added force-udp-encaps scenario

testing/tests/ikev2/force-udp-encaps/description.txt

@@ -0,0 +1,6 @@
+The roadwarrior <b>alice</b> sitting behind the NAT router <b>moon</b> sets up a tunnel to
+gateway <b>sun</b>. Since the firewall on <b>sun</b> blocks the ESP protocol, enforced UDP
+encapsulation (<b>forceencaps=yes</b>) is used by <b>alice</b> to punch through this hurdle. 
+<b>leftfirewall=yes</b> automatically inserts iptables-based firewall rules that let pass
+the tunneled traffic. In order to test the tunnel, host <b>alice</b> pings the
+client <b>bob</b> behind the gateway <b>sun</b>.

testing/tests/ikev2/force-udp-encaps/evaltest.dat

@@ -0,0 +1,5 @@
+alice::ipsec statusall::nat-t.*INSTALLED::YES
+sun::ipsec statusall::nat-t.*INSTALLED::YES
+alice::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_seq=1::YES
+moon::tcpdump::IP alice.strongswan.org.* > sun.strongswan.org.ipsec-nat-t: UDP::YES
+moon::tcpdump::IP sun.strongswan.org.ipsec-nat-t > alice.strongswan.org.*: UDP::YES

testing/tests/ikev2/force-udp-encaps/hosts/alice/etc/ipsec.conf

@@ -0,0 +1,24 @@
+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+        crlcheckinterval=180
+	strictcrlpolicy=no
+	plutostart=no
+
+conn %default
+	ikelifetime=60m
+	keylife=20m
+	rekeymargin=3m
+	keyingtries=1
+	keyexchange=ikev2
+
+conn nat-t
+	left=%defaultroute
+	leftcert=aliceCert.pem
+	leftid=alice@strongswan.org
+	leftfirewall=yes
+	right=PH_IP_SUN
+	rightid=@sun.strongswan.org
+	rightsubnet=10.2.0.0/16
+	forceencaps=yes
+	auto=add

testing/tests/ikev2/force-udp-encaps/hosts/sun/etc/init.d/iptables

@@ -0,0 +1,76 @@
+#!/sbin/runscript
+# Copyright 1999-2004 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+opts="start stop reload"
+
+depend() {
+	before net
+	need logger
+}
+
+start() {
+	ebegin "Starting firewall"
+
+	# enable IP forwarding
+	echo 1 > /proc/sys/net/ipv4/ip_forward
+	
+	# default policy is DROP
+	/sbin/iptables -P INPUT DROP
+	/sbin/iptables -P OUTPUT DROP
+	/sbin/iptables -P FORWARD DROP
+
+	# allow IKE
+	iptables -A INPUT  -i eth0 -p udp --dport 500 -j ACCEPT
+	iptables -A OUTPUT -o eth0 -p udp --sport 500 -j ACCEPT
+
+        # allow NAT-T 
+	iptables -A INPUT  -i eth0 -p udp --dport 4500 -j ACCEPT
+	iptables -A OUTPUT -o eth0 -p udp --sport 4500 -j ACCEPT
+
+	# allow crl fetch from winnetou
+	iptables -A INPUT  -i eth0 -p tcp --sport 80 -s PH_IP_WINNETOU -j ACCEPT
+	iptables -A OUTPUT -o eth0 -p tcp --dport 80 -d PH_IP_WINNETOU -j ACCEPT
+
+	# allow ssh
+	iptables -A INPUT  -p tcp --dport 22 -j ACCEPT
+	iptables -A OUTPUT -p tcp --sport 22 -j ACCEPT
+
+	eend $?
+}
+
+stop() {
+	ebegin "Stopping firewall"
+		for a in `cat /proc/net/ip_tables_names`; do
+			/sbin/iptables -F -t $a
+			/sbin/iptables -X -t $a
+	
+			if [ $a == nat ]; then
+				/sbin/iptables -t nat -P PREROUTING ACCEPT
+				/sbin/iptables -t nat -P POSTROUTING ACCEPT
+				/sbin/iptables -t nat -P OUTPUT ACCEPT
+			elif [ $a == mangle ]; then
+				/sbin/iptables -t mangle -P PREROUTING ACCEPT
+				/sbin/iptables -t mangle -P INPUT ACCEPT
+				/sbin/iptables -t mangle -P FORWARD ACCEPT
+				/sbin/iptables -t mangle -P OUTPUT ACCEPT
+				/sbin/iptables -t mangle -P POSTROUTING ACCEPT
+			elif [ $a == filter ]; then
+				/sbin/iptables -t filter -P INPUT ACCEPT
+				/sbin/iptables -t filter -P FORWARD ACCEPT
+				/sbin/iptables -t filter -P OUTPUT ACCEPT
+			fi
+		done
+	eend $?
+}
+
+reload() {
+	ebegin "Flushing firewall"
+		for a in `cat /proc/net/ip_tables_names`; do
+			/sbin/iptables -F -t $a
+			/sbin/iptables -X -t $a
+		done;
+        eend $?
+	start
+}
+

testing/tests/ikev2/force-udp-encaps/hosts/sun/etc/ipsec.conf

@@ -0,0 +1,35 @@
+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+        crlcheckinterval=180
+	strictcrlpolicy=no
+	plutostart=no
+
+conn %default
+	ikelifetime=60m
+	keylife=20m
+	rekeymargin=3m
+	keyingtries=1
+	keyexchange=ikev2
+	left=PH_IP_SUN
+	leftcert=sunCert.pem
+	leftid=@sun.strongswan.org
+	leftfirewall=yes
+
+conn net-net
+	leftsubnet=10.2.0.0/16
+	right=PH_IP_MOON
+	rightsubnet=10.1.0.0/16
+	rightid=@moon.strongswan.org
+	auto=add
+
+conn host-host
+	right=PH_IP_MOON
+	rightid=@moon.strongswan.org
+	auto=add
+
+conn nat-t
+	leftsubnet=10.2.0.0/16
+	right=%any
+	rightsubnet=10.1.0.10/32
+	auto=add

testing/tests/ikev2/force-udp-encaps/posttest.dat

@@ -0,0 +1,6 @@
+alice::ipsec stop
+sun::ipsec stop
+alice::/etc/init.d/iptables stop 2> /dev/null
+sun::/etc/init.d/iptables stop 2> /dev/null
+sun::ip route del 10.1.0.0/16 via PH_IP_MOON
+winnetou::ip route del 10.1.0.0/16 via PH_IP_MOON

testing/tests/ikev2/force-udp-encaps/pretest.dat

@@ -0,0 +1,11 @@
+alice::/etc/init.d/iptables start 2> /dev/null
+sun::/etc/init.d/iptables start 2> /dev/null
+sun::ip route add 10.1.0.0/16 via PH_IP_MOON
+winnetou::ip route add 10.1.0.0/16 via PH_IP_MOON
+moon::echo 1 > /proc/sys/net/ipv4/ip_forward
+alice::ipsec start
+sun::ipsec start
+alice::sleep 4
+alice::ipsec up nat-t
+alice::sleep 1 
+

testing/tests/ikev2/force-udp-encaps/test.conf

@@ -0,0 +1,21 @@
+#!/bin/bash
+#
+# This configuration file provides information on the
+# UML instances used for this test
+
+# All UML instances that are required for this test
+#
+UMLHOSTS="alice moon winnetou sun bob"
+
+# Corresponding block diagram
+#
+DIAGRAM="a-m-w-s-b.png"
+
+# UML instances on which tcpdump is to be started
+#
+TCPDUMPHOSTS="moon"
+
+# UML instances on which IPsec is started
+# Used for IPsec logging purposes
+#
+IPSECHOSTS="alice sun"