added new scenarios

testing/tests/ikev2/double-nat-net/description.txt

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+The roadwarrior <b>alice</b> sitting behind the NAT router <b>moon</b> sets up a
+tunnel to the subnet hiding behind the NAT router <b>sun</b>. All IKE and ESP traffic
+directed to the router <b>sun</b> is forwarded to the VPN gateway <b>bob</b>
+using destination NAT.  UDP encapsulation is used to traverse the NAT routers.
+<b>leftfirewall=yes</b> automatically inserts iptables-based firewall rules that
+let pass the tunneled traffic. In order to test the double NAT-ed IPsec
+tunnel <b>alice</b> pings the inner IP address of the router <b>sun</b>.

testing/tests/ikev2/double-nat-net/evaltest.dat

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+alice::ipsec statusall::nat-t.*INSTALLED::YES
+bob::ipsec statusall::nat-t.*INSTALLED::YES
+alice::ping -c 1 PH_IP_SUN1::64 bytes from PH_IP_SUN1: icmp_seq=1::YES
+moon::tcpdump::IP moon.strongswan.org.* > sun.strongswan.org.ipsec-nat-t: UDP::YES
+moon::tcpdump::IP sun.strongswan.org.ipsec-nat-t > moon.strongswan.org.*: UDP::YES

testing/tests/ikev2/double-nat-net/hosts/alice/etc/ipsec.conf

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+	strictcrlpolicy=no
+	plutostart=no
+
+conn %default
+	ikelifetime=60m
+	keylife=20m
+	rekeymargin=3m
+	keyingtries=1
+	keyexchange=ikev2
+		
+conn nat-t
+	left=%defaultroute
+	leftcert=aliceCert.pem
+	[email protected]
+	leftfirewall=yes
+	right=PH_IP_SUN
+	[email protected]
+	rightsubnet=10.2.0.0/16
+	auto=add

testing/tests/ikev2/double-nat-net/hosts/bob/etc/ipsec.conf

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+	strictcrlpolicy=no
+	plutostart=no
+
+conn %default
+	ikelifetime=60m
+	keylife=20m
+	rekeymargin=3m
+	keyingtries=1
+	keyexchange=ikev2
+
+conn nat-t
+	left=%defaultroute
+	leftsubnet=10.2.0.0/16
+	leftcert=bobCert.pem
+	[email protected]
+	leftfirewall=yes
+	right=%any
+	rightsubnet=10.1.0.0/16
+	auto=add

testing/tests/ikev2/double-nat-net/posttest.dat

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+alice::iptables -v -n -L
+bob::iptables -v -n -L
+bob::ipsec stop
+alice::ipsec stop
+alice::/etc/init.d/iptables stop 2> /dev/null
+bob::/etc/init.d/iptables stop 2> /dev/null
+moon::iptables -t nat -F
+sun::iptables -t nat -F
+sun::ip route del 10.1.0.0/16 via PH_IP_BOB

testing/tests/ikev2/double-nat-net/pretest.dat

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+alice::/etc/init.d/iptables start 2> /dev/null
+bob::/etc/init.d/iptables start 2> /dev/null
+bob::echo 1 > /proc/sys/net/ipv4/ip_forward
+moon::echo 1 > /proc/sys/net/ipv4/ip_forward
+sun::echo 1 > /proc/sys/net/ipv4/ip_forward
+moon::iptables -t nat -A POSTROUTING -o eth0 -s 10.1.0.0/16 -p udp -j SNAT --to-source PH_IP_MOON:1024-1100
+moon::iptables -t nat -A POSTROUTING -o eth0 -s 10.1.0.0/16 -p tcp -j SNAT --to-source PH_IP_MOON:2000-2100
+sun::iptables -t nat -A POSTROUTING -o eth0 -s 10.2.0.0/16 -p tcp -j SNAT --to-source PH_IP_SUN:2000-2100
+sun::iptables -t nat -A PREROUTING -i eth0 -s PH_IP_MOON -p udp -j DNAT --to-destination PH_IP_BOB
+sun::ip route add 10.1.0.0/16 via PH_IP_BOB
+alice::ipsec start
+bob::ipsec start
+alice::sleep 2
+alice::ipsec up nat-t
+alice::sleep 1

testing/tests/ikev2/double-nat-net/test.conf

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+#!/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 bob"