testing: Add ikev2/net2net-iptfs scenario

testing/tests/ikev2/net2net-iptfs/description.txt

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+A connection between the subnets behind the gateways <b>moon</b> and <b>sun</b> is set up
+enabling IP-TFS (RFC 9347) to aggregate small packets into a single ESP packets and
+fragment large packets across multiple ESP packets.
+The authentication is based on <b>X.509 certificates</b>.
+<p/>
+Upon the successful establishment of the IPsec tunnel, the updown script automatically
+inserts iptables-based firewall rules that let pass the tunneled traffic.
+In order to test both tunnel and firewall, client <b>alice</b> behind gateway <b>moon</b>
+sends several pings to client <b>bob</b> located behind gateway <b>sun</b>.

testing/tests/ikev2/net2net-iptfs/evaltest.dat

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+moon::swanctl --list-sas --raw 2> /dev/null::gw-gw.*version=2 state=ESTABLISHED local-host=192.168.0.1 local-port=4500 local-id=moon.strongswan.org remote-host=192.168.0.2 remote-port=4500 remote-id=sun.strongswan.org initiator=yes.*encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128 prf-alg=PRF_HMAC_SHA2_256 dh-group=CURVE_25519.*child-sas.*net-net.*state=INSTALLED mode=IPTFS.*ESP.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[10.1.0.0/16] remote-ts=\[10.2.0.0/16]::YES
+sun:: swanctl --list-sas --raw 2> /dev/null::gw-gw.*version=2 state=ESTABLISHED local-host=192.168.0.2 local-port=4500 local-id=sun.strongswan.org remote-host=192.168.0.1 remote-port=4500 remote-id=moon.strongswan.org.*encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128 prf-alg=PRF_HMAC_SHA2_256 dh-group=CURVE_25519.*child-sas.*net-net.*state=INSTALLED mode=IPTFS.*ESP.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[10.2.0.0/16] remote-ts=\[10.1.0.0/16]::YES
+alice::ping -c 4 -i 0.1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=.::4
+sun::tcpdump::IP moon.strongswan.org > sun.strongswan.org: ESP::1
+sun::tcpdump::IP sun.strongswan.org > moon.strongswan.org: ESP::1

testing/tests/ikev2/net2net-iptfs/hosts/moon/etc/strongswan.conf

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+# /etc/strongswan.conf - strongSwan configuration file
+
+swanctl {
+  load = pem pkcs1 revocation constraints pubkey openssl random
+}
+
+charon-systemd {
+  load = random nonce openssl pem pkcs1 revocation curl kernel-netlink socket-default updown vici
+  iptfs {
+    # set to 0.5 seconds for test purposes
+    init_delay = 500000
+  }
+}

testing/tests/ikev2/net2net-iptfs/hosts/moon/etc/swanctl/swanctl.conf

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+connections {
+
+   gw-gw {
+      local_addrs  = 192.168.0.1
+      remote_addrs = 192.168.0.2
+
+      local {
+         auth = pubkey
+         certs = moonCert.pem
+         id = moon.strongswan.org
+      }
+      remote {
+         auth = pubkey
+         id = sun.strongswan.org
+      }
+      children {
+         net-net {
+            local_ts  = 10.1.0.0/16
+            remote_ts = 10.2.0.0/16
+
+            mode = iptfs
+
+            updown = /usr/local/libexec/ipsec/_updown iptables
+            hostaccess = yes
+            esp_proposals = aes128gcm128-x25519
+         }
+      }
+      version = 2
+      proposals = aes128-sha256-x25519
+   }
+}

testing/tests/ikev2/net2net-iptfs/hosts/sun/etc/strongswan.conf

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+# /etc/strongswan.conf - strongSwan configuration file
+
+swanctl {
+  load = pem pkcs1 revocation constraints pubkey openssl random
+}
+
+charon-systemd {
+  load = random nonce openssl pem pkcs1 revocation curl kernel-netlink socket-default updown vici
+}

testing/tests/ikev2/net2net-iptfs/hosts/sun/etc/swanctl/swanctl.conf

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+connections {
+
+   gw-gw {
+      local_addrs  = 192.168.0.2
+      remote_addrs = 192.168.0.1
+
+      local {
+         auth = pubkey
+         certs = sunCert.pem
+         id = sun.strongswan.org
+      }
+      remote {
+         auth = pubkey
+         id = moon.strongswan.org
+      }
+      children {
+         net-net {
+            local_ts  = 10.2.0.0/16
+            remote_ts = 10.1.0.0/16
+
+            mode = iptfs
+
+            updown = /usr/local/libexec/ipsec/_updown iptables
+             esp_proposals = aes128gcm128-x25519
+         }
+      }
+      version = 2
+      proposals = aes128-sha256-x25519
+   }
+}

testing/tests/ikev2/net2net-iptfs/posttest.dat

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+moon::systemctl stop strongswan
+sun::systemctl stop strongswan
+moon::iptables-restore < /etc/iptables.flush
+sun::iptables-restore < /etc/iptables.flush

testing/tests/ikev2/net2net-iptfs/pretest.dat

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+moon::iptables-restore < /etc/iptables.rules
+sun::iptables-restore < /etc/iptables.rules
+moon::systemctl start strongswan
+sun::systemctl start strongswan
+moon::expect-connection gw-gw
+sun::expect-connection gw-gw
+moon::swanctl --initiate --child net-net 2> /dev/null

testing/tests/ikev2/net2net-iptfs/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 winnetou sun bob"
+
+# Corresponding block diagram
+#
+DIAGRAM="a-m-w-s-b.png"
+
+# Guest instances on which tcpdump is to be started
+#
+TCPDUMPHOSTS="sun"
+
+# Guest instances on which IPsec is started
+# Used for IPsec logging purposes
+#
+IPSECHOSTS="moon sun"
+
+# charon controlled by swanctl
+#
+SWANCTL=1