#! /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 Andreas Steffen # # 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 . # # 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. # 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 # FreeS/WAN 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_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. # # PLUTO_XAUTH_ID # is an optional user ID employed by the XAUTH protocol # # PLUTO_MARK_IN # is an optional XFRM mark set on the inbound IPsec SA # # PLUTO_MARK_OUT # is an optional XFRM mark set on the outbound IPsec SA # # PLUTO_UDP_ENC # contains the remote UDP port in the case of ESP_IN_UDP # encapsulation # # logging of VPN connections # # 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 # # check interface version case "$PLUTO_VERSION" in 1.[0]) # 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 ;; ipfwadm:ipfwadm) # 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 $st } doroute() { st=0 parms="$PLUTO_PEER_CLIENT" parms2= if [ -n "$PLUTO_NEXT_HOP" ] then parms2="via $PLUTO_NEXT_HOP" fi parms2="$parms2 dev $PLUTO_INTERFACE" if [ -z "$PLUTO_MY_SOURCEIP" ] then for dir in /etc/sysconfig /etc/conf.d; do if [ -f "$dir/defaultsource" ] then . "$dir/defaultsource" fi done if [ -n "$DEFAULTSOURCE" ] then PLUTO_MY_SOURCEIP=$DEFAULTSOURCE fi fi parms3= if test "$1" = "add" -a -n "$PLUTO_MY_SOURCEIP" then addsource parms3="$parms3 src ${PLUTO_MY_SOURCEIP%/*}" fi case "$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 $parms $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 $st } # define ESP mark ESP_MARK=50 # add the following static rule to the INPUT chain in the mangle table # iptables -t mangle -A INPUT -p 50 -j MARK --set-mark 50 # NAT traversal via UDP encapsulation is supported with the rule # iptables -t mangle -A INPUT -p udp --dport 4500 -j MARK --set-mark 50 # in the presence of KLIPS and ipsecN interfaces do not use ESP mark rules if [ `echo "$PLUTO_INTERFACE" | grep "ipsec"` ] then CHECK_MARK="" else CHECK_MARK="-m mark --mark $ESP_MARK" fi # are there port numbers? if [ "$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 $PLUTO_PEER_PORT" fi # resolve octal escape sequences PLUTO_MY_ID=`printf "$PLUTO_MY_ID"` PLUTO_PEER_ID=`printf "$PLUTO_PEER_ID"` # the big choice case "$PLUTO_VERB:$1" in prepare-host:*|prepare-client:*) # delete possibly-existing route (preliminary to adding a route) case "$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. 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 $CHECK_MARK -j ACCEPT iptables -I OUTPUT 1 -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \ -s $PLUTO_ME $S_MY_PORT \ -d $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $D_PEER_PORT -j ACCEPT # if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ] then logger -t $TAG -p $FAC_PRIO \ "+ $PLUTO_PEER_ID $PLUTO_PEER -- $PLUTO_ME" else logger -t $TAG -p $FAC_PRIO \ "+ $PLUTO_PEER_ID $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME" fi ;; down-host:*) # connection to me going down # If you are doing a custom version, firewall commands go here. # connection to me going down # If you are doing a custom version, firewall commands go here. 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 $CHECK_MARK -j ACCEPT iptables -D OUTPUT -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \ -s $PLUTO_ME $S_MY_PORT \ -d $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK $D_PEER_PORT -j ACCEPT # if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ] then logger -t $TAG -p $FAC_PRIO -- \ "- $PLUTO_PEER_ID $PLUTO_PEER -- $PLUTO_ME" else logger -t $TAG -p $FAC_PRIO -- \ "- $PLUTO_PEER_ID $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME" fi ;; up-client:) # connection to my client subnet coming up # If you are doing a custom version, firewall commands go here. 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 -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 \ $CHECK_MARK -j ACCEPT # if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ] then logger -t $TAG -p $FAC_PRIO \ "+ $PLUTO_PEER_ID $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT" else logger -t $TAG -p $FAC_PRIO \ "+ $PLUTO_PEER_ID $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT" fi ;; down-client:) # connection to my client subnet going down # If you are doing a custom version, firewall commands go here. 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 -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 \ $CHECK_MARK -j ACCEPT # if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ] then logger -t $TAG -p $FAC_PRIO -- \ "- $PLUTO_PEER_ID $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT" else logger -t $TAG -p $FAC_PRIO -- \ "- $PLUTO_PEER_ID $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT" fi ;; up-client:ipfwadm) # 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. ipfwadm -F -i accept -b -S $PLUTO_MY_CLIENT_NET/$PLUTO_MY_CLIENT_MASK \ -D $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK ;; down-client:ipfwadm) # 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. ipfwadm -F -d accept -b -S $PLUTO_MY_CLIENT_NET/$PLUTO_MY_CLIENT_MASK \ -D $PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK ;; # # 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