/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 © 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