#!/usr/bin/perl 
################################################## 
#####     VPN-Watch.pl     Version 0.1       ##### 
################################################## 

use strict;

require '/var/ipfire/general-functions.pl';
my @vpnsettings;
my $i = 0;
my $file = "/var/run/vpn-watch.pid";

system("echo $$ > $file");
    
while ( $i == 0){
  if (open(FILE, "${General::swroot}/vpn/config")) {
    @vpnsettings = <FILE>;
    close(FILE);
    unless(@vpnsettings) {exit 1;}
  }

foreach (@vpnsettings){
 my @settings = split(/,/,$_);

  if ($settings[27] ne 'RED'){next;}
  if ($settings[4] ne 'net'){next;}  
  if ($settings[1] ne 'on'){next;}chomp($settings[29]);
  if ($settings[29] ne 'on'){next;}
 
  my $remotehostname = $settings[11];
  my $remoteip = `/usr/bin/ping -c 1 $remotehostname 2>/dev/null | head -n1 | awk '{print \$3}' | tr -d '()' | tr -d ':'`;chomp($remoteip);
  if ($remoteip eq ""){next;}
  if (system("ipsec whack --status | grep $remoteip >/dev/null")){
    logger("Remote IP for host $remotehostname has changed or is not connected, restarting connection to $remoteip.");
    system("/usr/local/bin/ipsecctrl S $settings[0]");
    next;
  }
  my $hostip = `cat /var/ipfire/red/local-ipaddress 2>/dev/null`;
  chomp($hostip);
  if (system("ipsec whack --status | grep $hostip >/dev/null")){
    logger("Our own IP has changed to $hostip restarting connection.");
    system("/usr/local/bin/ipsecctrl S $settings[1]");
    next;}  
  }
  logger("Nothing was done.");
  sleep(300);
}

sub logger {
        my $log = shift;
        system("logger -t vpnwatch \"$log\"");
}