#!/usr/bin/perl
use strict;
use Getopt::Long;
use vars qw($VERSION);
$VERSION = '0.03';
# Command-line parameters:
# actions
my ( $_create, $_delete, $_help );
# values
my ( $SERVER, $DOMAIN, $USERNAME, $PASSWORD, $ENCRYPT, $START );
my $result = GetOptions(
"create|c=s" => \$_create, # --create foo -> &create("foo")
"delete=s" => \$_delete, # --delete foo -> &delete("foo")
"help|h" => \$_help, # --help -> &help()
"server|s=s" => \$SERVER,
"domain|d=s" => \$DOMAIN,
"username|u=s" => \$USERNAME,
"password|p=s" => \$PASSWORD,
"encrypt|e" => \$ENCRYPT,
"start" => \$START,
);
if ($_create) {
&create($_create);
} elsif ($_delete) {
&delete($_delete);
} elsif ($_help) {
&help();
} else {
die "$0: too few arguments.\nTry '$0 --help' for more information.\n";
}
exit;
####
sub create {
my $TUNNEL = shift;
# input validation
($TUNNEL) = $TUNNEL =~ m{^(\w+)$}
or die "$0: invalid tunnel name.\nTry '$0 --help' for more information.\n";
($SERVER) = $SERVER =~ m{^(.+)$}
or die "$0: invalid server.\nTry '$0 --help' for more information.\n";
($USERNAME) = $USERNAME =~ m{^(.+)$}
or die "$0: invalid username.\nTry '$0 --help' for more information.\n";
# ask password
if ( !$PASSWORD ) {
print "Password: ";
$PASSWORD = <STDIN>;
$PASSWORD =~ s/([^\x20\x21\x23-\x7e])/sprintf ("\\x%02x", ord ($1))/eg;
}
# put '\' between domain and username IF specified a domain
$DOMAIN = "$DOMAIN\\" if $DOMAIN;
# create or add lines to the /etc/ppp/chap-secrets file,
# which holds usernames and passwords
my $chap_secrets_file = '/etc/ppp/chap-secrets';
umask( 0027 );
open( FILE, ">>", $chap_secrets_file )
or die "$0: can't write to '$chap_secrets_file': $!\n";
print FILE "\n";
print FILE "# added by pptpsetup for $TUNNEL\n";
print FILE "$DOMAIN$USERNAME $TUNNEL \"$PASSWORD\" *\n";
close FILE;
# create a /etc/ppp/peers/$TUNNEL file
my $tunnel_file = "/etc/ppp/peers/$TUNNEL";
open( FILE, ">$tunnel_file" )
or die "$0: can't write to '$tunnel_file': $!\n";
print FILE <<"TUNNEL";
# written by pptpsetup
pty "/usr/sbin/pptp $SERVER --nolaunchpppd"
lock
noauth
nobsdcomp
nodeflate
name $DOMAIN$USERNAME
remotename $TUNNEL
ipparam $TUNNEL
TUNNEL
print FILE "require-mppe-128\n" if $ENCRYPT;
close FILE;
# start tunneling
if ($START) {
system("pppd call $TUNNEL updetach");
}
}
####
sub help {
print <<'EOF';
pptpsetup --create <TUNNEL> --server <SERVER> [--domain <DOMAIN>]
--username <USERNAME> [--password <PASSWORD>]
[--encrypt] [--start]
pptpsetup --delete <TUNNEL>
Options:
* the name you wish to use to refer to the tunnel (you choose it),
* the IP address or host name of the server,
* the authentication domain name (optional),
* the username you are to use,
* the password you are to use,
* whether encryption is required,
* whether to start the connection after configuration.
pptpsetup - Point-to-Point Tunneling Protocol setup
Copyright (C) 2006 Free Software Foundation
pptpsetup comes with ABSOLUTELY NO WARRANTY; for details see source.
This is free software, and you are welcome to redistribute it
under certain conditions; see source for details.
Written by Nelson Ferraz.
EOF
exit;
}
####
sub delete {
my $tunnel = shift;
# input validation
($tunnel) = $tunnel =~ m{^(\w+)$}
or die "$0: invalid tunnel name.\nTry '$0 --help' for more information.\n";
# delete tunnel file
my $tunnel_file = "/etc/ppp/peers/$tunnel";
unlink $tunnel_file
or die "$0: can't delete '$tunnel_file': $!\n";
# delete entry from chap-secrets
my $chap_file = '/etc/ppp/chap-secrets';
my $mode = (stat($chap_file))[2] & 07777;
open( FILE, $chap_file )
or die "$0: can't read '$chap_file': $!\n";
my @chap = <FILE>;
close FILE;
my $new_chap = '';
foreach (@chap) {
$new_chap .= $_ unless /\b$tunnel\b/;
}
# backup
rename( $chap_file, "$chap_file.bkp" );
# write new chap-secrets
open( FILE, ">$chap_file" )
or die "$0: can't write '$chap_file': $!\n";
chmod $mode, $chap_file;
print FILE $new_chap;
close FILE;
exit;
}
__END__
=head1 NAME
pptpsetup - Point-to-Point Tunneling Protocol setup
=head1 SYNOPSIS
pptpsetup --create <TUNNEL> --server <SERVER> [--domain <DOMAIN>]
--username <USERNAME> [--password <PASSWORD>]
[--encrypt] [--start]
pptpsetup --delete <TUNNEL>
=head1 DESCRIPTION
PPTP Client is a Linux, FreeBSD, NetBSD and OpenBSD client for the
proprietary Microsoft Point-to-Point Tunneling Protocol, PPTP.
This script configures PPTP Client on Linux.
=head1 OPTIONS
=over 16
=item --create TUNNEL
create a tunnel named TUNNEL
=item --delete TUNNEL
delete the file /etc/ppp/peers/TUNNEL and any lines from
/etc/ppp/chap-secrets that contains "TUNNEL" as a single word
=item --server SERVER
the IP address or host name of the server
=item --domain DOMAIN
the authentication domain name (optional)
=item --username USERNAME
the username you are to use
=item --password PASSWORD
the password you are to use. If you don't specify a password,
pptpsetup will ask for one.
=item --encrypt
whether encryption is required
=item --start
whether the connection should be started after configuration.
=back
=head1 AUTHOR
Nelson Ferraz <nferraz at gmail.com>,
based on James Cameron's PPTP Client Debian HOWTO.
=head1 SEE ALSO
=over 16
=item PPTP Client Debian HOWTO
http://pptpclient.sourceforge.net/howto-debian.phtml
=item PPTP Client Diagnosis HOWTO
http://pptpclient.sourceforge.net/howto-diagnosis.phtml
=back
=head1 COPYRIGHT
pptpsetup - Point-to-Point Tunneling Protocol setup
Copyright (C) 2006 Nelson Ferraz
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Mini Shell