2 # updown script setting inbound marks on ESP traffic in the mangle chain
4 # Copyright (C) 2003-2004 Nigel Meteringham
5 # Copyright (C) 2003-2004 Tuomo Soini
6 # Copyright (C) 2002-2004 Michael Richardson
7 # Copyright (C) 2005-2010 Andreas Steffen <andreas.steffen@strongswan.org>
9 # This program is free software; you can redistribute it and/or modify it
10 # under the terms of the GNU General Public License as published by the
11 # Free Software Foundation; either version 2 of the License, or (at your
12 # option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
14 # This program is distributed in the hope that it will be useful, but
15 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 # CAUTION: Installing a new version of strongSwan will install a new
20 # copy of this script, wiping out any custom changes you make. If
21 # you need changes, make a copy of this under another name, and customize
22 # that, and use the (left/right)updown parameters in ipsec.conf to make
23 # strongSwan use yours instead of this default one.
25 # things that this script gets (from ipsec_pluto(8) man page)
28 # indicates what version of this interface is being
29 # used. This document describes version 1.1. This
30 # is upwardly compatible with version 1.0.
33 # specifies the name of the operation to be performed
34 # (prepare-host, prepare-client, up-host, up-client,
35 # down-host, or down-client). If the address family
36 # for security gateway to security gateway communica-
37 # tions is IPv6, then a suffix of -v6 is added to the
41 # is the name of the connection for which we are
45 # is the next hop to which packets bound for the peer
49 # is the name of the ipsec interface to be used.
52 # is the requid of the ESP policy
55 # is the IP address of our host.
58 # is the ID of our host.
61 # is the IP address / count of our client subnet. If
62 # the client is just the host, this will be the
63 # host's own IP address / max (where max is 32 for
64 # IPv4 and 128 for IPv6).
67 # is the IP address of our client net. If the client
68 # is just the host, this will be the host's own IP
71 # PLUTO_MY_CLIENT_MASK
72 # is the mask for our client net. If the client is
73 # just the host, this will be 255.255.255.255.
76 # if non-empty, then the source address for the route will be
77 # set to this IP address.
80 # is the IP protocol that will be transported.
83 # is the UDP/TCP port to which the IPsec SA is
84 # restricted on our side.
87 # is the IP address of our peer.
90 # is the ID of our peer.
93 # is the CA which issued the cert of our peer.
96 # is the IP address / count of the peer's client sub-
97 # net. If the client is just the peer, this will be
98 # the peer's own IP address / max (where max is 32
99 # for IPv4 and 128 for IPv6).
101 # PLUTO_PEER_CLIENT_NET
102 # is the IP address of the peer's client net. If the
103 # client is just the peer, this will be the peer's
106 # PLUTO_PEER_CLIENT_MASK
107 # is the mask for the peer's client net. If the
108 # client is just the peer, this will be
111 # PLUTO_PEER_PROTOCOL
112 # is the IP protocol that will be transported.
115 # is the UDP/TCP port to which the IPsec SA is
116 # restricted on the peer side.
119 # is an optional user ID employed by the XAUTH protocol
122 # is an optional XFRM mark set on the inbound IPsec SA
125 # is an optional XFRM mark set on the outbound IPsec SA
128 # contains the remote UDP port in the case of ESP_IN_UDP
132 # define a minimum PATH environment in case it is not set
133 PATH="/sbin:/bin:/usr/sbin:/usr/bin:/usr/sbin"
140 iptables:iptables) # due to (left/right)firewall; for default script only
142 custom:*) # custom parameters (see above CAUTION comment)
144 *) echo "$0: unknown parameters \`$*'" >&2
149 # utility functions for route manipulation
150 # Meddling with this stuff should not be necessary and requires great care.
162 if ! ip -o route get ${PLUTO_MY_SOURCEIP%/*} | grep -q ^local
164 it="ip addr add ${PLUTO_MY_SOURCEIP%/*}/32 dev $PLUTO_INTERFACE"
165 oops="`eval $it 2>&1`"
167 if test " $oops" = " " -a " $st" != " 0"
169 oops="silent error, exit status $st"
171 if test " $oops" != " " -o " $st" != " 0"
173 echo "$0: addsource \`$it' failed ($oops)" >&2
182 if [ -z "$PLUTO_MY_SOURCEIP" ]
184 for dir in /etc/sysconfig /etc/conf.d; do
185 if [ -f "$dir/defaultsource" ]
187 . "$dir/defaultsource"
191 if [ -n "$DEFAULTSOURCE" ]
193 PLUTO_MY_SOURCEIP=$DEFAULTSOURCE
197 if [ -z "$KLIPS" -a -z "$PLUTO_MY_SOURCEIP" ]
199 # leave because no route entry is required
203 parms1="$PLUTO_PEER_CLIENT"
205 if [ -n "$PLUTO_NEXT_HOP" ]
207 parms2="via $PLUTO_NEXT_HOP"
209 parms2="via $PLUTO_PEER"
211 parms2="$parms2 dev $PLUTO_INTERFACE"
214 if [ -n "$PLUTO_MY_SOURCEIP" ]
219 if ! ip rule list | grep -q "lookup $SOURCEIP_ROUTING_TABLE"
221 ip rule add pref $SOURCEIP_ROUTING_TABLE_PRIO table $SOURCEIP_ROUTING_TABLE
224 parms3="$parms3 src ${PLUTO_MY_SOURCEIP%/*} table $SOURCEIP_ROUTING_TABLE"
227 case "$PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK" in
229 # opportunistic encryption work around
230 # need to provide route that eclipses default, without
232 it="ip route $1 0.0.0.0/1 $parms2 $parms3 &&
233 ip route $1 128.0.0.0/1 $parms2 $parms3"
235 *) it="ip route $1 $parms1 $parms2 $parms3"
238 oops="`eval $it 2>&1`"
240 if test " $oops" = " " -a " $st" != " 0"
242 oops="silent error, exit status $st"
244 if test " $oops" != " " -o " $st" != " 0"
246 echo "$0: doroute \`$it' failed ($oops)" >&2
251 SAME_NET=$PLUTO_PEER_CLIENT
252 IN_NET=$PLUTO_MY_CLIENT
253 OUT_NET="10.8.0.0/14"
255 # define internal interface
258 # is there an inbound mark to be set?
259 if [ -n "$PLUTO_MARK_IN" ]
261 if [ -n "$PLUTO_UDP_ENC" ]
263 SET_MARK_IN="-p udp --sport $PLUTO_UDP_ENC"
267 SET_MARK_IN="$SET_MARK_IN -s $PLUTO_PEER -j MARK --set-mark $PLUTO_MARK_IN"
270 # is there an outbound mark to be set?
271 if [ -n "$PLUTO_MARK_OUT" ]
273 SET_MARK_OUT="-i $INT_INTERFACE -s $SAME_NET -d $OUT_NET -j MARK --set-mark $PLUTO_MARK_OUT"
276 # resolve octal escape sequences
277 PLUTO_MY_ID=`printf "$PLUTO_MY_ID"`
278 PLUTO_PEER_ID=`printf "$PLUTO_PEER_ID"`
281 case "$PLUTO_VERB:$1" in
282 prepare-host:*|prepare-client:*)
283 if [ -z "$KLIPS" -a -z "$PLUTO_MY_SOURCEIP" ]
285 # exit because no route will be added,
286 # so that existing routes can stay
290 # delete possibly-existing route (preliminary to adding a route)
291 case "$PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK" in
293 # need to provide route that eclipses default, without
297 it="ip route delete $parms1 2>&1 ; ip route delete $parms2 2>&1"
298 oops="`ip route delete $parms1 2>&1 ; ip route delete $parms2 2>&1`"
301 parms="$PLUTO_PEER_CLIENT"
302 it="ip route delete $parms 2>&1"
303 oops="`ip route delete $parms 2>&1`"
307 if test " $oops" = " " -a " $status" != " 0"
309 oops="silent error, exit status $status"
312 *'RTNETLINK answers: No such process'*)
313 # This is what route (currently -- not documented!) gives
314 # for "could not find such a route".
319 if test " $oops" != " " -o " $status" != " 0"
321 echo "$0: \`$it' failed ($oops)" >&2
325 route-host:*|route-client:*)
326 # connection to me or my client subnet being routed
329 unroute-host:*|unroute-client:*)
330 # connection to me or my client subnet being unrouted
334 # connection to my client subnet coming up
335 # If you are doing a custom version, firewall commands go here.
336 if [ -n "$PLUTO_MARK_IN" ]
338 iptables -t mangle -A PREROUTING $SET_MARK_IN
339 iptables -t nat -A PREROUTING -i $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_IN \
340 -d $IN_NET -j NETMAP --to $SAME_NET
341 iptables -I FORWARD 1 -i $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_IN -j ACCEPT
342 iptables -t nat -A POSTROUTING -o $INT_INTERFACE -m mark --mark $PLUTO_MARK_IN \
343 -s $SAME_NET -j NETMAP --to $OUT_NET
345 if [ -n "$PLUTO_MARK_OUT" ]
347 iptables -t mangle -A PREROUTING $SET_MARK_OUT
348 iptables -t nat -A PREROUTING -i $INT_INTERFACE -m mark --mark $PLUTO_MARK_OUT \
349 -d $OUT_NET -j NETMAP --to $SAME_NET
350 iptables -I FORWARD 1 -o $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_OUT -j ACCEPT
351 iptables -t nat -A POSTROUTING -o $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_OUT \
352 -s $SAME_NET -j NETMAP --to $IN_NET
356 # connection to my client subnet going down
357 # If you are doing a custom version, firewall commands go here.
358 if [ -n "$PLUTO_MARK_IN" ]
360 iptables -t mangle -D PREROUTING $SET_MARK_IN
361 iptables -t nat -D PREROUTING -i $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_IN \
362 -d $IN_NET -j NETMAP --to $SAME_NET
363 iptables -D FORWARD -i $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_IN -j ACCEPT
364 iptables -t nat -D POSTROUTING -o eth1 -m mark --mark $PLUTO_MARK_IN \
365 -s $SAME_NET -j NETMAP --to $OUT_NET
367 if [ -n "$PLUTO_MARK_OUT" ]
369 iptables -t mangle -D PREROUTING $SET_MARK_OUT
370 iptables -D FORWARD -o $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_OUT -j ACCEPT
373 *) echo "$0: unknown verb \`$PLUTO_VERB' or parameter \`$1'" >&2