#! /bin/bash

controller=`hostname`
switches=`sudo ovs-vsctl list-br`

function host2ip (){
   ip=`grep $1 /etc/hosts |grep -v "ip6"|  awk '{print $1}'`
   echo $ip
}

# link.sh 00:00:00:00:ba:5e:ba:11 1 up

if [ $# != 3 ];then
 echo "usage: $0 <dpid> <port> <up|down>"
 echo " example: $0 00:00:00:00:ba:5e:ba:11 1 up"
 exit
fi

src_dpid=`echo $1 | sed s'/://g'`
src_port=$2
cmd=$3

for s in $switches; do
    dpid=`sudo ovs-ofctl show  $s |grep dpid | awk '{if(match($0,/dpid:[0-9|a-d]*/)){ print substr($0,RSTART+5,RLENGTH)}}'`
    if [  "x$dpid" == "x$src_dpid" ]; then

#       intf=`sudo ovs-ofctl show $s |grep addr | awk -v p=$src_port 'BEGIN {pat="^ "p"\("}
#	$0 ~ pat {w=match ($0, /\(.*\)/); if (w) print substr($0, RSTART+1, RLENGTH-2)}'`

        sudo ovs-ofctl show $s |grep addr | sed 's/[\(\)]/,/g'>/tmp/baz.out
	intf=`cat /tmp/baz.out | awk -v p=$src_port 'BEGIN {pat="^ "p","}
	$0 ~ pat {w=match($0, /,.*,/); if (w) print substr($0, RSTART+1, RLENGTH-2)}'`

	if [ x$intf != "x" ]; then
	        if [ x$cmd == "xup" ]; then
		    echo "sudo ifconfig ${intf}  up"
		    sudo ifconfig ${intf}  up
       		elif [ x$cmd == "xdown" ]; then
		    echo "sudo ifconfig ${intf}  down"
		    sudo ifconfig ${intf}  down
	        else
		    echo "sudo ifconfig ${intf}"
		    sudo ifconfig ${intf} 
		fi
		break
        fi
    fi
done