| Current Path : /usr/src/crypto/heimdal/appl/telnet/telnet/ |
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| Current File : //usr/src/crypto/heimdal/appl/telnet/telnet/main.c |
/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
static char *copyright[] = {
"@(#) Copyright (c) 1988, 1990, 1993\n"
"\tThe Regents of the University of California. All rights reserved.\n",
(char*)copyright
};
#include "telnet_locl.h"
RCSID("$Id: main.c 21731 2007-07-30 20:01:26Z lha $");
#if KRB5
#define FORWARD
#endif
/*
* Initialize variables.
*/
void
tninit(void)
{
init_terminal();
init_network();
init_telnet();
init_sys();
}
static void
usage(int exit_code)
{
fprintf(stderr, "Usage: %s %s%s%s%s\n", prompt,
#ifdef AUTHENTICATION
"[-8] [-E] [-K] [-L] [-G] [-S tos] [-X atype] [-a] [-c] [-d] [-e char]",
"\n\t[-k realm] [-l user] [-f/-F] [-n tracefile] ",
#else
"[-8] [-E] [-L] [-S tos] [-a] [-c] [-d] [-e char] [-l user]",
"\n\t[-n tracefile]",
#endif
"[-r] ",
#ifdef ENCRYPTION
"[-x] [host-name [port]]"
#else
"[host-name [port]]"
#endif
);
exit(exit_code);
}
/*
* main. Parse arguments, invoke the protocol or command parser.
*/
#ifdef FORWARD
int forward_option = 0; /* forward flags set from command line */
#endif /* FORWARD */
void
set_forward_options(void)
{
#ifdef FORWARD
switch(forward_option) {
case 'f':
kerberos5_set_forward(1);
kerberos5_set_forwardable(0);
break;
case 'F':
kerberos5_set_forward(1);
kerberos5_set_forwardable(1);
break;
case 'G':
kerberos5_set_forward(0);
kerberos5_set_forwardable(0);
break;
default:
break;
}
#endif
}
#ifdef KRB5
#define Authenticator asn1_Authenticator
#include <krb5.h>
static void
krb5_init(void)
{
krb5_context context;
krb5_error_code ret;
krb5_boolean ret_val;
ret = krb5_init_context(&context);
if (ret)
return;
#if defined(AUTHENTICATION) && defined(FORWARD)
krb5_appdefault_boolean(context, NULL,
NULL, "forward",
0, &ret_val);
if (ret_val)
kerberos5_set_forward(1);
krb5_appdefault_boolean(context, NULL,
NULL, "forwardable",
0, &ret_val);
if (ret_val)
kerberos5_set_forwardable(1);
#endif
#ifdef ENCRYPTION
krb5_appdefault_boolean(context, NULL,
NULL, "encrypt",
0, &ret_val);
if (ret_val) {
encrypt_auto(1);
decrypt_auto(1);
wantencryption = 1;
EncryptVerbose(1);
}
#endif
krb5_free_context(context);
}
#endif
#if defined(AUTHENTICATION) && defined(KRB4)
extern char *dest_realm, dst_realm_buf[];
extern int dst_realm_sz;
#endif
int
main(int argc, char **argv)
{
int ch;
char *user;
setprogname(argv[0]);
#ifdef KRB5
krb5_init();
#endif
tninit(); /* Clear out things */
TerminalSaveState();
if ((prompt = strrchr(argv[0], '/')))
++prompt;
else
prompt = argv[0];
user = NULL;
rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE;
/*
* if AUTHENTICATION and ENCRYPTION is set autologin will be
* se to true after the getopt switch; unless the -K option is
* passed
*/
autologin = -1;
if (argc == 2 && strcmp(argv[1], "--version") == 0) {
print_version(NULL);
exit(0);
}
if (argc == 2 && strcmp(argv[1], "--help") == 0)
usage(0);
while((ch = getopt(argc, argv,
"78DEKLS:X:abcde:fFk:l:n:rxG")) != -1) {
switch(ch) {
case '8':
eight = 3; /* binary output and input */
break;
case '7':
eight = 0;
break;
case 'b':
binary = 3;
break;
case 'D': {
/* sometimes we don't want a mangled display */
char *p;
if((p = getenv("DISPLAY")))
env_define((unsigned char*)"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 HAVE_PARSETOS
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':
case 'F':
case 'G':
#if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
if (forward_option) {
fprintf(stderr,
"%s: Only one of -f, -F and -G allowed.\n",
prompt);
usage(1);
}
forward_option = ch;
#else
fprintf(stderr,
"%s: Warning: -%c ignored, no Kerberos V5 support.\n",
prompt, ch);
#endif
break;
case 'k':
#if defined(AUTHENTICATION) && defined(KRB4)
{
dest_realm = dst_realm_buf;
strlcpy(dest_realm, optarg, dst_realm_sz);
}
#else
fprintf(stderr,
"%s: Warning: -k ignored, no Kerberos V4 support.\n",
prompt);
#endif
break;
case 'l':
if(autologin == 0){
fprintf(stderr, "%s: Warning: -K ignored\n", prompt);
autologin = -1;
}
user = optarg;
break;
case 'n':
SetNetTrace(optarg);
break;
case 'r':
rlogin = '~';
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(1);
/* NOTREACHED */
}
}
if (autologin == -1) { /* esc@magic.fi; force */
#if defined(AUTHENTICATION)
autologin = 1;
#endif
#if defined(ENCRYPTION)
encrypt_auto(1);
decrypt_auto(1);
wantencryption = -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(1);
*argp++ = prompt;
if (user) {
*argp++ = "-l";
*argp++ = user;
}
*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);
}
setjmp(toplevel);
for (;;) {
command(1, 0, 0);
}
}