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