#!/bin/bash




#============================================================================
# /etc/xen/vif-route
#
# Script for configuring a vif in routed mode.
# The hotplugging system will call this script if it is specified either in
# the device configuration given to Xend, or the default Xend configuration
# in /etc/xen/xend-config.sxp.  If the script is specified in neither of those
# places, then vif-bridge is the default.
#
# Usage:
# vif-route (add|remove|online|offline)
#
# Environment vars:
# vif         vif interface name (required).
# XENBUS_PATH path to this device's details in the XenStore (required).
# Read from the store:
# ip      list of IP networks for the vif, space-separated (default given in
#         this script).
# V6PREFIX  prefix of v6 address to use
# Note that the v6 support is kind of broken because there's not really a way to populate the v6 prefix
# This script will set up proxy arp  for any ip addresses that are being routed

#============================================================================

dir=$(dirname "$0")
. "$dir/vif-common.sh"

main_ip=$(dom0_ip)

case "$command" in
    online)
        ifconfig ${vif} ${main_ip} netmask 255.255.255.255 up
        echo 1 >/proc/sys/net/ipv4/conf/${vif}/proxy_arp
	echo 1 >/proc/sys/net/ipv4/conf/${vif}/rp_filter 
        ipcmd='add'
        cmdprefix=''
        ;;
    offline)
        do_without_error ifdown ${vif}
	if [ -f /var/run/radvd/radvd.pid.${vif} ] ; then
	    do_without_error kill `cat /var/run/radvd/radvd.pid.${vif}`
	    fi
        ipcmd='del'
        cmdprefix='do_without_error'
        ;;
esac

v6prefix=${v6prefix:-}
v6prefix=$(xenstore_read_default "$XENBUS_PATH/v6prefix" "$v6prefix")

if [ "${ip}" ] ; then
    # If we've been given a list of IP addresses, then add routes from dom0 to
    # the guest using those addresses.
    for addr in ${ip} ; do
      ${cmdprefix} ip route ${ipcmd} ${addr} dev ${vif} src ${main_ip}
      arpspoof -i eth0 ${addr}&
      sleep 5
      kill %arpspoof
    done 
fi

if [ x${v6prefix} != x ] ; then
    sed -e "s/@interface@/${vif}/" -e "s+@prefix@+${v6prefix}+" /etc/xen/radvd.conf.template >/var/run/radvd.conf.${vif}
    ${cmdprefix} ip -6 addr  ${ipcmd}  fe80::/64 scope link  dev ${vif} 
    if [ $1 = online ] ; then
	radvd  -u radvd -C /var/run/radvd.conf.${vif} -p /var/run/radvd/radvd.pid.${vif}
    fi
    ${cmdprefix} ip -6 route ${ipcmd} ${v6prefix} dev ${vif} 
    fi

handle_iptable

log debug "Successful vif-route $command for $vif."
if [ "$command" == "online" ]
then
  success
fi