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testing: Add ikev2/per-cpu-sas-encap scenario

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Basically the same as the one without UDP encapsulation, but here the
outbound SAs use random source ports.
This commit is contained in:
Tobias Brunner 2021-06-15 11:13:35 +02:00
parent d83fbe82e4
commit 3b2f8cf282
9 changed files with 237 additions and 0 deletions
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13
testing/tests/ikev2/per-cpu-sas-encap/description.txt Executable file
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The two gateways <b>moon</b> and <b>sun</b> are configured to use per-CPU
CHILD_SAs in order to improve performance. Using the <b>taskset</b> utility
pings are sent from different CPUs triggering the creation of additional SA
via the installed trap policy. The first ping triggers the creation of a
fallback SA that's used while per-CPU SAs are created for later packets. Note
that responses sent from the peer may create per-CPU SAs that are not triggered
by local acquires.
<p>
UDP encapsulation is forced and the special value <b>encap</b> is used when
enabling per-CPU SAs to force random source ports for the outbound SAs.
<p>
The updown script automatically inserts iptables-based firewall rules
that let pass the tunneled traffic.

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testing/tests/ikev2/per-cpu-sas-encap/evaltest.dat Executable file
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moon::swanctl --list-pols --raw 2> /dev/null::net-net.*mode=TUNNEL local-ts=\[10.1.0.0/16] remote-ts=\[10.2.0.0/16]::YES
moon::cat /var/log/daemon.log::creating acquire job for policy 10.1.0.1/32\[icmp/8] === 10.2.0.10/32\[icmp/8]::YES
moon::cat /var/log/daemon.log::creating acquire job for policy 10.1.0.1/32\[icmp/8] === 10.2.0.10/32\[icmp/8].*cpu::NO
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=TUNNEL.*ESP.*per-cpu-sas=yes.*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=TUNNEL.*ESP.*per-cpu-sas=yes.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[10.2.0.0/16] remote-ts=\[10.1.0.0/16]::YES
# this triggers a per-CPU SA for CPU 1 and creates one for CPU 3 as responder,
# the packet is sent and received via fallback SA
moon::taskset -c 1 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::cat /var/log/daemon.log::creating acquire job for policy 10.1.0.1/32\[icmp/8] === 10.2.0.10/32\[icmp/8].*cpu {1}::YES
moon::swanctl --list-sas --child-id 2 --raw 2> /dev/null::child-sas.*net-net.*packets-in=1.*packets-out=1::YES
moon::swanctl --list-sas --child-id 3 --raw 2> /dev/null::child-sas.*net-net.*cpu=1.*packets-in=0.*packets-out=0::YES
moon::swanctl --list-sas --child-id 4 --raw 2> /dev/null::child-sas.*net-net.*cpu=3.*packets-in=0.*packets-out=0::YES
# this takes the per-CPU SA created above, the response most likely the one
# created as responder
moon::taskset -c 1 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::swanctl --list-sas --child-id 2 --raw 2> /dev/null::child-sas.*net-net.*packets-in=1.*packets-out=1::YES
moon::swanctl --list-sas --child-id 3 --raw 2> /dev/null::child-sas.*net-net.*cpu=1.*packets-in=0.*packets-out=1::YES
moon::swanctl --list-sas --child-id 4 --raw 2> /dev/null::child-sas.*net-net.*cpu=3.*packets-in=1.*packets-out=0::YES
# trigger another SA for CPU 0, request is sent via fallback SA, received via sub SA
moon::taskset -c 0 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::cat /var/log/daemon.log::creating acquire job for policy 10.1.0.1/32\[icmp/8] === 10.2.0.10/32\[icmp/8].*cpu {0}::YES
moon::swanctl --list-sas --child-id 2 --raw 2> /dev/null::child-sas.*net-net.*packets-in=1.*packets-out=2::YES
moon::swanctl --list-sas --child-id 3 --raw 2> /dev/null::child-sas.*net-net.*cpu=1.*packets-in=0.*packets-out=1::YES
moon::swanctl --list-sas --child-id 4 --raw 2> /dev/null::child-sas.*net-net.*cpu=3.*packets-in=2.*packets-out=0::YES
moon::swanctl --list-sas --child-id 5 --raw 2> /dev/null::child-sas.*net-net.*cpu=0.*packets-in=0.*packets-out=0::YES
# create a final SA for CPU 2, request is sent via fallback SA, response via one of the
# sub SAs (depends on the CPU assignment on the responder as it has to assign multiple
# SAs to the same CPU, so it could be either the one with unique ID 5, as it might
# be the newer one for that CPU, or it could be the original SA with unique ID 4)
moon::taskset -c 2 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::cat /var/log/daemon.log::creating acquire job for policy 10.1.0.1/32\[icmp/8] === 10.2.0.10/32\[icmp/8].*cpu {2}::YES
moon::swanctl --list-sas --child-id 2 --raw 2> /dev/null::child-sas.*net-net.*packets-in=1.*packets-out=3::YES
moon::swanctl --list-sas --child-id 3 --raw 2> /dev/null::child-sas.*net-net.*cpu=1.*packets-in=0.*packets-out=1::YES
moon::swanctl --list-sas --child-id 4 --raw 2> /dev/null::child-sas.*net-net.*cpu=3.*packets-in=2.*packets-out=0::YES
moon::swanctl --list-sas --child-id 5 --raw 2> /dev/null::child-sas.*net-net.*cpu=0.*packets-in=1.*packets-out=0::YES
moon::swanctl --list-sas --child-id 6 --raw 2> /dev/null::child-sas.*net-net.*cpu=2.*packets-in=0.*packets-out=0::YES
# all these pings must be sent via their respective SAs, never the fallback SA
moon::taskset -c 0 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::taskset -c 1 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::taskset -c 2 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::taskset -c 3 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::swanctl --list-sas --child-id 2 --raw 2> /dev/null::child-sas.*net-net.*packets-in=1.*packets-out=3::YES
moon::swanctl --list-sas --child-id 3 --raw 2> /dev/null::child-sas.*net-net.*cpu=1.*packets-in=0.*packets-out=2::YES
moon::swanctl --list-sas --child-id 4 --raw 2> /dev/null::child-sas.*net-net.*cpu=3.*packets-in=2.*packets-out=1::YES
moon::swanctl --list-sas --child-id 5 --raw 2> /dev/null::child-sas.*net-net.*cpu=0.*packets-in=1.*packets-out=1::YES
moon::swanctl --list-sas --child-id 6 --raw 2> /dev/null::child-sas.*net-net.*cpu=2.*packets-in=4.*packets-out=1::YES
# rekey an SA as initiator
moon::swanctl --rekey --child-id 5
moon::sleep .5
moon::taskset -c 0 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::swanctl --list-sas --child-id 7 --raw 2> /dev/null::child-sas.*net-net.*cpu=0.*packets-in=1.*packets-out=1::YES
# rekey an SA as responder
sun::swanctl --rekey --child-id 6
moon::sleep .5
moon::taskset -c 2 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::swanctl --list-sas --child-id 8 --raw 2> /dev/null::child-sas.*net-net.*cpu=2.*packets-in=1.*packets-out=1::YES
# rekey the fallback SA
moon::swanctl --rekey --child-id 2
moon::sleep .5
moon::swanctl --list-sas --child-id 9 --raw 2> /dev/null::child-sas.*net-net.*packets-in=0.*packets-out=0::YES
# all these pings must be sent via their respective SAs, never the fallback SA and not
# the old ones that remain to process delayed inbound packets
moon::taskset -c 0 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::taskset -c 1 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::taskset -c 2 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::taskset -c 3 ping -c 1 -I PH_IP_MOON1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::swanctl --list-sas --child-id 2 --raw 2> /dev/null::child-sas.*net-net.*state=DELETED.*packets-in=1.*packets-out=3::YES
moon::swanctl --list-sas --child-id 3 --raw 2> /dev/null::child-sas.*net-net.*state=INSTALLED.*cpu=1.*packets-in=0.*packets-out=3::YES
moon::swanctl --list-sas --child-id 4 --raw 2> /dev/null::child-sas.*net-net.*state=INSTALLED.*cpu=3.*packets-in=2.*packets-out=2::YES
moon::swanctl --list-sas --child-id 5 --raw 2> /dev/null::child-sas.*net-net.*state=DELETED.*cpu=0.*packets-in=1.*packets-out=1::YES
moon::swanctl --list-sas --child-id 6 --raw 2> /dev/null::child-sas.*net-net.*state=DELETED.*cpu=2.*packets-in=4.*packets-out=1::YES
moon::swanctl --list-sas --child-id 7 --raw 2> /dev/null::child-sas.*net-net.*state=INSTALLED.*cpu=0.*packets-in=1.*packets-out=2::YES
moon::swanctl --list-sas --child-id 8 --raw 2> /dev/null::child-sas.*net-net.*state=INSTALLED.*cpu=2.*packets-in=5.*packets-out=2::YES
moon::swanctl --list-sas --child-id 9 --raw 2> /dev/null::child-sas.*net-net.*state=INSTALLED.*packets-in=0.*packets-out=0::YES
# also test forwarding (we don't know which SA this takes, but never the fallback SA)
alice::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
moon::swanctl --list-sas --child-id 2 --raw 2> /dev/null::child-sas.*net-net.*state=DELETED.*packets-in=1.*packets-out=3::YES
moon::swanctl --list-sas --child-id 9 --raw 2> /dev/null::child-sas.*net-net.*state=INSTALLED.*packets-in=0.*packets-out=0::YES
sun::tcpdump::IP moon.strongswan.org.* > sun.strongswan.org.ipsec-nat-t: UDP-encap: ESP::YES
sun::tcpdump::IP sun.strongswan.org.* > moon.strongswan.org.ipsec-nat-t: UDP-encap: ESP::YES

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testing/tests/ikev2/per-cpu-sas-encap/hosts/moon/etc/strongswan.conf Executable file
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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
syslog {
daemon {
knl = 2
}
}
}

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testing/tests/ikev2/per-cpu-sas-encap/hosts/moon/etc/swanctl/swanctl.conf Executable file
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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
per_cpu_sas = encap
start_action = trap
updown = /usr/local/libexec/ipsec/_updown iptables
hostaccess = yes
esp_proposals = aes128gcm128-x25519
}
}
version = 2
mobike = no
encap = yes
proposals = aes128-sha256-x25519
}
}

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testing/tests/ikev2/per-cpu-sas-encap/hosts/sun/etc/strongswan.conf Executable file
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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
syslog {
daemon {
knl = 2
}
}
}

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testing/tests/ikev2/per-cpu-sas-encap/hosts/sun/etc/swanctl/swanctl.conf Executable file
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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
per_cpu_sas = encap
start_action = trap
updown = /usr/local/libexec/ipsec/_updown iptables
hostaccess = yes
esp_proposals = aes128gcm128-x25519
}
}
version = 2
mobike = no
encap = yes
proposals = aes128-sha256-x25519
}
}

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testing/tests/ikev2/per-cpu-sas-encap/posttest.dat Executable file
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moon::swanctl --terminate --ike gw-gw 2> /dev/null
moon::systemctl stop strongswan
sun::systemctl stop strongswan
moon::iptables-restore < /etc/iptables.flush
sun::iptables-restore < /etc/iptables.flush

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testing/tests/ikev2/per-cpu-sas-encap/pretest.dat Executable file
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sun::iptables-restore < /etc/iptables.rules
moon::iptables-restore < /etc/iptables.rules
sun::systemctl start strongswan
moon::systemctl start strongswan
sun::expect-connection gw-gw
moon::expect-connection gw-gw
# allow UDP encap from any source to 4500
moon::iptables -A INPUT -i eth0 -p udp --dport 4500 -j ACCEPT
moon::iptables -A OUTPUT -o eth0 -p udp --dport 4500 -j ACCEPT
sun:: iptables -A INPUT -i eth0 -p udp --dport 4500 -j ACCEPT
sun:: iptables -A OUTPUT -o eth0 -p udp --dport 4500 -j ACCEPT
# triggering packet apparently goes via lo
moon::iptables -A OUTPUT -o lo -d 10.2.0.0/16 -j ACCEPT
# trigger the creation of the fallback SA, use -I so no UDP socket is used to
# determine the source address and trigger the acqurie (this packet is lost)
moon::ping -c 1 -W 1 -I PH_IP_MOON1 PH_IP_BOB

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testing/tests/ikev2/per-cpu-sas-encap/test.conf Executable file
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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