#!/bin/bash
# Copyright (C) 2008-2011, Parallels, Inc. All rights reserved.
#
# Update ARP table for all containers on interface up

[ ! -f /proc/vz/veip ] && exit 0

usage()
{
	echo "Usage: $(basename $0) DEVICE" 1>&2
	exit 1
}

# Supplied interface name
DEV=$1
[ -z "${DEV}" ] && usage

test -f @SCRIPTDIR@/vps-functions || exit 1
test -f @PKGCONFDIR@/vz.conf || exit 1
. @SCRIPTDIR@/vps-functions
. @PKGCONFDIR@/vz.conf

update_arp()
{
	local veip
	for veip in $(awk '!/^Version/ { print $1 }' /proc/vz/veip); do
		[ "$NEIGHBOUR_DEVS" = 'detect' ] && vzdelrouting "${veip}"
		vzarp add ${veip}
		[ "$NEIGHBOUR_DEVS" = 'detect' ] && vzaddrouting "${veip}"
	done
}

# Get possible interface names
vzgetnetdev
[ -z "${NETDEVICES}" ] && exit 0

# Check if a device name given is in the list returned by vzgetnetdev
# Indeed we do not want to add arp entries for e.g. 'lo'
echo "${NETDEVICES}" | grep -qw "${DEV}" || exit 0

NETDEVICES="${DEV}"
update_arp
exit 0
