/mandos/trunk

#!/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 © 2011 Teddy Hogeborn

# Copyright © 2011 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 "$DEVICE" -a "$DEVICE" != "$BRIDGE" ]; then

    exit

fi

brctl="/sbin/brctl"

for b in "$brctl" /usr/sbin/brctl; do

    if [ -e "$b" ]; then

	brctl="$b"

	break

    fi

done

case "$1" in

    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

	;;

    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"

	;;

    files)

	echo /bin/ip

	echo "$brctl"

	;;

    modules)

	echo bridge

	;;

esac