OpenBSD-4.6/usr.bin/telnet/main.c
/* $OpenBSD: main.c,v 1.17 2009/06/05 00:20:46 claudio Exp $ */
/* $NetBSD: main.c,v 1.5 1996/02/28 21:04:05 thorpej Exp $ */
/*
* Copyright (c) 1988, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1988, 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#include "telnet_locl.h"
/* These values need to be the same as defined in libtelnet/kerberos5.c */
/* Either define them in both places, or put in some common header file. */
#define OPTS_FORWARD_CREDS 0x00000002
#define OPTS_FORWARDABLE_CREDS 0x00000001
#ifdef KRB5
#define FORWARD
/* XXX ugly hack to setup dns-proxy stuff */
#define Authenticator asn1_Authenticator
#include <kerberosV/krb5.h>
#endif
#ifdef KRB4
#include <kerberosIV/krb.h>
#endif
#ifdef FORWARD
int forward_flags;
static int default_forward=0;
#endif
int family = AF_UNSPEC;
u_int rdomain;
/*
* Initialize variables.
*/
void
tninit()
{
init_terminal();
init_network();
init_telnet();
init_sys();
#if defined(TN3270)
init_3270();
#endif
}
void
usage()
{
extern char *__progname;
(void)fprintf(stderr,
#if defined(TN3270)
"usage: %s [-d] [-n filename] [-t commandname] [sysname [port]]\n",
# else
"usage: %s [-468acdEFfKLrx] [-b hostalias] [-e escapechar] "
"[-k realm]\n"
"\t[-l user] [-n tracefile] [-V rdoamin] [-X authtype] "
"[host [port]]\n",
#endif
__progname);
exit(1);
}
#ifdef KRB5
static void
krb5_init(void)
{
krb5_context context;
krb5_error_code ret;
ret = krb5_init_context(&context);
if (ret)
return;
#if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
if (krb5_config_get_bool (context, NULL,
"libdefaults", "forward", NULL)) {
forward_flags |= OPTS_FORWARD_CREDS;
default_forward=1;
}
if (krb5_config_get_bool (context, NULL,
"libdefaults", "forwardable", NULL)) {
forward_flags |= OPTS_FORWARDABLE_CREDS;
default_forward=1;
}
#endif
#ifdef ENCRYPTION
if (krb5_config_get_bool (context, NULL,
"libdefaults", "encrypt", NULL)) {
encrypt_auto(1);
decrypt_auto(1);
wantencryption = 1;
EncryptVerbose(1);
}
#endif
krb5_free_context(context);
}
#endif
/*
* main. Parse arguments, invoke the protocol or command parser.
*/
int
main(argc, argv)
int argc;
char *argv[];
{
extern char *optarg;
extern int optind;
int ch;
char *user, *alias;
const char *errstr;
#ifdef FORWARD
extern int forward_flags;
#endif /* FORWARD */
#ifdef KRB5
krb5_init();
#endif
tninit(); /* Clear out things */
TerminalSaveState();
if ((prompt = strrchr(argv[0], '/')))
++prompt;
else
prompt = argv[0];
user = alias = NULL;
rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE;
/*
* if AUTHENTICATION and ENCRYPTION is set autologin will be
* set to true after the getopt switch; unless the -K option is
* passed
*/
autologin = -1;
while ((ch = getopt(argc, argv, "4678DEKLS:X:ab:cde:fFk:l:n:rt:V:x"))
!= -1) {
switch(ch) {
case '4':
family = AF_INET;
break;
case '6':
family = AF_INET6;
break;
case '8':
eight = 3; /* binary output and input */
break;
case '7':
eight = 0;
break;
case 'D': {
/* sometimes we don't want a mangled display */
char *p;
if((p = getenv("DISPLAY")))
env_define("DISPLAY", (unsigned char*)p);
break;
}
case 'E':
rlogin = escape = _POSIX_VDISABLE;
break;
case 'K':
#ifdef AUTHENTICATION
autologin = 0;
#endif
break;
case 'L':
eight |= 2; /* binary output only */
break;
case 'S':
{
#ifdef HAS_GETTOS
extern int tos;
if ((tos = parsetos(optarg, "tcp")) < 0)
fprintf(stderr, "%s%s%s%s\n",
prompt, ": Bad TOS argument '",
optarg,
"; will try to use default TOS");
#else
fprintf(stderr,
"%s: Warning: -S ignored, no parsetos() support.\n",
prompt);
#endif
}
break;
case 'X':
#ifdef AUTHENTICATION
auth_disable_name(optarg);
#endif
break;
case 'a':
autologin = 1;
break;
case 'c':
skiprc = 1;
break;
case 'd':
debug = 1;
break;
case 'e':
set_escape_char(optarg);
break;
case 'f':
#if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
if ((forward_flags & OPTS_FORWARD_CREDS) &&
!default_forward) {
fprintf(stderr,
"%s: Only one of -f and -F allowed.\n",
prompt);
usage();
}
forward_flags |= OPTS_FORWARD_CREDS;
#else
fprintf(stderr,
"%s: Warning: -f ignored, no Kerberos V5 support.\n",
prompt);
#endif
break;
case 'F':
#if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
if ((forward_flags & OPTS_FORWARD_CREDS) &&
!default_forward) {
fprintf(stderr,
"%s: Only one of -f and -F allowed.\n",
prompt);
usage();
}
forward_flags |= OPTS_FORWARD_CREDS;
forward_flags |= OPTS_FORWARDABLE_CREDS;
#else
fprintf(stderr,
"%s: Warning: -F ignored, no Kerberos V5 support.\n",
prompt);
#endif
break;
case 'k':
#if defined(AUTHENTICATION) && defined(KRB4)
{
extern char *dest_realm, dst_realm_buf[];
extern int dst_realm_sz;
dest_realm = dst_realm_buf;
(void)strncpy(dest_realm, optarg, dst_realm_sz);
}
#else
fprintf(stderr,
"%s: Warning: -k ignored, no Kerberos V4 support.\n",
prompt);
#endif
break;
case 'l':
autologin = -1;
user = optarg;
break;
case 'b':
alias = optarg;
break;
case 'n':
#if defined(TN3270) && defined(unix)
/* distinguish between "-n oasynch" and "-noasynch" */
if (argv[optind - 1][0] == '-' && argv[optind - 1][1]
== 'n' && argv[optind - 1][2] == 'o') {
if (!strcmp(optarg, "oasynch")) {
noasynchtty = 1;
noasynchnet = 1;
} else if (!strcmp(optarg, "oasynchtty"))
noasynchtty = 1;
else if (!strcmp(optarg, "oasynchnet"))
noasynchnet = 1;
} else
#endif /* defined(TN3270) && defined(unix) */
SetNetTrace(optarg);
break;
case 'r':
rlogin = '~';
break;
case 't':
#if defined(TN3270) && defined(unix)
(void)strlcpy(tline, optarg, sizeof tline);
transcom = tline;
#else
fprintf(stderr,
"%s: Warning: -t ignored, no TN3270 support.\n",
prompt);
#endif
break;
case 'V':
rdomain = (unsigned int)strtonum(optarg, 0,
RT_TABLEID_MAX, &errstr);
if (errstr) {
fprintf(stderr,
"%s: Warning: -R ignored, rdomain %s: %s\n",
prompt, errstr, optarg);
}
break;
case 'x':
#ifdef ENCRYPTION
encrypt_auto(1);
decrypt_auto(1);
wantencryption = 1;
EncryptVerbose(1);
#else
fprintf(stderr,
"%s: Warning: -x ignored, no ENCRYPT support.\n",
prompt);
#endif
break;
case '?':
default:
usage();
/* NOTREACHED */
}
}
if (autologin == -1) {
#if defined(AUTHENTICATION)
if(check_krb4_tickets() || check_krb5_tickets())
autologin = 1;
#endif
#if defined(ENCRYPTION)
encrypt_auto(1);
decrypt_auto(1);
#endif
}
if (autologin == -1)
autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1;
argc -= optind;
argv += optind;
if (argc) {
char *args[7], **argp = args;
if (argc > 2)
usage();
*argp++ = prompt;
if (user) {
*argp++ = "-l";
*argp++ = user;
}
if (alias) {
*argp++ = "-b";
*argp++ = alias;
}
*argp++ = argv[0]; /* host */
if (argc > 1)
*argp++ = argv[1]; /* port */
*argp = 0;
if (setjmp(toplevel) != 0)
Exit(0);
if (tn(argp - args, args) == 1)
return (0);
else
return (1);
}
(void)setjmp(toplevel);
for (;;) {
#ifdef TN3270
if (shell_active)
shell_continue();
else
#endif
command(1, 0, 0);
}
return 0;
}