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@bwesterb
Created March 2, 2021 19:07
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#!/bin/bash
#============================================================================
# ${XEN_SCRIPT_DIR}/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 ${XEN_CONFIG_DIR}/xend-config.sxp. If the script is specified in
# neither of those places, then vif-bridge is the default.
#
# Usage:
# vif-route (add|remove|online|offline)
#
# Environment vars:
# dev vif interface name (required).
# XENBUS_PATH path to this device's details in the XenStore (required).
#
# Read from the store:
# ip list of IP networks for the vif, space-separated (default given in
# this script).
#============================================================================
dir=$(dirname "$0")
. "${dir}/vif-common.sh"
ip6_of()
{
ip -6 addr show "$1" | perl -wane '/scope global/ && /inet6 (([0-9a-f]+:*)+)/ && print $1;'
}
dom0_ip6()
{
local nd=${netdev:-eth0}
local result=$(ip6_of "$nd")
if [ -z "$result" ]
then
""
else
echo "$result"
fi
}
is_ipv6()
{
echo "$1" | perl -wane '/:/ && print "yes"'
}
main_ip=$(dom0_ip)
main_ip6=$(dom0_ip6)
case "${command}" in
online)
ifconfig ${dev} 10.0.0.1 netmask 255.255.255.255 up
if [ ! -z "${main_ip6}" ]; then
ip -6 addr add ${main_ip6} dev ${vif}
fi
echo 1 >/proc/sys/net/ipv4/conf/${dev}/proxy_arp
ipcmd='add'
cmdprefix=''
;;
offline)
do_without_error ifdown ${dev}
ipcmd='del'
cmdprefix='do_without_error'
;;
add) # workaround
exit
;;
del) # workaround
exit
;;
esac
if [ "${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 ${ip} ; do
result=$(is_ipv6 "${addr}")
if [ -z "${result}" ] ; then
${cmdprefix} ip route ${ipcmd} ${addr} dev ${dev} src ${main_ip}
else
${cmdprefix} ip -6 route ${ipcmd} ${addr} dev ${dev} src ${main_ip6}
fi
done
fi
handle_iptable
call_hooks vif post
log debug "Successful vif-route ${command} for ${dev}."
if [ "${command}" = "online" ]
then
success
fi
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