#!/bin/sh

###
 #
 # FreeWLAN Addons - http://www.freewlan.info
 #
 # 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
 #
###

THCLVER="1.0"

. /etc/functions.sh
. /tmp/network-config

config_load fon

# private key for fetching the info from the FON server
KEY=/etc/dropbear/key
USER=openwrt
SERVER=download.fon.com
PORT=1937

# gather information about this machine
# gather information about this machine
WLMAC=$( ifconfig wifi0|grep HWaddr|sed -e "s/^.*HWaddr //" |sed -e "s/ //g" ) #$wifi_ifname
WLMAC2=$( ifconfig $lan_ifname|grep HWaddr|sed -e "s/^.*HWaddr //" |sed -e "s/ //g" )
if [ -f /tmp/eth0_mac ]; then
	ETMAC=$(cat /tmp/eth0_mac)
else
	ETMAC=$( ifconfig eth0|grep HWaddr|sed -e "s/^.*HWaddr //" |sed -e "s/ //g" )
fi

# gather information about this machine
FONREV="$(cat /etc/fon_revision)"
FIRMWARE="$(cat /etc/fon_version)"
DEVICE="$(cat /etc/fon_device)"
#CHILLVER="$(ipkg list_installed|grep chillispot| cut -d\  -f3)"
CHILLVER="1.0-1"

record_changes () {
	if [ ! -d /www/updates ]; then
		mkdir /www/updates
	fi
	if [ -s /tmp/thinclient.sh ]; then
		FS=$(ls -l /tmp/$1.sh | tr -s " " | cut -d " " -f 5)
		if [ $FS -gt 35 ]; then
			md5=$(md5sum /tmp/thinclient.sh);
			md5=$(echo $md5|cut -d" " -f1);
			md5sum /www/updates/* | grep -q $md5 || \
			cp /tmp/$1.sh /www/updates/$1-$(date '+%Y%m%d-%H%M').sh
			rm /tmp/thinclient.sh
		fi
	else
		echo "Datei leer oder nicht da. $(date '+%Y%m%d-%H%M')" >> /www/updates/fonupdate.log;
	fi
}

exec_cron_mode () {
	if [ -n "$2" ]; then
		sleep "$((0x$(head -c2 /dev/urandom | hexdump | awk '$2 > 0 {print $2}') % $2))"
	fi

	echo "mode='$1' wlmac='$WLMAC' mac='$ETMAC' fonrev='$FONREV' firmware='$FIRMWARE' chillver='$CHILLVER' thclver='$THCLVER' device='$DEVICE'" | ssh -T ${PORT:+ -p $PORT}${KEY:+ -i $KEY} "${USER}@${SERVER}" > /tmp/thinclient.sh

	if [ -f /etc/debug ]; then
		record_changes 'thinclient'
	fi
}

rm -f /tmp/thinclient.sh
rm -rf /tmp/.ssh
cp -r /etc/dropbear /tmp/.ssh

case "$1" in
	cron)
		exec_cron_mode $1 '1700'
		;;
	force)
		exec_cron_mode 'cron'
		;;
	start)
		exec_cron_mode $1
		;;
	*)
		echo "Usage: `basename $0` {cron|force|start}"
		exit
esac

#. /tmp/.thinclient.sh