225 lines
7.6 KiB
Bash
Executable File
225 lines
7.6 KiB
Bash
Executable File
#! /bin/sh
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# updown script setting inbound marks on ESP traffic in the mangle chain
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#
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# Copyright (C) 2003-2004 Nigel Meteringham
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# Copyright (C) 2003-2004 Tuomo Soini
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# Copyright (C) 2002-2004 Michael Richardson
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# Copyright (C) 2005-2010 Andreas Steffen <andreas.steffen@strongswan.org>
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 2 of the License, or (at your
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# option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# for more details.
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# CAUTION: Installing a new version of strongSwan will install a new
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# copy of this script, wiping out any custom changes you make. If
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# you need changes, make a copy of this under another name, and customize
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# that, and use the (left/right)updown parameters in ipsec.conf to make
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# strongSwan use yours instead of this default one.
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# things that this script gets (from ipsec_pluto(8) man page)
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#
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# PLUTO_VERSION
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# indicates what version of this interface is being
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# used. This document describes version 1.1. This
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# is upwardly compatible with version 1.0.
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#
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# PLUTO_VERB
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# specifies the name of the operation to be performed
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# (prepare-host, prepare-client, up-host, up-client,
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# down-host, or down-client). If the address family
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# for security gateway to security gateway communica-
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# tions is IPv6, then a suffix of -v6 is added to the
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# verb.
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#
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# PLUTO_CONNECTION
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# is the name of the connection for which we are
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# routing.
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#
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# PLUTO_NEXT_HOP
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# is the next hop to which packets bound for the peer
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# must be sent.
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#
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# PLUTO_INTERFACE
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# is the name of the ipsec interface to be used.
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#
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# PLUTO_REQID
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# is the requid of the ESP policy
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#
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# PLUTO_ME
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# is the IP address of our host.
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#
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# PLUTO_MY_ID
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# is the ID of our host.
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#
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# PLUTO_MY_CLIENT
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# is the IP address / count of our client subnet. If
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# the client is just the host, this will be the
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# host's own IP address / max (where max is 32 for
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# IPv4 and 128 for IPv6).
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#
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# PLUTO_MY_CLIENT_NET
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# is the IP address of our client net. If the client
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# is just the host, this will be the host's own IP
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# address.
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#
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# PLUTO_MY_CLIENT_MASK
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# is the mask for our client net. If the client is
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# just the host, this will be 255.255.255.255.
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#
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# PLUTO_MY_SOURCEIP
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# if non-empty, then the source address for the route will be
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# set to this IP address.
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#
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# PLUTO_MY_PROTOCOL
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# is the IP protocol that will be transported.
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#
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# PLUTO_MY_PORT
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# is the UDP/TCP port to which the IPsec SA is
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# restricted on our side.
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#
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# PLUTO_PEER
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# is the IP address of our peer.
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#
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# PLUTO_PEER_ID
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# is the ID of our peer.
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#
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# PLUTO_PEER_CA
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# is the CA which issued the cert of our peer.
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#
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# PLUTO_PEER_CLIENT
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# is the IP address / count of the peer's client sub-
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# net. If the client is just the peer, this will be
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# the peer's own IP address / max (where max is 32
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# for IPv4 and 128 for IPv6).
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#
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# PLUTO_PEER_CLIENT_NET
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# is the IP address of the peer's client net. If the
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# client is just the peer, this will be the peer's
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# own IP address.
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#
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# PLUTO_PEER_CLIENT_MASK
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# is the mask for the peer's client net. If the
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# client is just the peer, this will be
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# 255.255.255.255.
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#
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# PLUTO_PEER_PROTOCOL
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# is the IP protocol that will be transported.
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#
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# PLUTO_PEER_PORT
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# is the UDP/TCP port to which the IPsec SA is
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# restricted on the peer side.
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#
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# PLUTO_XAUTH_ID
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# is an optional user ID employed by the XAUTH protocol
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#
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# PLUTO_MARK_IN
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# is an optional XFRM mark set on the inbound IPsec SA
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#
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# PLUTO_MARK_OUT
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# is an optional XFRM mark set on the outbound IPsec SA
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#
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# PLUTO_UDP_ENC
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# contains the remote UDP port in the case of ESP_IN_UDP
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# encapsulation
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#
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# define a minimum PATH environment in case it is not set
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PATH="/sbin:/bin:/usr/sbin:/usr/bin:/usr/sbin"
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export PATH
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# check parameter(s)
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case "$1:$*" in
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':') # no parameters
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;;
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iptables:iptables) # due to (left/right)firewall; for default script only
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;;
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custom:*) # custom parameters (see above CAUTION comment)
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;;
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*) echo "$0: unknown parameters \`$*'" >&2
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exit 2
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;;
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esac
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# define NETMAP
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SAME_NET=$PLUTO_PEER_CLIENT
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IN_NET=$PLUTO_MY_CLIENT
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OUT_NET="10.8.0.0/14"
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# define internal interface
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INT_INTERFACE="eth1"
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# is there an inbound mark to be set?
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if [ -n "$PLUTO_MARK_IN" ]
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then
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if [ -n "$PLUTO_UDP_ENC" ]
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then
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SET_MARK_IN="-p udp --sport $PLUTO_UDP_ENC"
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else
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SET_MARK_IN="-p esp"
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fi
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SET_MARK_IN="$SET_MARK_IN -s $PLUTO_PEER -j MARK --set-mark $PLUTO_MARK_IN"
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fi
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# is there an outbound mark to be set?
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if [ -n "$PLUTO_MARK_OUT" ]
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then
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SET_MARK_OUT="-i $INT_INTERFACE -s $SAME_NET -d $OUT_NET -j MARK --set-mark $PLUTO_MARK_OUT"
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fi
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# resolve octal escape sequences
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PLUTO_MY_ID=`printf "$PLUTO_MY_ID"`
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PLUTO_PEER_ID=`printf "$PLUTO_PEER_ID"`
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# the big choice
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case "$PLUTO_VERB:$1" in
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up-client:)
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# connection to my client subnet coming up
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# If you are doing a custom version, firewall commands go here.
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if [ -n "$PLUTO_MARK_IN" ]
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then
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iptables -t mangle -A PREROUTING $SET_MARK_IN
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iptables -t nat -A PREROUTING -i $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_IN \
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-d $IN_NET -j NETMAP --to $SAME_NET
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iptables -I FORWARD 1 -i $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_IN -j ACCEPT
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iptables -t nat -A POSTROUTING -o $INT_INTERFACE -m mark --mark $PLUTO_MARK_IN \
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-s $SAME_NET -j NETMAP --to $OUT_NET
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fi
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if [ -n "$PLUTO_MARK_OUT" ]
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then
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iptables -t mangle -A PREROUTING $SET_MARK_OUT
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iptables -t nat -A PREROUTING -i $INT_INTERFACE -m mark --mark $PLUTO_MARK_OUT \
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-d $OUT_NET -j NETMAP --to $SAME_NET
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iptables -I FORWARD 1 -o $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_OUT -j ACCEPT
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iptables -t nat -A POSTROUTING -o $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_OUT \
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-s $SAME_NET -j NETMAP --to $IN_NET
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fi
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;;
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down-client:)
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# connection to my client subnet going down
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# If you are doing a custom version, firewall commands go here.
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if [ -n "$PLUTO_MARK_IN" ]
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then
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iptables -t mangle -D PREROUTING $SET_MARK_IN
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iptables -t nat -D PREROUTING -i $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_IN \
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-d $IN_NET -j NETMAP --to $SAME_NET
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iptables -D FORWARD -i $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_IN -j ACCEPT
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iptables -t nat -D POSTROUTING -o eth1 -m mark --mark $PLUTO_MARK_IN \
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-s $SAME_NET -j NETMAP --to $OUT_NET
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fi
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if [ -n "$PLUTO_MARK_OUT" ]
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then
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iptables -t mangle -D PREROUTING $SET_MARK_OUT
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iptables -D FORWARD -o $PLUTO_INTERFACE -m mark --mark $PLUTO_MARK_OUT -j ACCEPT
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fi
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;;
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*) echo "$0: unknown verb \`$PLUTO_VERB' or parameter \`$1'" >&2
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exit 1
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;;
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esac
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