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proxytunnel/cmdline.c
Mark Janssen 205a821a07 - Applied patch from "Andrew Griffiths" <nullptr@tasmail.com> to fix 
possible string format attacks. -- Maniac
- Some code cleanup and reformatting -- Maniac
- Added '-q' / '--quiet' flag to suppress status messages, Proxytunnel
  can not be completely quiet and transparant. (Not when also providing
  the '-v' flag naturally) -- Maniac
- Changed ipbuf size to 16, which should be enough. -- Maniac


git-svn-id: https://proxytunnel.svn.sourceforge.net/svnroot/proxytunnel/trunk/proxytunnel@13 bc163920-b10d-0410-b2c5-a5491ca2ceef
2001-11-24 12:42:56 +00:00

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/* Proxytunnel - (C) 2001 Jos Visser / Mark Janssen */
/* Contact: josv@osp.nl / maniac@maniac.nl */
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
#ifndef HAVE_GETOPT_LONG
char * optarg;
#else
#include <getopt.h>
#endif
#include "cmdline.h"
void
cmdline_parser_print_version (void)
{
printf ("%s %s\n%s\n", PACKAGE, VERSION, AUTHORS);
}
void
cmdline_parser_print_help (void)
{
cmdline_parser_print_version ();
printf("\n"
"Purpose:\n"
" Build generic tunnels trough HTTPS proxy's, supports HTTP authorization\n"
"\n"
"Usage: %s [OPTIONS]...\n\
-h --help Print help and exit\n\
-V --version Print version and exit\n\
-i --inetd Run from inetd (default=off)\n\
-u STRING --user=STRING Username to send to HTTPS proxy for auth\n\
-s STRING --pass=STRING Password to send to HTTPS proxy for auth\n\
-g STRING --proxyhost=STRING HTTPS Proxy host to connect to\n\
-G INT --proxyport=INT HTTPS Proxy portnumber to connect to\n\
-d STRING --desthost=STRING Destination host to built the tunnel to\n\
-D INT --destport=INT Destination portnumber to built the tunnel to\n\
-n --dottedquad Convert destination hostname to dotted quad\n\
-v --verbose Turn on verbosity (default=off)\n\
-q --quiet Suppress messages (default=off)\n\
", PACKAGE);
}
static char *
gengetopt_strdup (char * s)
{
char * n, * pn, * ps = s;
while (*ps) ps++;
n = (char *) malloc (1 + ps - s);
if (n != NULL)
{
for (ps=s,pn=n; *ps; ps++,pn++)
*pn = *ps;
*pn = 0;
}
return n;
}
int cmdline_parser( int argc, char * const *argv, struct gengetopt_args_info *args_info )
{
int c; /* Character of the parsed option. */
int missing_required_options = 0;
args_info->help_given = 0;
args_info->version_given = 0;
args_info->user_given = 0;
args_info->pass_given = 0;
args_info->proxyhost_given = 0;
args_info->proxyport_given = 0;
args_info->desthost_given = 0;
args_info->destport_given = 0;
args_info->dottedquad_given = 0;
args_info->verbose_given = 0;
args_info->inetd_given = 0;
args_info->quiet_given = 0;
/* No... we can't make this a function... -- Maniac */
#define clear_args() \
{ \
args_info->user_arg = NULL; \
args_info->pass_arg = NULL; \
args_info->proxyhost_arg = NULL; \
args_info->desthost_arg = NULL; \
args_info->dottedquad_flag = 0; \
args_info->verbose_flag = 0; \
args_info->inetd_flag = 0; \
args_info->quiet_flag = 0; \
}
clear_args();
optarg = 0;
#ifdef HAVE_GETOPT_LONG
optind = 1;
opterr = 1;
optopt = '?';
#endif
while (1)
{
int option_index = 0;
#ifdef HAVE_GETOPT_LONG
static struct option long_options[] = {
{ "help", 0, NULL, 'h' },
{ "version", 0, NULL, 'V' },
{ "user", 1, NULL, 'u' },
{ "pass", 1, NULL, 's' },
{ "proxyhost", 1, NULL, 'g' },
{ "proxyport", 1, NULL, 'G' },
{ "desthost", 1, NULL, 'd' },
{ "destport", 1, NULL, 'D' },
{ "dottedquad", 0, NULL, 'n' },
{ "verbose", 0, NULL, 'v' },
{ "inetd", 0, NULL, 'i' },
{ "quiet", 0, NULL, 'q' },
{ NULL, 0, NULL, 0 }
};
c = getopt_long (argc, argv, "hViu:s:g:G:d:D:nvq", long_options, &option_index);
#else
c = getopt( argc, argv, "hViu:s:g:G:d:D:nvq" );
#endif
if (c == -1) break; /* Exit from `while (1)' loop. */
switch (c)
{
case 'h': /* Print help and exit. */
clear_args ();
cmdline_parser_print_help ();
exit (0);
case 'i': /* Run from inetd. */
args_info->inetd_flag = !(args_info->inetd_flag);
break;
case 'V': /* Print version and exit. */
clear_args ();
cmdline_parser_print_version ();
exit (0);
case 'u': /* Username to send to HTTPS proxy for authentication. */
if (args_info->user_given)
{
fprintf (stderr, "%s: `--user' (`-u') option given more than once\n", PACKAGE);
clear_args ();
exit (1);
}
args_info->user_given = 1;
args_info->user_arg = gengetopt_strdup (optarg);
break;
case 's': /* Password to send to HTTPS proxy for authentication. */
if (args_info->pass_given)
{
fprintf (stderr, "%s: `--pass' (`-s') option given more than once\n", PACKAGE);
clear_args ();
exit (1);
}
args_info->pass_given = 1;
args_info->pass_arg = gengetopt_strdup (optarg);
break;
case 'g': /* HTTPS Proxy host to connect to. */
if (args_info->proxyhost_given)
{
fprintf (stderr, "%s: `--proxyhost' (`-g') option given more than once\n", PACKAGE);
clear_args ();
exit (1);
}
args_info->proxyhost_given = 1;
args_info->proxyhost_arg = gengetopt_strdup (optarg);
break;
case 'G': /* HTTPS Proxy host portnumber to connect to. */
if (args_info->proxyport_given)
{
fprintf (stderr, "%s: `--proxyport' (`-G') option given more than once\n", PACKAGE);
clear_args ();
exit (1);
}
args_info->proxyport_given = 1;
args_info->proxyport_arg = atoi (optarg);
break;
case 'd': /* Destination host to built the tunnel to. */
if (args_info->desthost_given)
{
fprintf (stderr, "%s: `--desthost' (`-d') option given more than once\n", PACKAGE);
clear_args ();
exit (1);
}
args_info->desthost_given = 1;
args_info->desthost_arg = gengetopt_strdup (optarg);
break;
case 'D': /* Destination host portnumber to built the tunnel to. */
if (args_info->destport_given)
{
fprintf (stderr, "%s: `--destport' (`-D') option given more than once\n", PACKAGE);
clear_args ();
exit (1);
}
args_info->destport_given = 1;
args_info->destport_arg = atoi (optarg);
break;
case 'n': /* Turn on resolve to Dotted Quad */
args_info->dottedquad_flag = !(args_info->dottedquad_flag);
break;
case 'v': /* Turn on verbosity. */
args_info->verbose_flag = !(args_info->verbose_flag);
break;
case 'q': /* Suppress messages -- Quiet mode */
args_info->quiet_flag = !(args_info->quiet_flag);
break;
case 0: /* Long option with no short option */
case '?': /* Invalid option. */
/* `getopt_long' already printed an error message. */
exit (1);
default: /* bug: option not considered. */
fprintf (stderr, "%s: option unknown: %c\n", PACKAGE, c);
abort ();
} /* switch */
} /* while */
if (! args_info->proxyhost_given)
{
fprintf (stderr, "%s: `--proxyhost' (`-g') option required!\n", PACKAGE);
missing_required_options = 1;
}
if (! args_info->proxyport_given)
{
fprintf (stderr, "%s: `--proxyport' (`-G') option required!\n", PACKAGE);
missing_required_options = 1;
}
if (! args_info->desthost_given)
{
fprintf (stderr, "%s: `--desthost' (`-d') option required!\n", PACKAGE);
missing_required_options = 1;
}
if (! args_info->destport_given)
{
fprintf (stderr, "%s: `--destport' (`-D') option required!\n", PACKAGE);
missing_required_options = 1;
}
if ( missing_required_options )
exit (1);
return 0;
}
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