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 1.34 2001/12/20 20:39:52 joda Exp $"); 42 43 /* These values need to be the same as defined in libtelnet/kerberos5.c */ 44 /* Either define them in both places, or put in some common header file. */ 45 #define OPTS_FORWARD_CREDS 0x00000002 46 #define OPTS_FORWARDABLE_CREDS 0x00000001 47 48 #if KRB5 49 #define FORWARD 50 #endif 51 52 /* 53 * Initialize variables. 54 */ 55 void 56 tninit(void) 57 { 58 init_terminal(); 59 60 init_network(); 61 62 init_telnet(); 63 64 init_sys(); 65 } 66 67 void 68 usage(void) 69 { 70 fprintf(stderr, "Usage: %s %s%s%s%s\n", prompt, 71 #ifdef AUTHENTICATION 72 "[-8] [-E] [-K] [-L] [-G] [-S tos] [-X atype] [-a] [-c] [-d] [-e char]", 73 "\n\t[-k realm] [-l user] [-f/-F] [-n tracefile] ", 74 #else 75 "[-8] [-E] [-L] [-S tos] [-a] [-c] [-d] [-e char] [-l user]", 76 "\n\t[-n tracefile]", 77 #endif 78 "[-r] ", 79 #ifdef ENCRYPTION 80 "[-x] [host-name [port]]" 81 #else 82 "[host-name [port]]" 83 #endif 84 ); 85 exit(1); 86 } 87 88 /* 89 * main. Parse arguments, invoke the protocol or command parser. 90 */ 91 92 93 #ifdef FORWARD 94 extern int forward_flags; 95 static int default_forward=0; 96 #endif /* FORWARD */ 97 98 #ifdef KRB5 99 /* XXX ugly hack to setup dns-proxy stuff */ 100 #define Authenticator asn1_Authenticator 101 #include <krb5.h> 102 static void 103 krb5_init(void) 104 { 105 krb5_context context; 106 krb5_error_code ret; 107 108 ret = krb5_init_context(&context); 109 if (ret) 110 return; 111 112 #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD) 113 if (krb5_config_get_bool (context, NULL, 114 "libdefaults", "forward", NULL)) { 115 forward_flags |= OPTS_FORWARD_CREDS; 116 default_forward=1; 117 } 118 if (krb5_config_get_bool (context, NULL, 119 "libdefaults", "forwardable", NULL)) { 120 forward_flags |= OPTS_FORWARDABLE_CREDS; 121 default_forward=1; 122 } 123 #endif 124 #ifdef ENCRYPTION 125 if (krb5_config_get_bool (context, NULL, 126 "libdefaults", "encrypt", NULL)) { 127 encrypt_auto(1); 128 decrypt_auto(1); 129 wantencryption = 1; 130 EncryptVerbose(1); 131 } 132 #endif 133 134 krb5_free_context(context); 135 } 136 #endif 137 138 #if defined(AUTHENTICATION) && defined(KRB4) 139 extern char *dest_realm, dst_realm_buf[]; 140 extern int dst_realm_sz; 141 #endif 142 143 int 144 main(int argc, char **argv) 145 { 146 int ch; 147 char *user; 148 149 #ifdef KRB5 150 krb5_init(); 151 #endif 152 153 tninit(); /* Clear out things */ 154 155 TerminalSaveState(); 156 157 if ((prompt = strrchr(argv[0], '/'))) 158 ++prompt; 159 else 160 prompt = argv[0]; 161 162 user = NULL; 163 164 rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE; 165 166 /* 167 * if AUTHENTICATION and ENCRYPTION is set autologin will be 168 * se to true after the getopt switch; unless the -K option is 169 * passed 170 */ 171 autologin = -1; 172 173 while((ch = getopt(argc, argv, 174 "78DEKLS:X:abcde:fFk:l:n:rxG")) != -1) { 175 switch(ch) { 176 case '8': 177 eight = 3; /* binary output and input */ 178 break; 179 case '7': 180 eight = 0; 181 break; 182 case 'b': 183 binary = 3; 184 break; 185 case 'D': { 186 /* sometimes we don't want a mangled display */ 187 char *p; 188 if((p = getenv("DISPLAY"))) 189 env_define((unsigned char*)"DISPLAY", (unsigned char*)p); 190 break; 191 } 192 case 'E': 193 rlogin = escape = _POSIX_VDISABLE; 194 break; 195 case 'K': 196 #ifdef AUTHENTICATION 197 autologin = 0; 198 #endif 199 break; 200 case 'L': 201 eight |= 2; /* binary output only */ 202 break; 203 case 'S': 204 { 205 #ifdef HAVE_PARSETOS 206 extern int tos; 207 208 if ((tos = parsetos(optarg, "tcp")) < 0) 209 fprintf(stderr, "%s%s%s%s\n", 210 prompt, ": Bad TOS argument '", 211 optarg, 212 "; will try to use default TOS"); 213 #else 214 fprintf(stderr, 215 "%s: Warning: -S ignored, no parsetos() support.\n", 216 prompt); 217 #endif 218 } 219 break; 220 case 'X': 221 #ifdef AUTHENTICATION 222 auth_disable_name(optarg); 223 #endif 224 break; 225 case 'a': 226 autologin = 1; 227 break; 228 case 'c': 229 skiprc = 1; 230 break; 231 case 'd': 232 debug = 1; 233 break; 234 case 'e': 235 set_escape_char(optarg); 236 break; 237 case 'f': 238 #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD) 239 if ((forward_flags & OPTS_FORWARD_CREDS) && 240 !default_forward) { 241 fprintf(stderr, 242 "%s: Only one of -f and -F allowed.\n", 243 prompt); 244 usage(); 245 } 246 forward_flags |= OPTS_FORWARD_CREDS; 247 #else 248 fprintf(stderr, 249 "%s: Warning: -f ignored, no Kerberos V5 support.\n", 250 prompt); 251 #endif 252 break; 253 case 'F': 254 #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD) 255 if ((forward_flags & OPTS_FORWARD_CREDS) && 256 !default_forward) { 257 fprintf(stderr, 258 "%s: Only one of -f and -F allowed.\n", 259 prompt); 260 usage(); 261 } 262 forward_flags |= OPTS_FORWARD_CREDS; 263 forward_flags |= OPTS_FORWARDABLE_CREDS; 264 #else 265 fprintf(stderr, 266 "%s: Warning: -F ignored, no Kerberos V5 support.\n", 267 prompt); 268 #endif 269 break; 270 case 'k': 271 #if defined(AUTHENTICATION) && defined(KRB4) 272 { 273 dest_realm = dst_realm_buf; 274 strlcpy(dest_realm, optarg, dst_realm_sz); 275 } 276 #else 277 fprintf(stderr, 278 "%s: Warning: -k ignored, no Kerberos V4 support.\n", 279 prompt); 280 #endif 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 case 'G': 308 #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD) 309 forward_flags ^= OPTS_FORWARD_CREDS; 310 forward_flags ^= OPTS_FORWARDABLE_CREDS; 311 #else 312 fprintf(stderr, 313 "%s: Warning: -G ignored, no Kerberos V5 support.\n", 314 prompt); 315 #endif 316 break; 317 318 case '?': 319 default: 320 usage(); 321 /* NOTREACHED */ 322 } 323 } 324 325 if (autologin == -1) { /* esc@magic.fi; force */ 326 #if defined(AUTHENTICATION) 327 autologin = 1; 328 #endif 329 #if defined(ENCRYPTION) 330 encrypt_auto(1); 331 decrypt_auto(1); 332 #endif 333 } 334 335 if (autologin == -1) 336 autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1; 337 338 argc -= optind; 339 argv += optind; 340 341 if (argc) { 342 char *args[7], **argp = args; 343 344 if (argc > 2) 345 usage(); 346 *argp++ = prompt; 347 if (user) { 348 *argp++ = "-l"; 349 *argp++ = user; 350 } 351 *argp++ = argv[0]; /* host */ 352 if (argc > 1) 353 *argp++ = argv[1]; /* port */ 354 *argp = 0; 355 356 if (setjmp(toplevel) != 0) 357 Exit(0); 358 if (tn(argp - args, args) == 1) 359 return (0); 360 else 361 return (1); 362 } 363 setjmp(toplevel); 364 for (;;) { 365 command(1, 0, 0); 366 } 367 } 368