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#!/bin/sh
#
# This is an example of a Mandos client network hook. This hook
# brings up a bridge interface as specified in a separate
# configuration file. To be used, this file and any needed
# configuration file(s) should be copied into the
# /etc/mandos/network-hooks.d directory.
#
# Copyright © 2012 Teddy Hogeborn
# Copyright © 2012 Björn Påhlsson
#
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved. This file is offered as-is,
# without any warranty.
set -e
CONFIG="$MANDOSNETHOOKDIR/bridge.conf"
addrtoif(){
grep -liFe "$1" /sys/class/net/*/address \
| sed -e 's,.*/\([^/]*\)/[^/]*,\1,' -e "/^${BRIDGE}\$/d"
}
# Read config file, which must set "BRIDGE", "PORT_ADDRESSES", and
# optionally "IPADDRS" and "ROUTES".
if [ -e "$CONFIG" ]; then
. "$CONFIG"
fi
if [ -z "$BRIDGE" -o -z "$PORT_ADDRESSES" ]; then
exit
fi
if [ -n "$DEVICE" ]; then
case "$DEVICE" in
*,"$BRIDGE"|*,"$BRIDGE",*|"$BRIDGE",*|"$BRIDGE") :;;
*) exit;;
esac
fi
brctl="/sbin/brctl"
for b in "$brctl" /usr/sbin/brctl; do
if [ -e "$b" ]; then
brctl="$b"
break
fi
done
do_start(){
"$brctl" addbr "$BRIDGE"
for address in $PORT_ADDRESSES; do
interface=`addrtoif "$address"`
"$brctl" addif "$BRIDGE" "$interface"
ip link set dev "$interface" up
done
ip link set dev "$BRIDGE" up
sleep "${DELAY%%.*}"
if [ -n "$IPADDRS" ]; then
for ipaddr in $IPADDRS; do
ip addr add "$ipaddr" dev "$BRIDGE"
done
fi
if [ -n "$ROUTES" ]; then
for route in $ROUTES; do
ip route add "$route" dev "$BRIDGE"
done
fi
}
do_stop(){
ip link set dev "$BRIDGE" down
for address in $PORT_ADDRESSES; do
interface=`addrtoif "$address"`
ip link set dev "$interface" down
"$brctl" delif "$BRIDGE" "$interface"
done
"$brctl" delbr "$BRIDGE"
}
case "${MODE:-$1}" in
start|stop)
do_"${MODE:-$1}"
;;
files)
echo /bin/ip
echo "$brctl"
;;
modules)
echo bridge
;;
esac
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