#!/usr/bin/perl

# Copyright (c) 2010, Wisekuma
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
# 
#     * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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#     * Neither the name of Wisekuma nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
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# Script for snort process control
# Alberto Diaz

use strict;

my $ctlarg = $ARGV[0];
my $pid = "/var/run/snort_fxp1.pid";

if ($ctlarg eq "start"){
   print "Starting Snort\n";
   start();
}
elsif ($ctlarg eq "stop"){
   print "Stopping Snort\n";
   stop();
}
elsif ($ctlarg eq "restart"){
   print "Stopping Snort\n";
   stop();
   print "Starting Snort\n";
   start();
}
elsif ($ctlarg eq "status"){
   print "Snort is " . status() .  "\n";
}
elsif ($ctlarg eq "test"){
   print "Running Snort in testing mode\n";

   exec "/usr/local/bin/snort -c /etc/snort/snort.conf -i fxp1 -T -o -u _snort -g _snort -t /var/snort -l /var/snort/log";
}
else{
   print "Usage: snortclt [ start | stop | restart | status | test ]\n\n";

   print "start\t- Start snort\n";
   print "stop\t- Stop snort\n";
   print "restart\t- Restart snort (stop and start)\n";
   print "status\t- Display status of snort\n";
   print "test\t- Start snort in self-test mode\n\n";
}

sub start(){
   if (-e $pid){
      print "Snort is already running\n";
      exit 0;
   }
   else {
      exec "/usr/local/bin/snort -c /etc/snort/snort.conf -i fxp1 -D -o -u _snort -g _snort -t /var/snort -l /var/snort/log";
   }
}

sub stop(){
   if (-e $pid){
     system "kill -TERM `cat $pid`"; 

     #check that the pid file has being remove. Looks like when running not as root cannot delete the pid file

     sleep (3); 	# wait for a bit before checking
     print "Checking PID files have being removed\n";

     if (-e $pid){
	unlink $pid;
	unlink $pid . ".lck";
     }
   }
   else{
      print "Snort is already stopped\n";
   }
}

sub status (){
   if (-e $pid){
      return "running";
   }
   else {
      return "not running";
   }
}