#!/bin/bash
# bridge_virtualbox <machine>
# 
# Make all to Host Interface (bridge mode) works.
# Get up the virtual machine with HeadLess mode.
####################################################


##################################
#TODO: make any interface works
##################################
#if [ "$1" ];then
#	echo "utilizando $1"
#	IFACE=$1
#else
#	echo "utilizando eth0"
#	IFACE=eth0
#fi 
##################################

#general variables
DIR="/home/kessia/scripts" #change that to your path
VBOX_DIR="/opt/virtualbox" 
VM="none"
VMS=`VBoxManage list vms|grep Name|grep -v UUID|awk -F: '{print $2}'`
IFACE="eth0"
CUR_USER=`whoami`

# dont run it with root!
if [ "$CUR_USER" == root ];then
	echo
	echo "Duh!"
	echo "Please, be a normal user to run that."
	echo "Don't run with root!"
	echo
	exit
fi

if [ "$1" ];then
    case "$1" in
		-h | --help) # some help to execute the script
	
			cat - <<-FIM

			Make the host IFACE network up.
			Turn on the [tun] module and get up the virtual [tap0] interface.
			Makes a bridge with fisical and the virtual  network adapter.

			Usage:  bridge_virtualbox <machine>
					bridge_virtualbox --help

			List of disponible Virtual Machines:
			FIM
            # list all VM's avaliable
			LD_LIBRARY_PATH=$VBOX_DIR $VBOX_DIR/VBoxManage list vms|grep Name|grep -v UUID|awk -F" " '{ print "\t"NR".",$2 }' 
			echo
		;;
		-*)
			echo "Wrong parameter!"
			echo "Read with carefull!"
			$DIR/bridge_virtualbox -h
		;;
        *) #do the magic!
            # check if parameter if right
            for machine in $VMS;do
                if [ "$1" == "$machine" ];then
                    VM=$machine
                    break
                fi
            done
            if [ "$VM" != "none" ];then
                # make all described in:
                # http://even.archlinux-br.org/blog/virtualbox-configuracoes-de-rede
		        su root -c "
		            modprobe tun
		            if [ ! -e /dev/net/tun ];then
		                mkdir -p /dev/net
		                mknod /dev/net/tun c 10 200 
		            fi
		            chown root.vboxusers /dev/net/tun
		            chmod 0660 /dev/net/tun
		            tunctl -b -t tap0 -u kessia
		            brctl addbr br0
		            ifconfig $IFACE 0.0.0.0 promisc
		            brctl addif br0 $IFACE
		            pkill -9 dhcpcd
		            sleep 2
		            dhcpcd -t 30 -h rainbows br0
		            brctl addif br0 tap0
		            ifconfig tap0 up 1>/dev/null
		        "
                # get up!
		        LD_LIBRARY_PATH=$VBOX_DIR $VBOX_DIR/VBoxHeadless -startvm "$VM" &
	        else
	            echo "This machine doesn't exists!"
	            $DIR/bridge_virtualbox -h
            fi
        ;;
    esac
else
	$DIR/bridge_virtualbox -h
fi