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  • Committer: Teddy Hogeborn
  • Date: 2015-07-01 20:01:26 UTC
  • mto: This revision was merged to the branch mainline in revision 759.
  • Revision ID: teddy@recompile.se-20150701200126-qb3f6c3jcas2f4og
mandos-client: Try to start a plugin to add and remove a local route.

* debian/mandos-client.README.Debian: Add setting of environment
                                      variable MANDOSPLUGINHELPERDIR
                                      to command line testing
                                      mandos-client.
* mandos-client.c (raise_privileges): Moved to top of file.
                  (raise_privileges_permanently): - '' -
                  (lower_privileges): - '' -
                  (lower_privileges_permanently): - '' -
  (add_remove_local_route, add_local_route, remove_local_route): New.
  (start_mandos_communication): Set SOCK_CLOEXEC flag on socket.  Run
                                the above functions to add (and
                                remove) local route, if the conditions
                                indicates it could help.
  (run_network_hooks): Use O_DIRECTORY, O_PATH, and O_CLOEXEC flags
                       when opening network hook directory. Do
                       TEMP_FAILURE_RETRY around opening of /dev/null
                       and network hook executables.  Move redirecting
                       of stdout and stderr to as late as possible
                       before fexecve().
  (main): Use O_DIRECTORY and O_PATH when opening temporary directory.
* plugins.d/mandos-client.xml (ENVIRONMENT): Document usage of the
                                             MANDOSPLUGINHELPERDIR
                                             environment variable.

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network-hooks.d/bridge
 
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#!/bin/sh
 
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#
 
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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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# 
 
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# Copyright © 2012 Teddy Hogeborn
 
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# Copyright © 2012 Björn Påhlsson
 
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# 
 
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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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set -e
 
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CONFIG="$MANDOSNETHOOKDIR/bridge.conf"
 
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addrtoif(){
 
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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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}
 
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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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    . "$CONFIG"
 
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fi
 
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if [ -z "$BRIDGE" -o -z "$PORT_ADDRESSES" ]; then
 
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    exit
 
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fi
 
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if [ -n "$DEVICE" ]; then
 
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    case "$DEVICE" in
 
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        *,"$BRIDGE"|*,"$BRIDGE",*|"$BRIDGE",*|"$BRIDGE") :;;
 
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        *) exit;;
 
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    esac
 
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fi
 
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brctl="/sbin/brctl"
 
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for b in "$brctl" /usr/sbin/brctl; do
 
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    if [ -e "$b" ]; then
 
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        brctl="$b"
 
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        break
 
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    fi
 
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done
 
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do_start(){
 
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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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    done
 
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    ip link set dev "$BRIDGE" up
 
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    sleep "${DELAY%%.*}"
 
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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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        done
 
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    fi
 
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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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        done
 
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    fi
 
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}
 
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do_stop(){
 
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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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    done
 
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    "$brctl" delbr "$BRIDGE"
 
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}
 
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case "${MODE:-$1}" in
 
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    start|stop)
 
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        do_"${MODE:-$1}"
 
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        ;;
 
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    files)
 
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        echo /bin/ip
 
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        echo "$brctl"
 
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        ;;
 
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    modules)
 
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        echo bridge
 
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        ;;
 
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esac