testing: Add a test scenario for make-before-break reauth using a virtual IP

testing/tests/ikev2/reauth-mbb-virtual-ip/description.txt

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+This scenario tests <b>make-before-break reauthentication</b> using overlapping
+IKE_SAs by setting the <i>make_before_break</i> strongswan.conf option for
+clients using an assigned virtual IP. The initiator <b>carol</b> reauthenticates
+the IKE_SA with host <b>moon</b> using <b>ikelifetime=10s</b>, but does not
+close the old IKE_SA before the replacement CHILD_SA using the same virtual IP
+is in place. A constant ping from <b>carol</b> to client <b>alice</b>
+hiding in the subnet behind <b>moon</b> tests if the CHILD_SA works during the
+whole procedure.

testing/tests/ikev2/reauth-mbb-virtual-ip/evaltest.dat

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+moon:: ipsec status 2> /dev/null::rw\[1]: ESTABLISHED.*moon.strongswan.org.*carol@strongswan.org::YES
+carol::ipsec status 2> /dev/null::home\[1]: ESTABLISHED.*carol@strongswan.org.*moon.strongswan.org::YES
+carol::ping -c 8 PH_IP_ALICE::64 bytes from PH_IP_ALICE::YES
+moon:: ipsec status 2> /dev/null::rw\[2]: ESTABLISHED.*moon.strongswan.org.*carol@strongswan.org::YES
+carol::ipsec status 2> /dev/null::home\[2]: ESTABLISHED.*carol@strongswan.org.*moon.strongswan.org::YES
+moon::tcpdump::IP carol.strongswan.org > moon.strongswan.org: ESP::YES
+moon::tcpdump::IP moon.strongswan.org > carol.strongswan.org: ESP::YES

testing/tests/ikev2/reauth-mbb-virtual-ip/hosts/carol/etc/ipsec.conf

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+
+conn %default
+	keylife=20m
+	ikelifetime=10s
+	rekeymargin=5s
+	rekeyfuzz=0%
+	keyingtries=1
+
+conn home
+	left=PH_IP_CAROL
+	leftcert=carolCert.pem
+	leftid=carol@strongswan.org
+	leftsourceip=%config
+	leftfirewall=yes
+	right=PH_IP_MOON
+	rightid=@moon.strongswan.org
+	rightsubnet=10.1.0.0/16
+	keyexchange=ikev2
+	auto=add

testing/tests/ikev2/reauth-mbb-virtual-ip/hosts/carol/etc/strongswan.conf

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+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+  load = aes des sha1 sha2 md5 pem pkcs1 gmp random nonce x509 curl revocation hmac xcbc stroke kernel-netlink socket-default updown
+
+  make_before_break = yes
+}

testing/tests/ikev2/reauth-mbb-virtual-ip/hosts/moon/etc/ipsec.conf

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+
+conn %default
+	ikelifetime=30m
+	keylife=20m
+	rekeymargin=0s
+	keyingtries=1
+
+conn rw
+	left=PH_IP_MOON
+	leftcert=moonCert.pem
+	leftid=@moon.strongswan.org
+	leftsubnet=10.1.0.0/16
+	leftfirewall=yes
+	right=%any
+	rightsourceip=10.3.0.0/24
+	keyexchange=ikev2
+	auto=add

testing/tests/ikev2/reauth-mbb-virtual-ip/hosts/moon/etc/strongswan.conf

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+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+  load = aes des sha1 sha2 md5 pem pkcs1 gmp random nonce x509 curl revocation hmac xcbc stroke kernel-netlink socket-default updown
+}

testing/tests/ikev2/reauth-mbb-virtual-ip/posttest.dat

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+moon::ipsec stop
+carol::ipsec stop
+moon::iptables-restore < /etc/iptables.flush
+carol::iptables-restore < /etc/iptables.flush

testing/tests/ikev2/reauth-mbb-virtual-ip/pretest.dat

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+moon::iptables-restore < /etc/iptables.rules
+carol::iptables-restore < /etc/iptables.rules
+moon::ipsec start
+carol::ipsec start
+carol::sleep 1
+carol::ipsec up home

testing/tests/ikev2/reauth-mbb-virtual-ip/test.conf

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+#!/bin/bash
+#
+# This configuration file provides information on the
+# guest instances used for this test
+
+# All guest instances that are required for this test
+#
+VIRTHOSTS="alice moon carol winnetou"
+
+# Corresponding block diagram
+#
+DIAGRAM="a-m-c-w.png"
+
+# Guest instances on which tcpdump is to be started
+#
+TCPDUMPHOSTS="moon"
+
+# Guest instances on which IPsec is started
+# Used for IPsec logging purposes
+#
+IPSECHOSTS="moon carol"