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|
#!/usr/bin/perl -w
#
# Module: vyatta-vpn-pppoe
#
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# 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.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2006, 2007 Vyatta, Inc.
# All Rights Reserved.
#
# Authors: Stig Thormodsrud
# Date: July 2008
# Description: bring up/down vpn tunnel for pppoe/pppoa interfaces
#
# **** End License ****
#
use lib "/opt/vyatta/share/perl5/";
use VyattaConfig;
use POSIX;
use strict;
use warnings;
my $conf_file = '/etc/ipsec.conf';
my $log_file = '/var/log/pppoe-vpn.log';
sub logit {
my $timestamp = strftime("%Y%m%d-%H:%M.%S", localtime);
open my $fh, ">>", $log_file;
print $fh "$timestamp: ", @_ , "\n";
close $fh;
}
sub find_next_ipsec {
my $list = shift;
my $last = -1;
while ($list =~ s/ipsec([0-9]+)\=\w+\d+//) {
$last = $1 if $1 > $last;
}
return $last + 1;
}
sub is_dup {
my ($line, $intf) = @_;
while ($line =~ s/ipsec[0-9]+\=(\w+\d+)//) {
return 1 if $1 eq $intf;
}
return 0;
}
sub vpn_add_intf {
my ($line, $intf) = @_;
logit("UP $intf");
return (0, $line) if is_dup($line, $intf);
my $intf_list;
my $new_line;
my $defaultroute = '';
if ($line !~ /interfaces\=\"(.*)\"/) {
return (0, $line);
}
$intf_list = $1;
if ($intf_list =~ s/ \%defaultroute//) {
$defaultroute = ' %defaultroute';
}
my $ipsec_num = find_next_ipsec($intf_list);
$intf_list .= " ipsec$ipsec_num\=$intf";
$new_line = " interfaces=\"$intf_list$defaultroute\"";
return (1, $new_line);
}
sub vpn_remove_intf {
my ($line, $intf) = @_;
logit("DOWN $intf");
if ($line =~ s/ipsec[0-9]+\=$intf//) {
return (1, $line);
} else {
return (0, $line);
}
}
my $pppoe_intf = $ARGV[0];
my $mode = $ARGV[1];
my $config = new VyattaConfig;
$config->setLevel("vpn ipsec ipsec-interfaces");
my @ipsec_intfs = $config->returnOrigValues("interface");
#
# done if no vpn interfaces
#
exit 0 if scalar(@ipsec_intfs) == 0;
my $found = 0;
foreach my $intf (@ipsec_intfs) {
$found++ if $pppoe_intf eq $intf;
}
#
# done if interface comming up isn't in vpn ipsec-interfaces
#
exit 0 if $found == 0;
#
# read current ipsec.conf
#
open(my $FD, '<', $conf_file)
or die "Can't open [$conf_file] for read";
my @lines = <$FD>;
close $FD;
my @new_config = ();
my $changed = 0;
foreach my $line (@lines) {
if ($line =~ /interfaces=\"/) {
my $new_line;
if ($mode eq 'up') {
($changed, $new_line) = vpn_add_intf($line, $pppoe_intf);
$new_line .= "\n";
} else {
($changed, $new_line) = vpn_remove_intf($line, $pppoe_intf);
}
push @new_config, $new_line;
chomp $line; chomp $new_line;
logit("replacing [$line]");
logit("with [$new_line]");
} else {
push @new_config, $line;
}
}
exit 0 if $changed == 0;
#
# write out new ipsec.conf
#
my $tmp_conf = "/tmp/ipsec.conf.$$";
open($FD, '>', $tmp_conf)
or die "Can't open [$tmp_conf] for write";
print $FD @new_config;
close $FD;
my ($cmd, $rc);
$cmd = "mv $tmp_conf $conf_file";
$rc =system($cmd);
logit("$cmd = $rc");
$cmd = "/usr/sbin/ipsec setup --start 2> /dev/null";
$rc =system($cmd);
logit("$cmd = $rc");
$cmd = "/usr/sbin/ipsec auto --rereadall 2> /dev/null";
$rc = system($cmd);
logit("$cmd = $rc");
exit 0;
# end of file
|
