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 * @(#)main.c 8.3 (Berkeley) 5/30/95 34 * $FreeBSD: src/usr.bin/telnet/main.c,v 1.10.2.5 2002/04/13 11:07:13 markm Exp $ 35 * $DragonFly: src/usr.bin/telnet/main.c,v 1.2 2003/06/17 04:29:32 dillon Exp $ 36 */ 37 38 #include <sys/types.h> 39 #include <sys/socket.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 #include "ring.h" 45 #include "externs.h" 46 #include "defines.h" 47 48 49 /* These values need to be the same as defined in libtelnet/kerberos5.c */ 50 /* Either define them in both places, or put in some common header file. */ 51 #define OPTS_FORWARD_CREDS 0x00000002 52 #define OPTS_FORWARDABLE_CREDS 0x00000001 53 54 #if 0 55 #define FORWARD 56 #endif 57 58 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 59 char *ipsec_policy_in = NULL; 60 char *ipsec_policy_out = NULL; 61 #endif 62 63 int family = AF_UNSPEC; 64 65 /* 66 * Initialize variables. 67 */ 68 void 69 tninit(void) 70 { 71 init_terminal(); 72 73 init_network(); 74 75 init_telnet(); 76 77 init_sys(); 78 } 79 80 static void 81 usage(void) 82 { 83 fprintf(stderr, "Usage: %s %s%s%s%s\n", 84 prompt, 85 "[-4] [-6] [-8] [-E] [-L] [-N] [-S tos] [-c] [-d]", 86 "\n\t[-e char] [-l user] [-n tracefile] ", 87 "[-r] [-s src_addr] [-u] ", 88 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 89 "[-P policy] " 90 #endif 91 "[host-name [port]]" 92 ); 93 exit(1); 94 } 95 96 /* 97 * main. Parse arguments, invoke the protocol or command parser. 98 */ 99 100 int 101 main(int argc, char *argv[]) 102 { 103 int ch; 104 char *user; 105 char *src_addr = NULL; 106 #ifdef FORWARD 107 extern int forward_flags; 108 #endif /* FORWARD */ 109 110 tninit(); /* Clear out things */ 111 112 TerminalSaveState(); 113 114 if ((prompt = strrchr(argv[0], '/'))) 115 ++prompt; 116 else 117 prompt = argv[0]; 118 119 user = NULL; 120 121 rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE; 122 autologin = -1; 123 124 125 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 126 #define IPSECOPT "P:" 127 #else 128 #define IPSECOPT 129 #endif 130 while ((ch = getopt(argc, argv, 131 "468EKLNS:X:acde:fFk:l:n:rs:t:uxy" IPSECOPT)) != -1) 132 #undef IPSECOPT 133 { 134 switch(ch) { 135 case '4': 136 family = AF_INET; 137 break; 138 #ifdef INET6 139 case '6': 140 family = AF_INET6; 141 break; 142 #endif 143 case '8': 144 eight = 3; /* binary output and input */ 145 break; 146 case 'E': 147 rlogin = escape = _POSIX_VDISABLE; 148 break; 149 case 'K': 150 break; 151 case 'L': 152 eight |= 2; /* binary output only */ 153 break; 154 case 'N': 155 doaddrlookup = 0; 156 break; 157 case 'S': 158 { 159 #ifdef HAS_GETTOS 160 extern int tos; 161 162 if ((tos = parsetos(optarg, "tcp")) < 0) 163 fprintf(stderr, "%s%s%s%s\n", 164 prompt, ": Bad TOS argument '", 165 optarg, 166 "; will try to use default TOS"); 167 #else 168 fprintf(stderr, 169 "%s: Warning: -S ignored, no parsetos() support.\n", 170 prompt); 171 #endif 172 } 173 break; 174 case 'X': 175 break; 176 case 'a': 177 autologin = 1; 178 break; 179 case 'c': 180 skiprc = 1; 181 break; 182 case 'd': 183 debug = 1; 184 break; 185 case 'e': 186 set_escape_char(optarg); 187 break; 188 case 'f': 189 fprintf(stderr, 190 "%s: Warning: -f ignored, no Kerberos V5 support.\n", 191 prompt); 192 break; 193 case 'F': 194 fprintf(stderr, 195 "%s: Warning: -F ignored, no Kerberos V5 support.\n", 196 prompt); 197 break; 198 case 'k': 199 fprintf(stderr, 200 "%s: Warning: -k ignored, no Kerberos V4 support.\n", 201 prompt); 202 break; 203 case 'l': 204 autologin = 1; 205 user = optarg; 206 break; 207 case 'n': 208 SetNetTrace(optarg); 209 break; 210 case 'r': 211 rlogin = '~'; 212 break; 213 case 's': 214 src_addr = optarg; 215 break; 216 case 'u': 217 family = AF_UNIX; 218 break; 219 case 'x': 220 fprintf(stderr, 221 "%s: Warning: -x ignored, no ENCRYPT support.\n", 222 prompt); 223 break; 224 case 'y': 225 fprintf(stderr, 226 "%s: Warning: -y ignored, no ENCRYPT support.\n", 227 prompt); 228 break; 229 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 230 case 'P': 231 if (!strncmp("in", optarg, 2)) 232 ipsec_policy_in = strdup(optarg); 233 else if (!strncmp("out", optarg, 3)) 234 ipsec_policy_out = strdup(optarg); 235 else 236 usage(); 237 break; 238 #endif 239 case '?': 240 default: 241 usage(); 242 /* NOTREACHED */ 243 } 244 } 245 if (autologin == -1) 246 autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1; 247 248 argc -= optind; 249 argv += optind; 250 251 if (argc) { 252 char *args[9], **argp = args; 253 254 if (argc > 2) 255 usage(); 256 *argp++ = prompt; 257 if (user) { 258 *argp++ = strdup("-l"); 259 *argp++ = user; 260 } 261 if (src_addr) { 262 *argp++ = strdup("-s"); 263 *argp++ = src_addr; 264 } 265 *argp++ = argv[0]; /* host */ 266 if (argc > 1) 267 *argp++ = argv[1]; /* port */ 268 *argp = 0; 269 270 if (setjmp(toplevel) != 0) 271 Exit(0); 272 if (tn(argp - args, args) == 1) 273 return (0); 274 else 275 return (1); 276 } 277 (void)setjmp(toplevel); 278 for (;;) { 279 command(1, 0, 0); 280 } 281 return 0; 282 } 283