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 #if 0 35 #ifndef lint 36 static const char sccsid[] = "@(#)main.c 8.3 (Berkeley) 5/30/95"; 37 #endif 38 #endif 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD: src/contrib/telnet/telnet/main.c,v 1.20 2005/01/09 10:24:45 maxim Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/socket.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 #include "ring.h" 49 #include "externs.h" 50 #include "defines.h" 51 52 #ifdef AUTHENTICATION 53 #include <libtelnet/auth.h> 54 #endif 55 #ifdef ENCRYPTION 56 #include <libtelnet/encrypt.h> 57 #endif 58 59 /* These values need to be the same as defined in libtelnet/kerberos5.c */ 60 /* Either define them in both places, or put in some common header file. */ 61 #define OPTS_FORWARD_CREDS 0x00000002 62 #define OPTS_FORWARDABLE_CREDS 0x00000001 63 64 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 65 char *ipsec_policy_in = NULL; 66 char *ipsec_policy_out = NULL; 67 #endif 68 69 extern int tos; 70 71 int family = AF_UNSPEC; 72 73 /* 74 * Initialize variables. 75 */ 76 void 77 tninit(void) 78 { 79 init_terminal(); 80 81 init_network(); 82 83 init_telnet(); 84 85 init_sys(); 86 } 87 88 static void 89 usage(void) 90 { 91 fprintf(stderr, "usage: %s %s%s%s%s\n", 92 prompt, 93 #ifdef AUTHENTICATION 94 "[-4] [-6] [-8] [-E] [-K] [-L] [-N] [-S tos] [-X atype] [-c] [-d]", 95 "\n\t[-e char] [-k realm] [-l user] [-f/-F] [-n tracefile] ", 96 #else 97 "[-4] [-6] [-8] [-E] [-L] [-N] [-S tos] [-c] [-d]", 98 "\n\t[-e char] [-l user] [-n tracefile] ", 99 #endif 100 "[-r] [-s src_addr] [-u] ", 101 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 102 "[-P policy] " 103 #endif 104 #ifdef ENCRYPTION 105 "[-y] [host-name [port]]" 106 #else /* ENCRYPTION */ 107 "[host-name [port]]" 108 #endif /* ENCRYPTION */ 109 ); 110 exit(1); 111 } 112 113 /* 114 * main. Parse arguments, invoke the protocol or command parser. 115 */ 116 117 int 118 main(int argc, char *argv[]) 119 { 120 int ch; 121 #if (!defined(__BEOS__) && !defined(__HAIKU__)) 122 char *ep; 123 u_long ultmp; 124 #endif 125 char *user; 126 char *src_addr = NULL; 127 #ifdef FORWARD 128 extern int forward_flags; 129 #endif /* FORWARD */ 130 131 tninit(); /* Clear out things */ 132 133 TerminalSaveState(); 134 135 if ((prompt = strrchr(argv[0], '/'))) 136 ++prompt; 137 else 138 prompt = argv[0]; 139 140 user = NULL; 141 142 rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE; 143 #ifdef AUTHENTICATION 144 autologin = 1; 145 #else 146 autologin = -1; 147 #endif 148 149 #ifdef ENCRYPTION 150 encrypt_auto(1); 151 decrypt_auto(1); 152 #endif 153 154 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 155 #define IPSECOPT "P:" 156 #else 157 #define IPSECOPT 158 #endif 159 while ((ch = getopt(argc, argv, 160 "468EKLNS:X:acde:fFk:l:n:rs:uxy" IPSECOPT)) != -1) 161 #undef IPSECOPT 162 { 163 switch(ch) { 164 case '4': 165 family = AF_INET; 166 break; 167 #ifdef INET6 168 case '6': 169 family = AF_INET6; 170 break; 171 #endif 172 case '8': 173 eight = 3; /* binary output and input */ 174 break; 175 case 'E': 176 rlogin = escape = _POSIX_VDISABLE; 177 break; 178 case 'K': 179 #ifdef AUTHENTICATION 180 autologin = 0; 181 #endif 182 break; 183 case 'L': 184 eight |= 2; /* binary output only */ 185 break; 186 case 'N': 187 doaddrlookup = 0; 188 break; 189 case 'S': 190 #if (defined(__BEOS__) || defined(__HAIKU__)) 191 fprintf(stderr, "-S option is not supported\n"); 192 #else 193 # ifdef HAS_GETTOS 194 195 if ((tos = parsetos(optarg, "tcp")) < 0) 196 fprintf(stderr, "%s%s%s%s\n", 197 prompt, ": Bad TOS argument '", 198 optarg, 199 "; will try to use default TOS"); 200 # else 201 # define MAXTOS 255 202 ultmp = strtoul(optarg, &ep, 0); 203 if (*ep || ep == optarg || ultmp > MAXTOS) 204 fprintf(stderr, "%s%s%s%s\n", 205 prompt, ": Bad TOS argument '", 206 optarg, 207 "; will try to use default TOS"); 208 else 209 tos = ultmp; 210 # endif 211 #endif /* __BEOS__ */ 212 break; 213 case 'X': 214 #ifdef AUTHENTICATION 215 auth_disable_name(optarg); 216 #endif 217 break; 218 case 'a': 219 #ifdef AUTHENTICATION 220 /* It's the default now, so ignore */ 221 #else 222 autologin = 1; 223 #endif 224 break; 225 case 'c': 226 skiprc = 1; 227 break; 228 case 'd': 229 telnet_debug = 1; 230 break; 231 case 'e': 232 set_escape_char(optarg); 233 break; 234 case 'f': 235 #ifdef AUTHENTICATION 236 #if defined(KRB5) && defined(FORWARD) 237 if (forward_flags & OPTS_FORWARD_CREDS) { 238 fprintf(stderr, 239 "%s: Only one of -f and -F allowed.\n", 240 prompt); 241 usage(); 242 } 243 forward_flags |= OPTS_FORWARD_CREDS; 244 #else 245 fprintf(stderr, 246 "%s: Warning: -f ignored, no Kerberos V5 support.\n", 247 prompt); 248 #endif 249 #else 250 fprintf(stderr, 251 "%s: Warning: -f ignored, no Kerberos V5 support.\n", 252 prompt); 253 #endif 254 break; 255 case 'F': 256 #ifdef AUTHENTICATION 257 #if defined(KRB5) && defined(FORWARD) 258 if (forward_flags & OPTS_FORWARD_CREDS) { 259 fprintf(stderr, 260 "%s: Only one of -f and -F allowed.\n", 261 prompt); 262 usage(); 263 } 264 forward_flags |= OPTS_FORWARD_CREDS; 265 forward_flags |= OPTS_FORWARDABLE_CREDS; 266 #else 267 fprintf(stderr, 268 "%s: Warning: -F ignored, no Kerberos V5 support.\n", 269 prompt); 270 #endif 271 #else 272 fprintf(stderr, 273 "%s: Warning: -F ignored, no Kerberos V5 support.\n", 274 prompt); 275 #endif 276 break; 277 case 'k': 278 #ifdef AUTHENTICATION 279 #if defined(KRB4) 280 { 281 extern char *dest_realm, dst_realm_buf[], dst_realm_sz; 282 dest_realm = dst_realm_buf; 283 (void)strncpy(dest_realm, optarg, dst_realm_sz); 284 } 285 #else 286 fprintf(stderr, 287 "%s: Warning: -k ignored, no Kerberos V4 support.\n", 288 prompt); 289 #endif 290 #else 291 fprintf(stderr, 292 "%s: Warning: -k ignored, no Kerberos V4 support.\n", 293 prompt); 294 #endif 295 break; 296 case 'l': 297 #ifdef AUTHENTICATION 298 /* This is the default now, so ignore it */ 299 #else 300 autologin = 1; 301 #endif 302 user = optarg; 303 break; 304 case 'n': 305 SetNetTrace(optarg); 306 break; 307 case 'r': 308 rlogin = '~'; 309 break; 310 case 's': 311 src_addr = optarg; 312 break; 313 case 'u': 314 family = AF_UNIX; 315 break; 316 case 'x': 317 #ifndef ENCRYPTION 318 fprintf(stderr, 319 "%s: Warning: -x ignored, no ENCRYPT support.\n", 320 prompt); 321 #endif /* ENCRYPTION */ 322 break; 323 case 'y': 324 #ifdef ENCRYPTION 325 encrypt_auto(0); 326 decrypt_auto(0); 327 #else 328 fprintf(stderr, 329 "%s: Warning: -y ignored, no ENCRYPT support.\n", 330 prompt); 331 #endif /* ENCRYPTION */ 332 break; 333 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 334 case 'P': 335 if (!strncmp("in", optarg, 2)) 336 ipsec_policy_in = strdup(optarg); 337 else if (!strncmp("out", optarg, 3)) 338 ipsec_policy_out = strdup(optarg); 339 else 340 usage(); 341 break; 342 #endif 343 case '?': 344 default: 345 usage(); 346 /* NOTREACHED */ 347 } 348 } 349 if (autologin == -1) 350 autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1; 351 352 argc -= optind; 353 argv += optind; 354 355 if (argc) { 356 char *args[9], **argp = args; 357 358 if (argc > 2) 359 usage(); 360 *argp++ = prompt; 361 if (user) { 362 *argp++ = strdup("-l"); 363 *argp++ = user; 364 } 365 if (src_addr) { 366 *argp++ = strdup("-s"); 367 *argp++ = src_addr; 368 } 369 *argp++ = argv[0]; /* host */ 370 if (argc > 1) 371 *argp++ = argv[1]; /* port */ 372 *argp = 0; 373 374 if (setjmp(toplevel) != 0) 375 Exit(0); 376 if (tn(argp - args, args) == 1) 377 return (0); 378 else 379 return (1); 380 } 381 (void)setjmp(toplevel); 382 for (;;) { 383 command(1, 0, 0); 384 } 385 return 0; 386 } 387