#! /bin/bash
#     The Shoreline Firewall (Shorewall) Packet Filtering Firewall - V4.5
#
#     (c) 2012-2014 - Tom Eastep (teastep@shorewall.net)
#
#       On most distributions, this file should be called /etc/init.d/shorewall.
#
#       Complete documentation is available at http://shorewall.net
#
#       This program is part of Shorewall.
#
#	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, see <http://www.gnu.org/licenses/>.
#
#########################################################################################
# set the STATEDIR variable
setstatedir() {
    local statedir
    if [ -f ${CONFDIR}/${PRODUCT}/vardir ]; then
	statedir=$( . /${CONFDIR}/${PRODUCT}/vardir && echo $VARDIR )
    fi

    [ -n "$statedir" ] && STATEDIR=${statedir} || STATEDIR=${VARLIB}/${PRODUCT}

    if [ $PRODUCT = shorewall -o $PRODUCT = shorewall6 ]; then
	${SBINDIR}/$PRODUCT ${OPTIONS} compile -c || exit 1
    fi
}

#
# This is modified by the installer when ${SHAREDIR} <> /usr/share
#
. /usr/share/shorewall/shorewallrc

# check if shorewall-init is configured or not
if [ -f "$SYSCONFDIR/shorewall-init" ]; then
    . $SYSCONFDIR/shorewall-init
    if [ -z "$PRODUCTS" ]; then
        echo "ERROR: No products configured" >&2
	exit 1
    fi
else
    echo "ERROR: ${SYSCONFDIR}/shorewall-init not found" >&2
    exit 1
fi

# Initialize the firewall
shorewall_start () {
  local PRODUCT
  local STATEDIR

  echo -n "Initializing \"Shorewall-based firewalls\": "
  for PRODUCT in $PRODUCTS; do
      setstatedir

      if [ -x ${STATEDIR}/firewall ]; then
          #
	  # Run in a sub-shell to avoid name collisions
	  #
	  (
	      if ! ${STATEDIR}/firewall status > /dev/null 2>&1; then
		  ${STATEDIR}/firewall ${OPTIONS} stop || exit 1
	      else
		  exit 1
	      fi
	  )
      else
          echo ERROR:  ${STATEDIR}/firewall does not exist or is not executable!
	  exit 1
      fi
  done

  if [ -n "$SAVE_IPSETS" -a -f "$SAVE_IPSETS" ]; then
      ipset -R < "$SAVE_IPSETS"
  fi

  return 0
}

# Clear the firewall
shorewall_stop () {
  local PRODUCT
  local STATEDIR

  echo -n "Clearing \"Shorewall-based firewalls\": "
  for PRODUCT in $PRODUCTS; do
      setstatedir

      if [ -x ${STATEDIR}/firewall ]; then
	  ${STATEDIR}/firewall ${OPTIONS} clear || exit 1
      fi
  done

  if [ -n "$SAVE_IPSETS" ]; then
      mkdir -p $(dirname "$SAVE_IPSETS")
      if ipset -S > "${SAVE_IPSETS}.tmp"; then
	  grep -qE -- '^(-N|create )' "${SAVE_IPSETS}.tmp" && mv -f "${SAVE_IPSETS}.tmp" "$SAVE_IPSETS"
      fi
  fi

  return 0
}

case "$1" in
  start)
     shorewall_start
     ;;
  stop)
     shorewall_stop
     ;;
  *)
     echo "Usage: $0 {start|stop}"
     exit 1
esac

exit 0