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1.20 ! guenther 1: /* $OpenBSD: main.c,v 1.19 2009/10/27 23:59:44 deraadt Exp $ */
1.2 niklas 2: /* $NetBSD: main.c,v 1.5 1996/02/28 21:04:05 thorpej Exp $ */
3:
1.1 deraadt 4: /*
1.2 niklas 5: * Copyright (c) 1988, 1990, 1993
6: * The Regents of the University of California. All rights reserved.
1.1 deraadt 7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.14 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
1.5 art 33: #include "telnet_locl.h"
1.1 deraadt 34:
35: /* These values need to be the same as defined in libtelnet/kerberos5.c */
36: /* Either define them in both places, or put in some common header file. */
1.2 niklas 37: #define OPTS_FORWARD_CREDS 0x00000002
38: #define OPTS_FORWARDABLE_CREDS 0x00000001
1.1 deraadt 39:
1.11 hin 40: #ifdef KRB5
1.1 deraadt 41: #define FORWARD
1.11 hin 42: /* XXX ugly hack to setup dns-proxy stuff */
43: #define Authenticator asn1_Authenticator
44: #include <kerberosV/krb5.h>
1.1 deraadt 45: #endif
46:
1.6 art 47: #ifdef KRB4
48: #include <kerberosIV/krb.h>
49: #endif
50:
1.11 hin 51: #ifdef FORWARD
52: int forward_flags;
53: static int default_forward=0;
54: #endif
55:
1.15 otto 56: int family = AF_UNSPEC;
1.20 ! guenther 57: u_int rtableid;
1.15 otto 58:
1.1 deraadt 59: /*
60: * Initialize variables.
61: */
62: void
63: tninit()
64: {
65: init_terminal();
66:
67: init_network();
1.2 niklas 68:
1.1 deraadt 69: init_telnet();
70:
71: init_sys();
72:
73: #if defined(TN3270)
74: init_3270();
75: #endif
76: }
77:
78: void
79: usage()
80: {
1.16 jmc 81: extern char *__progname;
82:
83: (void)fprintf(stderr,
84: #if defined(TN3270)
85: "usage: %s [-d] [-n filename] [-t commandname] [sysname [port]]\n",
1.1 deraadt 86: # else
1.16 jmc 87: "usage: %s [-468acdEFfKLrx] [-b hostalias] [-e escapechar] "
88: "[-k realm]\n"
1.20 ! guenther 89: "\t[-l user] [-n tracefile] [-V rtable] [-X authtype] "
1.17 claudio 90: "[host [port]]\n",
1.1 deraadt 91: #endif
1.16 jmc 92: __progname);
93:
1.1 deraadt 94: exit(1);
95: }
96:
1.11 hin 97:
98: #ifdef KRB5
99: static void
100: krb5_init(void)
101: {
102: krb5_context context;
103: krb5_error_code ret;
104:
105: ret = krb5_init_context(&context);
106: if (ret)
107: return;
108:
109: #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
110: if (krb5_config_get_bool (context, NULL,
111: "libdefaults", "forward", NULL)) {
112: forward_flags |= OPTS_FORWARD_CREDS;
113: default_forward=1;
114: }
115: if (krb5_config_get_bool (context, NULL,
116: "libdefaults", "forwardable", NULL)) {
117: forward_flags |= OPTS_FORWARDABLE_CREDS;
118: default_forward=1;
119: }
120: #endif
121: #ifdef ENCRYPTION
122: if (krb5_config_get_bool (context, NULL,
123: "libdefaults", "encrypt", NULL)) {
124: encrypt_auto(1);
125: decrypt_auto(1);
1.13 hin 126: wantencryption = 1;
1.11 hin 127: EncryptVerbose(1);
128: }
129: #endif
130:
131: krb5_free_context(context);
132: }
133: #endif
134:
1.1 deraadt 135: /*
136: * main. Parse arguments, invoke the protocol or command parser.
137: */
138:
1.7 art 139: int
1.1 deraadt 140: main(argc, argv)
141: int argc;
142: char *argv[];
143: {
144: extern char *optarg;
145: extern int optind;
146: int ch;
1.5 art 147: char *user, *alias;
1.17 claudio 148: const char *errstr;
1.1 deraadt 149: #ifdef FORWARD
150: extern int forward_flags;
151: #endif /* FORWARD */
152:
1.11 hin 153: #ifdef KRB5
154: krb5_init();
155: #endif
156:
1.1 deraadt 157: tninit(); /* Clear out things */
158:
159: TerminalSaveState();
160:
1.5 art 161: if ((prompt = strrchr(argv[0], '/')))
1.1 deraadt 162: ++prompt;
163: else
164: prompt = argv[0];
165:
1.3 niklas 166: user = alias = NULL;
1.1 deraadt 167:
168: rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE;
1.5 art 169:
170: /*
171: * if AUTHENTICATION and ENCRYPTION is set autologin will be
172: * set to true after the getopt switch; unless the -K option is
173: * passed
174: */
1.1 deraadt 175: autologin = -1;
176:
1.17 claudio 177: while ((ch = getopt(argc, argv, "4678DEKLS:X:ab:cde:fFk:l:n:rt:V:x"))
1.15 otto 178: != -1) {
1.1 deraadt 179: switch(ch) {
1.15 otto 180: case '4':
181: family = AF_INET;
182: break;
183: case '6':
184: family = AF_INET6;
185: break;
1.1 deraadt 186: case '8':
187: eight = 3; /* binary output and input */
188: break;
1.5 art 189: case '7':
190: eight = 0;
191: break;
192: case 'D': {
193: /* sometimes we don't want a mangled display */
194: char *p;
195: if((p = getenv("DISPLAY")))
196: env_define("DISPLAY", (unsigned char*)p);
197: break;
198: }
199:
1.1 deraadt 200: case 'E':
201: rlogin = escape = _POSIX_VDISABLE;
202: break;
203: case 'K':
204: #ifdef AUTHENTICATION
205: autologin = 0;
206: #endif
207: break;
208: case 'L':
209: eight |= 2; /* binary output only */
210: break;
211: case 'S':
212: {
213: #ifdef HAS_GETTOS
214: extern int tos;
215:
216: if ((tos = parsetos(optarg, "tcp")) < 0)
217: fprintf(stderr, "%s%s%s%s\n",
218: prompt, ": Bad TOS argument '",
219: optarg,
220: "; will try to use default TOS");
221: #else
222: fprintf(stderr,
223: "%s: Warning: -S ignored, no parsetos() support.\n",
224: prompt);
225: #endif
226: }
227: break;
228: case 'X':
229: #ifdef AUTHENTICATION
230: auth_disable_name(optarg);
231: #endif
232: break;
233: case 'a':
234: autologin = 1;
235: break;
236: case 'c':
237: skiprc = 1;
238: break;
239: case 'd':
240: debug = 1;
241: break;
242: case 'e':
243: set_escape_char(optarg);
244: break;
245: case 'f':
246: #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
1.11 hin 247: if ((forward_flags & OPTS_FORWARD_CREDS) &&
248: !default_forward) {
1.2 niklas 249: fprintf(stderr,
1.1 deraadt 250: "%s: Only one of -f and -F allowed.\n",
251: prompt);
252: usage();
253: }
254: forward_flags |= OPTS_FORWARD_CREDS;
255: #else
256: fprintf(stderr,
1.2 niklas 257: "%s: Warning: -f ignored, no Kerberos V5 support.\n",
1.1 deraadt 258: prompt);
259: #endif
260: break;
261: case 'F':
262: #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
1.11 hin 263: if ((forward_flags & OPTS_FORWARD_CREDS) &&
264: !default_forward) {
1.2 niklas 265: fprintf(stderr,
1.1 deraadt 266: "%s: Only one of -f and -F allowed.\n",
267: prompt);
268: usage();
269: }
270: forward_flags |= OPTS_FORWARD_CREDS;
271: forward_flags |= OPTS_FORWARDABLE_CREDS;
272: #else
273: fprintf(stderr,
1.2 niklas 274: "%s: Warning: -F ignored, no Kerberos V5 support.\n",
1.1 deraadt 275: prompt);
276: #endif
277: break;
278: case 'k':
279: #if defined(AUTHENTICATION) && defined(KRB4)
280: {
1.5 art 281: extern char *dest_realm, dst_realm_buf[];
282: extern int dst_realm_sz;
1.1 deraadt 283: dest_realm = dst_realm_buf;
284: (void)strncpy(dest_realm, optarg, dst_realm_sz);
285: }
286: #else
287: fprintf(stderr,
288: "%s: Warning: -k ignored, no Kerberos V4 support.\n",
289: prompt);
290: #endif
291: break;
292: case 'l':
1.6 art 293: autologin = -1;
1.1 deraadt 294: user = optarg;
295: break;
1.3 niklas 296: case 'b':
297: alias = optarg;
298: break;
1.1 deraadt 299: case 'n':
300: #if defined(TN3270) && defined(unix)
301: /* distinguish between "-n oasynch" and "-noasynch" */
302: if (argv[optind - 1][0] == '-' && argv[optind - 1][1]
303: == 'n' && argv[optind - 1][2] == 'o') {
304: if (!strcmp(optarg, "oasynch")) {
305: noasynchtty = 1;
306: noasynchnet = 1;
307: } else if (!strcmp(optarg, "oasynchtty"))
308: noasynchtty = 1;
309: else if (!strcmp(optarg, "oasynchnet"))
310: noasynchnet = 1;
311: } else
312: #endif /* defined(TN3270) && defined(unix) */
313: SetNetTrace(optarg);
314: break;
315: case 'r':
316: rlogin = '~';
317: break;
318: case 't':
319: #if defined(TN3270) && defined(unix)
1.10 aaron 320: (void)strlcpy(tline, optarg, sizeof tline);
1.1 deraadt 321: transcom = tline;
322: #else
323: fprintf(stderr,
324: "%s: Warning: -t ignored, no TN3270 support.\n",
325: prompt);
326: #endif
1.17 claudio 327: break;
328: case 'V':
1.20 ! guenther 329: rtableid = (unsigned int)strtonum(optarg, 0,
1.17 claudio 330: RT_TABLEID_MAX, &errstr);
331: if (errstr) {
1.20 ! guenther 332: fprintf(stderr, "%s: Warning: "
! 333: "-V ignored, rtable %s: %s\n",
1.17 claudio 334: prompt, errstr, optarg);
335: }
1.1 deraadt 336: break;
337: case 'x':
1.5 art 338: #ifdef ENCRYPTION
339: encrypt_auto(1);
340: decrypt_auto(1);
1.13 hin 341: wantencryption = 1;
1.5 art 342: EncryptVerbose(1);
343: #else
1.1 deraadt 344: fprintf(stderr,
345: "%s: Warning: -x ignored, no ENCRYPT support.\n",
346: prompt);
1.5 art 347: #endif
1.1 deraadt 348: break;
349: case '?':
350: default:
351: usage();
352: /* NOTREACHED */
353: }
354: }
1.5 art 355:
1.11 hin 356: if (autologin == -1) {
1.6 art 357: #if defined(AUTHENTICATION)
1.13 hin 358: if(check_krb4_tickets() || check_krb5_tickets())
359: autologin = 1;
1.5 art 360: #endif
361: #if defined(ENCRYPTION)
1.11 hin 362: encrypt_auto(1);
363: decrypt_auto(1);
1.5 art 364: #endif
365: }
1.13 hin 366:
1.1 deraadt 367: if (autologin == -1)
368: autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1;
369:
370: argc -= optind;
371: argv += optind;
372:
373: if (argc) {
374: char *args[7], **argp = args;
375:
376: if (argc > 2)
377: usage();
378: *argp++ = prompt;
379: if (user) {
380: *argp++ = "-l";
381: *argp++ = user;
1.3 niklas 382: }
383: if (alias) {
384: *argp++ = "-b";
385: *argp++ = alias;
1.1 deraadt 386: }
387: *argp++ = argv[0]; /* host */
388: if (argc > 1)
389: *argp++ = argv[1]; /* port */
390: *argp = 0;
391:
392: if (setjmp(toplevel) != 0)
393: Exit(0);
394: if (tn(argp - args, args) == 1)
395: return (0);
396: else
397: return (1);
398: }
399: (void)setjmp(toplevel);
400: for (;;) {
401: #ifdef TN3270
402: if (shell_active)
403: shell_continue();
404: else
405: #endif
406: command(1, 0, 0);
407: }
1.7 art 408: return 0;
1.1 deraadt 409: }