#!/usr/bin/env bash



  #
  # Copyright (C) 2010 Cloud.com, Inc.  All rights reserved.
  # 
  # This software is licensed under the GNU General Public License v3 or later.
  # 
  # It 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 3 of the License, or 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, see <http://www.gnu.org/licenses/>.
  #
 

# netusage.sh -- create iptable rules to gather network stats, running within DomR
#

source /root/func.sh

lock="biglock"
locked=$(getLockFile $lock)
if [ "$locked" != "1" ]
then
    exit 1
fi

usage() {
  printf "Usage: %s -[c|g|r] [-[a|d] <public interface>]\n" $(basename $0)  >&2
}

create_usage_rules () {
  iptables -N NETWORK_STATS > /dev/null
  iptables -I FORWARD -j NETWORK_STATS > /dev/null
  iptables -I INPUT -j NETWORK_STATS > /dev/null
  iptables -I OUTPUT -j NETWORK_STATS > /dev/null
  iptables -A NETWORK_STATS -i eth0 -o eth2 > /dev/null
  iptables -A NETWORK_STATS -i eth2 -o eth0 > /dev/null
  iptables -A NETWORK_STATS -o eth2 ! -i eth0 -p tcp > /dev/null
  iptables -A NETWORK_STATS -i eth2 ! -o eth0 -p tcp > /dev/null
  return $?
}

add_public_interface () {
  local pubIf=$1
  iptables -A NETWORK_STATS -i eth0 -o $pubIf > /dev/null
  iptables -A NETWORK_STATS -i $pubIf -o eth0 > /dev/null
  iptables -A NETWORK_STATS -o $pubIf ! -i eth0 -p tcp > /dev/null
  iptables -A NETWORK_STATS -i $pubIf ! -o eth0 -p tcp > /dev/null
  return $?
}

delete_public_interface () {
  local pubIf=$1
  echo $pubIf >> /root/removedVifs
  return $?
}

get_usage () {
  iptables -L NETWORK_STATS -n -v -x | awk '$1 ~ /^[0-9]+$/ { printf "%s:", $2}'; /root/clearUsageRules.sh > /dev/null
  if [ $? -gt 0  -a $? -ne 2 ]
  then
     printf $?
     return 1
  fi
}

reset_usage () {
  iptables -Z NETWORK_STATS > /dev/null
  if [ $? -gt 0  -a $? -ne 2 ]
  then
     return 1
  fi
}

#set -x

cflag=
gflag=
rflag=
iflag=
aflag=
dflag=

while getopts 'cgra:d:' OPTION
do
  case $OPTION in
  c)	cflag=1
		;;
  g)	gflag=1
		;;
  r)	rflag=1
		;;
  a)    aflag=1
        publicIf="$OPTARG"
        ;;
  d)    dflag=1
        publicIf="$OPTARG"
        ;;
  ?)	usage
                unlock_exit 2 $lock $locked
		;;
  esac
done

if [ "$cflag" == "1" ] 
then
  create_usage_rules  
  unlock_exit $? $lock $locked
fi

if [ "$gflag" == "1" ] 
then
  get_usage 
  unlock_exit $? $lock $locked
fi

if [ "$rflag" == "1" ] 
then
  reset_usage  
  unlock_exit $? $lock $locked
fi

if [ "$aflag" == "1" ] 
then
  add_public_interface $publicIf 
  unlock_exit $? $lock $locked
fi

if [ "$dflag" == "1" ] 
then
  delete_public_interface $publicIf 
  unlock_exit $? $lock $locked
fi

unlock_exit 0 $lock $locked