#!/bin/sh
#
# DHCP leasing sccript
#
# $1 - action, "add", "del", "old"
# $2 - MAC address
# $3 - IP address
# $4 - hostname
#
# available environment variables:
#		DNSMASQ_CLIENT_ID
#		DNSMASQ_DOMAIN
#		DNSMASQ_VENDOR_CLASS
#		DNSMASQ_SUPPLIED_HOSTNAME
#		DNSMASQ_USER_CLASS0 .. DNSMASQ_USER_CLASSn
#		DNSMASQ_LEASE_LENGTH
#		DNSMASQ_LEASE_EXPIRES
#		DNSMASQ_TIME_REMAINING
#		DNSMASQ_OLD_HOSTNAME (old)
#		DNSMASQ_INTERFACE
#		DNSMASQ_RELAY_ADDRESS
#		DNSMASQ_TAGS

ACTION=$1
MAC=$2
IP=$3
HOSTNAME=$4


DHCP_LEASE_INFO=/tmp/dhcp_lease.cfg


#
lease_file_chk()
{
	if ! [ -f $DHCP_LEASE_INFO ] ; then
		echo "!"	> $DHCP_LEASE_INFO
	fi
}

#
lease_event_send()
{
	if [ -x "/usr/sbin/libmapi_event_cli" ] ; then
	    IF=`mac2phyport.sh $MAC`
	    echo $IF | grep wlan
	    if [ "$?" != "1" ]; then
			# update hostname for wireless history list.
			band="0 1"
			apidx="0 1"
			for i in $band ; do
				for j in $apidx ; do
					WL_HIS_FILE="/tmp/etc/config/wl_clt_his$i$j"
					HST="$MAC*$HOSTNAME"
					CHK=`cat $WL_HIS_FILE | grep $MAC`
					if [ $CHK != $HST ] ; then
						sed -i "s/$CHK/$HST/g" $WL_HIS_FILE
					fi
				done
			done
        fi
	fi
}

#
lease_update()
{
	lease_file_chk

	OLD_IP=`umngcli -f $DHCP_LEASE_INFO get ip@${MAC}`
	OLD_MAC=`umngcli -f $DHCP_LEASE_INFO get ${IP}@ip`
	umngcli -f $DHCP_LEASE_INFO unset *@${MAC}
	if [ -n "${OLD_MAC}" ] ; then
		umngcli -f $DHCP_LEASE_INFO unset *@${OLD_MAC}
	fi
	if [ -n "${OLD_IP}" ] ; then
		umngcli -f $DHCP_LEASE_INFO unset ${OLD_IP}@ip
	fi

	INTF=`/usr/sbin/mac2phyport.sh ${MAC}`
	if [ -z "$INTF" ] ; then
		INTF=$DNSMASQ_INTERFACE
	fi

	umngcli -f $DHCP_LEASE_INFO set ip@${MAC}="$IP"
	umngcli -f $DHCP_LEASE_INFO set hostname@${MAC}="$HOSTNAME"
	umngcli -f $DHCP_LEASE_INFO set uptime@${MAC}="`cut -d ' ' -f 1 /proc/uptime`"
	umngcli -f $DHCP_LEASE_INFO set intf@${MAC}="$INTF"
	if [ -n "$DNSMASQ_CLIENT_ID" ] ; then
		umngcli -f $DHCP_LEASE_INFO set client_id@${MAC}="$DNSMASQ_CLIENT_ID"
	fi
	if [ -n "$DNSMASQ_DOMAIN" ] ; then
		umngcli -f $DHCP_LEASE_INFO set domain@${MAC}="$DNSMASQ_DOMAIN"
	fi
	if [ -n "$DNSMASQ_VENDOR_CLASS" ] ; then
		umngcli -f $DHCP_LEASE_INFO set vendorclass@${MAC}="$DNSMASQ_VENDOR_CLASS"
	fi
	if [ -n "$DNSMASQ_SUPPLIED_HOSTNAME" ] ; then
		umngcli -f $DHCP_LEASE_INFO set supplied_hostname@${MAC}="$DNSMASQ_SUPPLIED_HOSTNAME"
	fi
	if [ -n "$DNSMASQ_USER_CLASS0" ] ; then
		umngcli -f $DHCP_LEASE_INFO set userclass0@${MAC}="$DNSMASQ_USER_CLASS0"
	fi
	if [ -n "$DNSMASQ_USER_CLASS1" ] ; then
		umngcli -f $DHCP_LEASE_INFO set userclass0@${MAC}="$DNSMASQ_USER_CLASS1"
	fi
	if [ -n "$DNSMASQ_USER_CLASS2" ] ; then
		umngcli -f $DHCP_LEASE_INFO set userclass0@${MAC}="$DNSMASQ_USER_CLASS2"
	fi
	if [ -n "$DNSMASQ_USER_CLASS3" ] ; then
		umngcli -f $DHCP_LEASE_INFO set userclass0@${MAC}="$DNSMASQ_USER_CLASS3"
	fi
	if [ -n "$DNSMASQ_LEASE_EXPIRES" ] ; then
		umngcli -f $DHCP_LEASE_INFO set lease_expires@${MAC}="$DNSMASQ_LEASE_EXPIRES"
	fi
	if [ -n "$DNSMASQ_LEASE_LENGTH" ] ; then
		umngcli -f $DHCP_LEASE_INFO set lease_length@${MAC}="$DNSMASQ_LEASE_LENGTH"
	fi
	if [ -n "$DNSMASQ_TIME_REMAINING" ] ; then
		umngcli -f $DHCP_LEASE_INFO set time_remain@${MAC}="$DNSMASQ_TIME_REMAINING"
	fi
	if [ -n "$DNSMASQ_OLD_HOSTNAME" ] ; then
		umngcli -f $DHCP_LEASE_INFO set old_hostname@${MAC}="$DNSMASQ_OLD_HOSTNAME"
	fi
	if [ -n "$DNSMASQ_TAGS" ] ; then
		umngcli -f $DHCP_LEASE_INFO set tags@${MAC}="$DNSMASQ_TAGS"
	fi

	umngcli -f $DHCP_LEASE_INFO set ${IP}@ip="${MAC}"

	lease_event_send
}

#
lease_del()
{
	lease_file_chk

	umngcli -f $DHCP_LEASE_INFO unset *@${MAC}
	umngcli -f $DHCP_LEASE_INFO unset ${IP}@ip

	lease_event_send
}


case "$ACTION" in
	"add")	lease_update	;;
	"old")	lease_update	;;
	"del")	lease_del		;;
	*)		exit 1			;;
esac

exit 0