#!/bin/sh

###
 #
 # FreeWLAN Addons - http://www.freewlan.info
 #
 # This Script is based on the original La Fonera Firmware version 0.7.1r2
 #
 # 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, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 # MA  02110-1301, USA
 #
 # http://www.gnu.org/copyleft/gpl.html
 #
###

. /etc/functions.sh

config_load router
config_get mode mode mode

if [ "$mode" -eq "1" ]; then
	. /tmp/network-config
	
	TMP_C=/tmp/chilli.conf
	ETC_C=/etc/chilli.conf
	PID_F=/var/run/chilli.pid
	PID_LOOP_F=/var/run/chilli_loop.pid
	LOG_LOOP_F=/var/log/chilli_loop.log
	WANIP="$(ifconfig "$wan_ifname" | grep inet | awk -F'[: ]+' '{print $4}')"
	MAC=$(ifconfig wifi0 | head -n1 | awk '{print $5}'|sed s/:/-/g)
	MAC=${MAC:-fon}
	LOOP=true
	DELAY=86400
	SECONDS=0
	DELAY2=10
	SECONDS2=0
	
	RADIUSSERVER=radius01.fon.com
	RADIUSSECRET=garrafon
	RADIUSADMUSR=chillispot
	RADIUSADMPWD=chillispot
	
	quit()
	{
			LOOP="false"
			circular_log $LOG_LOOP_F "Signal caught. Exiting..."
	}
	
	circular_log() {
			echo "chillispot $(date) $2" >> $1
			tail -24 $1 > $1.tmp
			mv $1.tmp $1
	}
	
	do_reload() {
			[ -f $PID_F ] && kill -HUP $(cat $PID_F) >/dev/null 2>&1
	}
	
	is_alive() {
			if [ ! -f $PID_F ]; then
					echo "dead"
					return 0
			fi
			TEST_PID=$(cat $PID_F)
			if [ ! -d /proc/$TEST_PID ]; then
					rm $PID_F
					echo "dead"
					return 0
			fi
			CANDIDATE=$(cat /proc/$TEST_PID/status | grep Name: | awk '{ print $2 }')
			if [ "$CANDIDATE" = "chilli" ]; then
					echo "alive"
					return 0
			else
					rm $PID_F
					echo "dead"
					return 0
			fi
	}
	
	radconfig() {
		/usr/sbin/chilli_radconfig \
			-c /dev/null \
			--radiusserver1="$RADIUSSERVER" \
			--radiussecret="$RADIUSSECRET" \
			--adminuser="$RADIUSADMUSR" \
			--adminpasswd="$RADIUSADMPWD" \
			--radiusnasid="$MAC" \
			--dhcpif $wifi_ifname \
			> $TMP_C
		[ -n "$(cat $TMP_C)" ] && {
			MD5SUM_TMP=$(md5sum $TMP_C | awk '{ print $1 }')
			MD5SUM_ETC=$(md5sum $ETC_C | awk '{ print $1 }')
			if [ ! "$MD5SUM_TMP" = "$MD5SUM_ETC" ]; then
					rm $ETC_C
					mv $TMP_C $ETC_C
					circular_log $LOG_LOOP_F "RELOAD"
					do_reload
			else
					circular_log $LOG_LOOP_F "NO RELOAD"
			fi
			return 0
		}
		circular_log $LOG_LOOP_F "NO RELOAD"
	}
	
	case $1 in
		restart)
			ALIVE=$(is_alive)
			if [ $ALIVE = "alive" ]; then
					exit 0
			fi
			/sbin/insmod tun >/dev/null 2>&1
			ifconfig $wifi_ifname 0.0.0.0 # deconfigure the wifi interface
			/usr/sbin/chilli \
				--dns1="$WANIP" \
				--dns2="$WANIP" \
				--radiusnasid="$MAC" \
				--dhcpif $wifi_ifname \
				--pidfile=$PID_F
			circular_log $LOG_LOOP_F "RESTART"
			;;
	
		start)
			ALIVE=$(is_alive)
			if [ $ALIVE = "alive" ]; then
					exit 0
			fi
			radconfig
	
			/sbin/ifup hotspot
			/etc/init.d/S60redirect stop
			/sbin/insmod tun >/dev/null 2>&1
			ifconfig $wifi_ifname 0.0.0.0 # deconfigure the wifi interface
			/usr/sbin/chilli \
				--dns1="$WANIP" \
				--dns2="$WANIP" \
				--radiusnasid="$MAC" \
				--dhcpif $wifi_ifname \
				--pidfile=$PID_F
			if [ $? -eq 0 ]; then
					$0 loop &
			fi
			circular_log $LOG_LOOP_F "START"
			;;
		radconfig)
			radconfig
			;;
	
		stop)
			/sbin/ifdown hotspot
			ALIVE=$(is_alive)
			if [ ! $ALIVE = "alive" ]; then
					echo ERROR: chillispot is not running
					[ -f $PID_LOOP_F ] && kill $(cat $PID_LOOP_F) > /dev/null 2>&1
					rm -f $PID_LOOP_F > /dev/null 2>&1
					exit 0
			fi
			[ -f $PID_F ] && kill $(cat $PID_F) >/dev/null 2>&1
			rm -f $PID_F
			[ -f $PID_LOOP_F ] && kill $(cat $PID_LOOP_F) > /dev/null 2>&1
			rm -f $PID_LOOP_F
			circular_log $LOG_LOOP_F "STOP"
			;;
	
		loop)
			trap quit SIGINT SIGTERM SIGHUP SIGKILL
			echo $$ > $PID_LOOP_F
			while [ $LOOP = "true" ] ; do
					sleep 1
					SECONDS=$(expr $SECONDS + 1)
					if [ "$SECONDS" = "$DELAY" ]; then
							radconfig
					fi
					SECONDS2=$(expr $SECONDS2 + 1)
					if [ "$SECONDS2" = "$DELAY2" ]; then
							$0 restart
							SECONDS2=0
					fi
			done
			exit 0
			;;
		reload)
			do_reload
			exit 0
			;;
		alive)
			ALIVE=$(is_alive)
			echo "chillispot is $ALIVE"
			if [ $ALIVE = "alive" ]; then
					exit 1
			fi
			exit 0
			;;
		*)
			echo "usage: $0 (start|stop|radconfig|reload)"
			exit 1
	esac
fi