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+#! /bin/sh
+# iproute2 version, default updown script
+#
+# Copyright (C) 2003-2004 Nigel Meteringham
+# Copyright (C) 2003-2004 Tuomo Soini
+# Copyright (C) 2002-2004 Michael Richardson
+# Copyright (C) 2005-2007 Andreas Steffen <andreas.steffen@strongswan.org>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2 of the License, or (at your
+# option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+# for more details.
+#
+# RCSID $Id: _updown.in 3268 2007-10-08 19:59:18Z andreas $
+
+# CAUTION: Installing a new version of strongSwan will install a new
+# copy of this script, wiping out any custom changes you make. If
+# you need changes, make a copy of this under another name, and customize
+# that, and use the (left/right)updown parameters in ipsec.conf to make
+# strongSwan use yours instead of this default one.
+
+# things that this script gets (from ipsec_pluto(8) man page)
+#
+# PLUTO_VERSION
+# indicates what version of this interface is being
+# used. This document describes version 1.1. This
+# is upwardly compatible with version 1.0.
+#
+# PLUTO_VERB
+# specifies the name of the operation to be performed
+# (prepare-host, prepare-client, up-host, up-client,
+# down-host, or down-client). If the address family
+# for security gateway to security gateway communica­
+# tions is IPv6, then a suffix of -v6 is added to the
+# verb.
+#
+# PLUTO_CONNECTION
+# is the name of the connection for which we are
+# routing.
+#
+# PLUTO_NEXT_HOP
+# is the next hop to which packets bound for the peer
+# must be sent.
+#
+# PLUTO_INTERFACE
+# is the name of the ipsec interface to be used.
+#
+# PLUTO_REQID
+# is the requid of the ESP policy
+#
+# PLUTO_ME
+# is the IP address of our host.
+#
+# PLUTO_MY_ID
+# is the ID of our host.
+#
+# PLUTO_MY_CLIENT
+# is the IP address / count of our client subnet. If
+# the client is just the host, this will be the
+# host's own IP address / max (where max is 32 for
+# IPv4 and 128 for IPv6).
+#
+# PLUTO_MY_CLIENT_NET
+# is the IP address of our client net. If the client
+# is just the host, this will be the host's own IP
+# address.
+#
+# PLUTO_MY_CLIENT_MASK
+# is the mask for our client net. If the client is
+# just the host, this will be 255.255.255.255.
+#
+# PLUTO_MY_SOURCEIP
+# if non-empty, then the source address for the route will be
+# set to this IP address.
+#
+# PLUTO_MY_PROTOCOL
+# is the IP protocol that will be transported.
+#
+# PLUTO_MY_PORT
+# is the UDP/TCP port to which the IPsec SA is
+# restricted on our side.
+#
+# PLUTO_PEER
+# is the IP address of our peer.
+#
+# PLUTO_PEER_ID
+# is the ID of our peer.
+#
+# PLUTO_PEER_CA
+# is the CA which issued the cert of our peer.
+#
+# PLUTO_PEER_CLIENT
+# is the IP address / count of the peer's client sub­
+# net. If the client is just the peer, this will be
+# the peer's own IP address / max (where max is 32
+# for IPv4 and 128 for IPv6).
+#
+# PLUTO_PEER_CLIENT_NET
+# is the IP address of the peer's client net. If the
+# client is just the peer, this will be the peer's
+# own IP address.
+#
+# PLUTO_PEER_CLIENT_MASK
+# is the mask for the peer's client net. If the
+# client is just the peer, this will be
+# 255.255.255.255.
+#
+# PLUTO_PEER_PROTOCOL
+# is the IP protocol that will be transported.
+#
+# PLUTO_PEER_PORT
+# is the UDP/TCP port to which the IPsec SA is
+# restricted on the peer side.
+#
+
+# uncomment to log VPN connections
+VPN_LOGGING=1
+#
+# tag put in front of each log entry:
+TAG=vpn
+#
+# syslog facility and priority used:
+FAC_PRIO=local0.notice
+#
+# to create a special vpn logging file, put the following line into
+# the syslog configuration file /etc/syslog.conf:
+#
+# local0.notice -/var/log/vpn
+
+# in order to use source IP routing the Linux kernel options
+# CONFIG_IP_ADVANCED_ROUTER and CONFIG_IP_MULTIPLE_TABLES
+# must be enabled
+#
+# special routing table for sourceip routes
+SOURCEIP_ROUTING_TABLE=@IPSEC_ROUTING_TABLE@
+#
+# priority of the sourceip routing table
+SOURCEIP_ROUTING_TABLE_PRIO=@IPSEC_ROUTING_TABLE_PRIO@
+
+# check interface version
+case "$PLUTO_VERSION" in
+1.[0|1]) # Older Pluto?!? Play it safe, script may be using new features.
+ echo "$0: obsolete interface version \`$PLUTO_VERSION'," >&2
+ echo "$0: called by obsolete Pluto?" >&2
+ exit 2
+ ;;
+1.*) ;;
+*) echo "$0: unknown interface version \`$PLUTO_VERSION'" >&2
+ exit 2
+ ;;
+esac
+
+# check parameter(s)
+case "$1:$*" in
+':') # no parameters
+ ;;
+iptables:iptables) # due to (left/right)firewall; for default script only
+ ;;
+custom:*) # custom parameters (see above CAUTION comment)
+ ;;
+*) echo "$0: unknown parameters \`$*'" >&2
+ exit 2
+ ;;
+esac
+
+# utility functions for route manipulation
+# Meddling with this stuff should not be necessary and requires great care.
+uproute() {
+ doroute add
+ ip route flush cache
+}
+downroute() {
+ doroute delete
+ ip route flush cache
+}
+
+addsource() {
+ st=0
+ if ! ip -o route get ${PLUTO_MY_SOURCEIP%/*} | grep -q ^local
+ then
+ it="ip addr add ${PLUTO_MY_SOURCEIP%/*}/32 dev $PLUTO_INTERFACE"
+ oops="`eval $it 2>&1`"
+ st=$?
+ if test " $oops" = " " -a " $st" != " 0"
+ then
+ oops="silent error, exit status $st"
+ fi
+ if test " $oops" != " " -o " $st" != " 0"
+ then
+ echo "$0: addsource \`$it' failed ($oops)" >&2
+ fi
+ fi
+ return $st
+}
+
+doroute() {
+ st=0
+
+ if [ -z "$PLUTO_MY_SOURCEIP" ]
+ then
+ if [ -f /etc/sysconfig/defaultsource ]
+ then
+ . /etc/sysconfig/defaultsource
+ fi
+
+ if [ -f /etc/conf.d/defaultsource ]
+ then
+ . /etc/conf.d/defaultsource
+ fi
+
+ if [ -n "$DEFAULTSOURCE" ]
+ then
+ PLUTO_MY_SOURCEIP=$DEFAULTSOURCE
+ fi
+ fi
+
+ if [ -z "$KLIPS" -a -z "$PLUTO_MY_SOURCEIP" ]
+ then
+ # leave because no route entry is required
+ return $st
+ fi
+
+ parms1="$PLUTO_PEER_CLIENT"
+
+ if [ -n "$PLUTO_NEXT_HOP" ]
+ then
+ parms2="via $PLUTO_NEXT_HOP"
+ else
+ parms2="via $PLUTO_PEER"
+ fi
+ parms2="$parms2 dev $PLUTO_INTERFACE"
+
+ parms3=
+ if [ -n "$PLUTO_MY_SOURCEIP" ]
+ then
+ if test "$1" = "add"
+ then
+ addsource
+ if ! ip rule list | grep -q "lookup $SOURCEIP_ROUTING_TABLE"
+ then
+ ip rule add pref $SOURCEIP_ROUTING_TABLE_PRIO table $SOURCEIP_ROUTING_TABLE
+ fi
+ fi
+ parms3="$parms3 src ${PLUTO_MY_SOURCEIP%/*} table $SOURCEIP_ROUTING_TABLE"
+ fi
+
+ case "$PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK" in
+ "0.0.0.0/0.0.0.0")
+ # opportunistic encryption work around
+ # need to provide route that eclipses default, without
+ # replacing it.
+ it="ip route $1 0.0.0.0/1 $parms2 $parms3 &&
+ ip route $1 128.0.0.0/1 $parms2 $parms3"
+ ;;
+ *) it="ip route $1 $parms1 $parms2 $parms3"
+ ;;
+ esac
+ oops="`eval $it 2>&1`"
+ st=$?
+ if test " $oops" = " " -a " $st" != " 0"
+ then
+ oops="silent error, exit status $st"
+ fi
+ if test " $oops" != " " -o " $st" != " 0"
+ then
+ echo "$0: doroute \`$it' failed ($oops)" >&2
+ fi
+ return $st
+}
+
+# in the presence of KLIPS and ipsecN interfaces do not use IPSEC_POLICY
+if [ `echo "$PLUTO_INTERFACE" | grep "ipsec"` ]
+then
+ KLIPS=1
+ IPSEC_POLICY_IN=""
+ IPSEC_POLICY_OUT=""
+else
+ KLIPS=
+ IPSEC_POLICY="-m policy --pol ipsec --proto esp --reqid $PLUTO_REQID"
+ IPSEC_POLICY_IN="$IPSEC_POLICY --dir in"
+ IPSEC_POLICY_OUT="$IPSEC_POLICY --dir out"
+fi
+
+# are there port numbers?
+if [ "$PLUTO_MY_PORT" != 0 ]
+then
+ S_MY_PORT="--sport $PLUTO_MY_PORT"
+ D_MY_PORT="--dport $PLUTO_MY_PORT"
+fi
+if [ "$PLUTO_PEER_PORT" != 0 ]
+then
+ S_PEER_PORT="--sport $PLUTO_PEER_PORT"
+ D_PEER_PORT="--dport $PLUTO_PEER_PORT"
+fi
+
+# the big choice
+case "$PLUTO_VERB:$1" in
+prepare-host:*|prepare-client:*)
+ if [ -z "$KLIPS" -a -z "$PLUTO_MY_SOURCEIP" ]
+ then
+ # exit because no route will be added,
+ # so that existing routes can stay
+ exit 0
+ fi
+
+ # delete possibly-existing route (preliminary to adding a route)
+ case "$PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK" in
+ "0.0.0.0/0.0.0.0")
+ # need to provide route that eclipses default, without
+ # replacing it.
+ parms1="0.0.0.0/1"
+ parms2="128.0.0.0/1"
+ it="ip route delete $parms1 2>&1 ; ip route delete $parms2 2>&1"
+ oops="`ip route delete $parms1 2>&1 ; ip route delete $parms2 2>&1`"
+ ;;
+ *)
+ parms="$PLUTO_PEER_CLIENT"
+ it="ip route delete $parms 2>&1"
+ oops="`ip route delete $parms 2>&1`"
+ ;;
+ esac
+ status="$?"
+ if test " $oops" = " " -a " $status" != " 0"
+ then
+ oops="silent error, exit status $status"
+ fi
+ case "$oops" in
+ *'RTNETLINK answers: No such process'*)
+ # This is what route (currently -- not documented!) gives
+ # for "could not find such a route".
+ oops=
+ status=0
+ ;;
+ esac
+ if test " $oops" != " " -o " $status" != " 0"
+ then
+ echo "$0: \`$it' failed ($oops)" >&2
+ fi
+ exit $status
+ ;;
+route-host:*|route-client:*)
+ # connection to me or my client subnet being routed
+ uproute
+ ;;
+unroute-host:*|unroute-client:*)
+ # connection to me or my client subnet being unrouted
+ downroute
+ ;;
+up-host:)
+ # connection to me coming up
+ # If you are doing a custom version, firewall commands go here.
+ ;;
+down-host:)
+ # connection to me going down
+ # If you are doing a custom version, firewall commands go here.
+ ;;
+up-client:)
+ # connection to my client subnet coming up
+ # If you are doing a custom version, firewall commands go here.
+ ;;
+down-client:)
+ # connection to my client subnet going down
+ # If you are doing a custom version, firewall commands go here.
+ ;;
+up-host:iptables)
+ # connection to me, with (left/right)firewall=yes, coming up
+ # This is used only by the default updown script, not by your custom
+ # ones, so do not mess with it; see CAUTION comment up at top.
+ iptables -I INPUT 1 -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $S_PEER_PORT \
+ -d $PLUTO_ME $D_MY_PORT $IPSEC_POLICY_IN -j ACCEPT
+ iptables -I OUTPUT 1 -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_ME $S_MY_PORT $IPSEC_POLICY_OUT \
+ -d $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $D_PEER_PORT -j ACCEPT
+ #
+ # log IPsec host connection setup
+ if [ $VPN_LOGGING ]
+ then
+ if [ "$PLUTO_PEER_CLIENT" == "$PLUTO_PEER/32" ]
+ then
+ logger -t $TAG -p $FAC_PRIO \
+ "+ `echo -e $PLUTO_PEER_ID` $PLUTO_PEER -- $PLUTO_ME"
+ else
+ logger -t $TAG -p $FAC_PRIO \
+ "+ `echo -e $PLUTO_PEER_ID` $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME"
+ fi
+ fi
+ ;;
+down-host:iptables)
+ # connection to me, with (left/right)firewall=yes, going down
+ # This is used only by the default updown script, not by your custom
+ # ones, so do not mess with it; see CAUTION comment up at top.
+ iptables -D INPUT -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $S_PEER_PORT \
+ -d $PLUTO_ME $D_MY_PORT $IPSEC_POLICY_IN -j ACCEPT
+ iptables -D OUTPUT -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_ME $S_MY_PORT $IPSEC_POLICY_OUT \
+ -d $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $D_PEER_PORT -j ACCEPT
+ #
+ # log IPsec host connection teardown
+ if [ $VPN_LOGGING ]
+ then
+ if [ "$PLUTO_PEER_CLIENT" == "$PLUTO_PEER/32" ]
+ then
+ logger -t $TAG -p $FAC_PRIO -- \
+ "- `echo -e $PLUTO_PEER_ID` $PLUTO_PEER -- $PLUTO_ME"
+ else
+ logger -t $TAG -p $FAC_PRIO -- \
+ "- `echo -e $PLUTO_PEER_ID` $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME"
+ fi
+ fi
+ ;;
+up-client:iptables)
+ # connection to client subnet, with (left/right)firewall=yes, coming up
+ # This is used only by the default updown script, not by your custom
+ # ones, so do not mess with it; see CAUTION comment up at top.
+ if [ "$PLUTO_PEER_CLIENT" != "$PLUTO_MY_SOURCEIP/32" ]
+ then
+ iptables -I FORWARD 1 -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_MY_CLIENT_NET/$PLUTO_MY_CLIENT_MASK $S_MY_PORT \
+ -d $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $D_PEER_PORT \
+ $IPSEC_POLICY_OUT -j ACCEPT
+ iptables -I FORWARD 1 -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $S_PEER_PORT \
+ -d $PLUTO_MY_CLIENT_NET/$PLUTO_MY_CLIENT_MASK $D_MY_PORT \
+ $IPSEC_POLICY_IN -j ACCEPT
+ fi
+ #
+ # a virtual IP requires an INPUT and OUTPUT rule on the host
+ # or sometimes host access via the internal IP is needed
+ if [ -n "$PLUTO_MY_SOURCEIP" -o -n "$PLUTO_HOST_ACCESS" ]
+ then
+ iptables -I INPUT 1 -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $S_PEER_PORT \
+ -d $PLUTO_MY_CLIENT_NET/$PLUTO_MY_CLIENT_MASK $D_MY_PORT \
+ $IPSEC_POLICY_IN -j ACCEPT
+ iptables -I OUTPUT 1 -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_MY_CLIENT_NET/$PLUTO_MY_CLIENT_MASK $S_MY_PORT \
+ -d $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $D_PEER_PORT \
+ $IPSEC_POLICY_OUT -j ACCEPT
+ fi
+ #
+ # log IPsec client connection setup
+ if [ $VPN_LOGGING ]
+ then
+ if [ "$PLUTO_PEER_CLIENT" == "$PLUTO_PEER/32" ]
+ then
+ logger -t $TAG -p $FAC_PRIO \
+ "+ `echo -e $PLUTO_PEER_ID` $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT"
+ else
+ logger -t $TAG -p $FAC_PRIO \
+ "+ `echo -e $PLUTO_PEER_ID` $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT"
+ fi
+ fi
+ ;;
+down-client:iptables)
+ # connection to client subnet, with (left/right)firewall=yes, going down
+ # This is used only by the default updown script, not by your custom
+ # ones, so do not mess with it; see CAUTION comment up at top.
+ if [ "$PLUTO_PEER_CLIENT" != "$PLUTO_MY_SOURCEIP/32" ]
+ then
+ iptables -D FORWARD -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_MY_CLIENT_NET/$PLUTO_MY_CLIENT_MASK $S_MY_PORT \
+ -d $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $D_PEER_PORT \
+ $IPSEC_POLICY_OUT -j ACCEPT
+ iptables -D FORWARD -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $S_PEER_PORT \
+ -d $PLUTO_MY_CLIENT_NET/$PLUTO_MY_CLIENT_MASK $D_MY_PORT \
+ $IPSEC_POLICY_IN -j ACCEPT
+ fi
+ #
+ # a virtual IP requires an INPUT and OUTPUT rule on the host
+ # or sometimes host access via the internal IP is needed
+ if [ -n "$PLUTO_MY_SOURCEIP" -o -n "$PLUTO_HOST_ACCESS" ]
+ then
+ iptables -D INPUT -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $S_PEER_PORT \
+ -d $PLUTO_MY_CLIENT_NET/$PLUTO_MY_CLIENT_MASK $D_MY_PORT \
+ $IPSEC_POLICY_IN -j ACCEPT
+ iptables -D OUTPUT -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_MY_CLIENT_NET/$PLUTO_MY_CLIENT_MASK $S_MY_PORT \
+ -d $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $D_PEER_PORT \
+ $IPSEC_POLICY_OUT -j ACCEPT
+ fi
+ #
+ # log IPsec client connection teardown
+ if [ $VPN_LOGGING ]
+ then
+ if [ "$PLUTO_PEER_CLIENT" == "$PLUTO_PEER/32" ]
+ then
+ logger -t $TAG -p $FAC_PRIO -- \
+ "- `echo -e $PLUTO_PEER_ID` $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT"
+ else
+ logger -t $TAG -p $FAC_PRIO -- \
+ "- `echo -e $PLUTO_PEER_ID` $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT"
+ fi
+ fi
+ ;;
+#
+# IPv6
+#
+prepare-host-v6:*|prepare-client-v6:*)
+ ;;
+route-host-v6:*|route-client-v6:*)
+ # connection to me or my client subnet being routed
+ #uproute_v6
+ ;;
+unroute-host-v6:*|unroute-client-v6:*)
+ # connection to me or my client subnet being unrouted
+ #downroute_v6
+ ;;
+up-host-v6:*)
+ # connection to me coming up
+ # If you are doing a custom version, firewall commands go here.
+ ;;
+down-host-v6:*)
+ # connection to me going down
+ # If you are doing a custom version, firewall commands go here.
+ ;;
+up-client-v6:)
+ # connection to my client subnet coming up
+ # If you are doing a custom version, firewall commands go here.
+ ;;
+down-client-v6:)
+ # connection to my client subnet going down
+ # If you are doing a custom version, firewall commands go here.
+ ;;
+*) echo "$0: unknown verb \`$PLUTO_VERB' or parameter \`$1'" >&2
+ exit 1
+ ;;
+esac
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