#!/bin/sh
<<'LICENSE'
  Part of AREDN -- Used for creating Amateur Radio Emergency Data Networks
  Copyright (C) 2015 Joe Ayers  ae6xe@arrl.net
   See Contributors file for additional contributors

  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 version 3 of the License.

  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/>.

  Additional Terms:

  Additional use restrictions exist on the AREDN(TM) trademark and logo.
    See AREDNLicense.txt for more info.

  Attributions to the AREDN Project must be retained in the source code.
  If importing this code into a new or existing project attribution
  to the AREDN project must be added to the source code.

  You must not misrepresent the origin of the material conained within.

  Modified versions must be modified to attribute to the original source
  and be marked in reasonable ways as differentiate it from the original
  version.

LICENSE
# This script assumes a pre-existing OpenWRT-UCI netfilter table structure 
# $1 = tun0 | tun1 | ... | tun9
# $2 = up | down

interface=$1
action=$2
configmode=$(uci -q -c /etc/local/uci/ get hsmmmesh.settings.config)
echo "Firewall rules for $interface $action"

# Do nothing if node is not in mesh mode
if [ "$configmode" != "mesh" ] ; then exit 0; fi

if [ "$action" = "up" ] ; then
	# Adding route policies for tunnel interface
	# identical to hotplug for dtdlink
	if ( ! ip rule list | egrep "^20020:.*$interface.*30" > /dev/null ) then
	    if [ -e /etc/config/dmz-mode ] ; then
      	        ip rule add pref 20010 iif "$interface" lookup 29 # local interfaces
      	    fi
            ip rule add pref 20020 iif "$interface" lookup 30 # mesh
	    ip rule add pref 20080 iif "$interface" lookup 31 # gateway
	    ip rule add pref 20090 iif "$interface" lookup main 
            ip rule add pref 20099 iif "$interface" unreachable
        fi
else
    # Remove route policies for tunnel interface
    ip rule del pref 20010 iif "$interface" lookup 29
    ip rule del pref 20020 iif "$interface" lookup 30
    ip rule del pref 20080 iif "$interface" lookup 31
    ip rule del pref 20090 iif "$interface" lookup main
    ip rule del pref 20099 iif "$interface" unreachable
fi

exit 0;