalSaveState();
 170
 171         if ((prompt = strrchr(argv[0], '/')))
 172                 ++prompt;
 173         else
 174                 prompt = argv[0];
 175
 176         user = NULL;
 177
 178         rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE;
 179
 180         /*
 181          * if AUTHENTICATION and ENCRYPTION is set autologin will be
 182          * se to true after the getopt switch; unless the -K option is
 183          * passed
 184          */
 185         autologin = -1;
 186
 187         if (argc == 2 && strcmp(argv[1], "--version") == 0) {
 188             print_version(NULL);
 189             exit(0);
 190         }
 191
 192         while((ch = getopt(argc, argv,
 193                            "78DEKLS:X:abcde:fFk:l:n:rxG")) != -1) {
 194                 switch(ch) {
 195                 case '8':
 196                         eight = 3;      /* binary output and input */
 197                         break;
 198                 case '7':
 199                         eight = 0;
 200                         break;
 201                 case 'b':
 202                     binary = 3;
 203                     break;
 204                 case 'D': {
 205                     /* sometimes we don't want a mangled display */
 206                     char *p;
 207                     if((p = getenv("DISPLAY")))
 208                         env_define((unsigned char*)"DISPLAY", (unsigned char*)p);
 209                     break;
 210                 }
 211                 case 'E':
 212                         rlogin = escape = _POSIX_VDISABLE;
 213                         break;
 214                 case 'K':
 215 #ifdef  AUTHENTICATION
 216                         autologin = 0;
 217 #endif
 218                         break;
 219                 case 'L':
 220                         eight |= 2;     /* binary output only */
 221                         break;
 222                 case 'S':
 223                     {
 224 #ifdef  HAVE_PARSETOS
 225                         extern int tos;
 226
 227                         if ((tos = parsetos(optarg, "tcp")) < 0)
 228                                 fprintf(stderr, "%s%s%s%s\n",
 229                                         prompt, ": Bad TOS argument '",
 230                                         optarg,
 231                                         "; will try to use default TOS");
 232 #else
 233                         fprintf(stderr,
 234                            "%s: Warning: -S ignored, no parsetos() support.\n",
 235                                                                 prompt);
 236 #endif
 237                     }
 238                         break;
 239                 case 'X':
 240 #ifdef  AUTHENTICATION
 241                         auth_disable_name(optarg);
 242 #endif
 243                         break;
 244                 case 'a':
 245                         autologin = 1;
 246                         break;
 247                 case 'c':
 248                         skiprc = 1;
 249                         break;
 250                 case 'd':
 251                         debug = 1;
 252                         break;
 253                 case 'e':
 254                         set_escape_char(optarg);
 255                         break;
 256                 case 'f':
 257                 case 'F':
 258                 case 'G':
 259 #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
 260                         if (forward_option) {
 261                             fprintf(stderr,
 262                                     "%s: Only one of -f, -F and -G allowed.\n",
 263                                     prompt);
 264                             usage();
 265                         }
 266                         forward_option = ch;
 267 #else
 268                         fprintf(stderr,
 269                          "%s: Warning: -%c ignored, no Kerberos V5 support.\n",
 270                                 prompt, ch);
 271 #endif
 272                         break;
 273                 case 'k':
 274 #if defined(AUTHENTICATION) && defined(KRB4)
 275                     {
 276                         dest_realm = dst_realm_buf;
 277                         strlcpy(dest_realm, optarg, dst_realm_sz);
 278                     }
 279 #else
 280                         fprintf(stderr,
 281                            "%s: Warning: -k ignored, no Kerberos V4 support.\n",
 282                                                                 prompt);
 283 #endif
 284                         break;
 285                 case 'l':
 286                   if(autologin == 0){
 287                     fprintf(stderr, "%s: Warning: -K ignored\n", prompt);
 288                     autologin = -1;
 289                   }
 290                         user = optarg;
 291                         break;
 292                 case 'n':
 293                                 SetNetTrace(optarg);
 294                         break;
 295                 case 'r':
 296                         rlogin = '~';
 297                         break;
 298                 case 'x':
 299 #ifdef  ENCRYPTION
 300                         encrypt_auto(1);
 301                         decrypt_auto(1);
 302                         wantencryption = 1;
 303                         EncryptVerbose(1);
 304 #else
 305                         fprintf(stderr,
 306                             "%s: Warning: -x ignored, no ENCRYPT support.\n",
 307                                                                 prompt);
 308 #endif
 309                         break;
 310
 311                 case '?':
 312                 default:
 313                         usage();
 314                         /* NOTREACHED */
 315                 }
 316         }
 317
 318         if (autologin == -1) {          /* esc@magic.fi; force  */
 319 #if defined(AUTHENTICATION)
 320                 autologin = 1;
 321 #endif
 322 #if defined(ENCRYPTION)
 323                 encrypt_auto(1);
 324                 decrypt_auto(1);
 325                 wantencryption = -1;
 326 #endif
 327         }
 328
 329         if (autologin == -1)
 330                 autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1;
 331
 332         argc -= optind;
 333         argv += optind;
 334
 335         if (argc) {
 336                 char *args[7], **argp = args;
 337
 338                 if (argc > 2)
 339                         usage();
 340                 *argp++ = prompt;
 341                 if (user) {
 342                         *argp++ = "-l";
 343                         *argp++ = user;
 344                 }
 345                 *argp++ = argv[0];              /* host */
 346                 if (argc > 1)
 347                         *argp++ = argv[1];      /* port */
 348                 *argp = 0;
 349
 350                 if (setjmp(toplevel) != 0)
 351                         Exit(0);
 352                 if (tn(argp - args, args) == 1)
 353                         return (0);
 354                 else
 355                         return (1);
 356         }
 357         setjmp(toplevel);
 358         for (;;) {
 359                         command(1, 0, 0);
 360         }
 361 }