#!/usr/bin/env bash 

set -eu

set -x

DESC="Test DHCP (serveur:bigboss et client:tiny)"

HELP="
Bigboss et tiny doivent avoir été configurés par baseConfig.
"

resetToDefault() {
	echo
	echo "Reset DHCP"

	vdn-ssh root@bigboss "

        # Création d'une sauvegarde des fichiers originaux
        for i in /etc/dhcp3/dhcpd.conf; do
                [ ! -e \${i}.vdn -a -e $i ] &&
                        cp \${i} \${i}.vdn 
        done

        # Restauration de la sauvegarde

        for i in /etc/dhcp3/dhcpd.conf; do
                [ -e \${i}.vdn ] &&
                        cp \${i}.vdn \${i}
        done

	exit 0
        "

	vdn-ssh root@tiny "

        # Création d'une sauvegarde des fichiers originaux

        for i in /etc/network/interfaces; do
                [ ! -e \${i}.vdn ] &&
                        cp \${i} \${i}.vdn 
        done

        # Restauration de la sauvegarde

        for i in /etc/network/interfaces; do
                [ -e \${i}.vdn ] &&
                        cp \${i}.vdn \${i}
        done
        "


}


testDHCP() {
	echo
	echo "Test de DHCP"

	tinyMAC=$(vdn-ssh root@tiny ifconfig eth1 | grep ether)
	tinyMAC=$(echo "$tinyMAC" | \
		sed -re 's/^.*ether ([[:xdigit:]:]*).*$/\1/')

	vdn-ssh root@bigboss "
		f=/etc/dhcp3/dhcpd.conf
		[ -e /etc/init.d/isc-dhcp-server ] && f=/etc/dhcp/dhcpd.conf
		cat <<-EOF > \$f
		subnet 192.168.30.0 netmask 255.255.255.0 {
		}
		host tiny {
			hardware ethernet ${tinyMAC};
			option host-name tiny;
			fixed-address tiny;
		} 
EOF

                f=/etc/default/isc-dhcp-server
                cat <<-EOF > \$f
INTERFACESv4=\"eth0\"
INTERFACESv6=\"\"
EOF
                
                if [ -e /etc/init.d/dhcp3-server ]; then
                        /etc/init.d/dhcp3-server stop &> /dev/null
                        /etc/init.d/dhcp3-server start
                elif [ -e /etc/init.d/isc-dhcp-server ]; then
                        /etc/init.d/isc-dhcp-server stop &> /dev/null
                        /etc/init.d/isc-dhcp-server start
                fi

                "

	vdn-ssh root@tiny "
		cat <<-EOF > /etc/network/interfaces
		auto lo
		iface lo inet loopback

		auto eth1
		iface eth1 inet dhcp
		EOF

		ifdown eth1
		ifup eth1

		ifconfig eth1 | grep -q 192.168 && echo ok || exit 1
		"


}

run() {
	setErrorHandler
	echoStart

	requireSshGuests bigboss tiny

	resetToDefault
	testDHCP
	resetToDefault

	unsetErrorHandler
	echoDone
}