diff options
author | Florian Westphal <fw@strlen.de> | 2018-11-07 23:00:31 +0100 |
---|---|---|
committer | Steffen Klassert <steffen.klassert@secunet.com> | 2018-11-09 11:57:08 +0100 |
commit | b69d540da7db84e836cea77fbd56a518aafa1f2f (patch) | |
tree | fcaa3d4559843f6c7e7773038faa48abc6a4bf81 /tools/testing/selftests/net | |
parent | 29e12207174a58ac8cab4914d0a7ce5e6c872646 (diff) |
selftests: add xfrm policy test script
add a script that adds a ipsec tunnel between two network
namespaces plus following policies:
.0/24 -> ipsec tunnel
.240/28 -> bypass
.253/32 -> ipsec tunnel
Then check that .254 bypasses tunnel (match /28 exception),
and .2 (match /24) and .253 (match direct policy) pass through the
tunnel.
Abuses iptables to check if ping did resolve an ipsec policy or not.
Also adds a bunch of 'block' rules that are not supposed to match.
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'tools/testing/selftests/net')
-rw-r--r-- | tools/testing/selftests/net/Makefile | 3 | ||||
-rwxr-xr-x | tools/testing/selftests/net/xfrm_policy.sh | 276 |
2 files changed, 278 insertions, 1 deletions
diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index eec359895feb..2ab3e3437a92 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -4,7 +4,8 @@ CFLAGS = -Wall -Wl,--no-as-needed -O2 -g CFLAGS += -I../../../../usr/include/ -TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh rtnetlink.sh +TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh \ + rtnetlink.sh xfrm_policy.sh TEST_PROGS += fib_tests.sh fib-onlink-tests.sh pmtu.sh udpgso.sh ip_defrag.sh TEST_PROGS += udpgso_bench.sh fib_rule_tests.sh msg_zerocopy.sh psock_snd.sh TEST_PROGS += udpgro_bench.sh udpgro.sh diff --git a/tools/testing/selftests/net/xfrm_policy.sh b/tools/testing/selftests/net/xfrm_policy.sh new file mode 100755 index 000000000000..6ca63a6e50e9 --- /dev/null +++ b/tools/testing/selftests/net/xfrm_policy.sh @@ -0,0 +1,276 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Check xfrm policy resolution. Topology: +# +# 1.2 1.1 3.1 3.10 2.1 2.2 +# eth1 eth1 veth0 veth0 eth1 eth1 +# ns1 ---- ns3 ----- ns4 ---- ns2 +# +# ns3 and ns4 are connected via ipsec tunnel. +# pings from ns1 to ns2 (and vice versa) are supposed to work like this: +# ns1: ping 10.0.2.2: passes via ipsec tunnel. +# ns2: ping 10.0.1.2: passes via ipsec tunnel. + +# ns1: ping 10.0.1.253: passes via ipsec tunnel (direct policy) +# ns2: ping 10.0.2.253: passes via ipsec tunnel (direct policy) +# +# ns1: ping 10.0.2.254: does NOT pass via ipsec tunnel (exception) +# ns2: ping 10.0.1.254: does NOT pass via ipsec tunnel (exception) + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +ret=0 + +KEY_SHA=0xdeadbeef1234567890abcdefabcdefabcdefabcd +KEY_AES=0x0123456789abcdef0123456789012345 +SPI1=0x1 +SPI2=0x2 + +do_esp() { + local ns=$1 + local me=$2 + local remote=$3 + local lnet=$4 + local rnet=$5 + local spi_out=$6 + local spi_in=$7 + + ip -net $ns xfrm state add src $remote dst $me proto esp spi $spi_in enc aes $KEY_AES auth sha1 $KEY_SHA mode tunnel sel src $rnet dst $lnet + ip -net $ns xfrm state add src $me dst $remote proto esp spi $spi_out enc aes $KEY_AES auth sha1 $KEY_SHA mode tunnel sel src $lnet dst $rnet + + # to encrypt packets as they go out (includes forwarded packets that need encapsulation) + ip -net $ns xfrm policy add src $lnet dst $rnet dir out tmpl src $me dst $remote proto esp mode tunnel priority 100 action allow + # to fwd decrypted packets after esp processing: + ip -net $ns xfrm policy add src $rnet dst $lnet dir fwd tmpl src $remote dst $me proto esp mode tunnel priority 100 action allow +} + +do_exception() { + local ns=$1 + local me=$2 + local remote=$3 + local encryptip=$4 + local plain=$5 + + # network $plain passes without tunnel + ip -net $ns xfrm policy add dst $plain dir out priority 10 action allow + + # direct policy for $encryptip, use tunnel, higher prio takes precedence + ip -net $ns xfrm policy add dst $encryptip dir out tmpl src $me dst $remote proto esp mode tunnel priority 1 action allow +} + +# policies that are not supposed to match any packets generated in this test. +do_dummies4() { + local ns=$1 + + for i in $(seq 10 16);do + # dummy policy with wildcard src/dst. + echo netns exec $ns ip xfrm policy add src 0.0.0.0/0 dst 10.$i.99.0/30 dir out action block + echo netns exec $ns ip xfrm policy add src 10.$i.99.0/30 dst 0.0.0.0/0 dir out action block + for j in $(seq 32 64);do + echo netns exec $ns ip xfrm policy add src 10.$i.1.0/30 dst 10.$i.$j.0/30 dir out action block + # silly, as it encompasses the one above too, but its allowed: + echo netns exec $ns ip xfrm policy add src 10.$i.1.0/29 dst 10.$i.$j.0/29 dir out action block + # and yet again, even more broad one. + echo netns exec $ns ip xfrm policy add src 10.$i.1.0/24 dst 10.$i.$j.0/24 dir out action block + echo netns exec $ns ip xfrm policy add src 10.$i.$j.0/24 dst 10.$i.1.0/24 dir fwd action block + done + done | ip -batch /dev/stdin +} + +do_dummies6() { + local ns=$1 + + for i in $(seq 10 16);do + for j in $(seq 32 64);do + echo netns exec $ns ip xfrm policy add src dead:$i::/64 dst dead:$i:$j::/64 dir out action block + echo netns exec $ns ip xfrm policy add src dead:$i:$j::/64 dst dead:$i::/24 dir fwd action block + done + done | ip -batch /dev/stdin +} + +check_ipt_policy_count() +{ + ns=$1 + + ip netns exec $ns iptables-save -c |grep policy | ( read c rest + ip netns exec $ns iptables -Z + if [ x"$c" = x'[0:0]' ]; then + exit 0 + elif [ x"$c" = x ]; then + echo "ERROR: No counters" + ret=1 + exit 111 + else + exit 1 + fi + ) +} + +check_xfrm() { + # 0: iptables -m policy rule count == 0 + # 1: iptables -m policy rule count != 0 + rval=$1 + ip=$2 + ret=0 + + ip netns exec ns1 ping -q -c 1 10.0.2.$ip > /dev/null + + check_ipt_policy_count ns3 + if [ $? -ne $rval ] ; then + ret=1 + fi + check_ipt_policy_count ns4 + if [ $? -ne $rval ] ; then + ret=1 + fi + + ip netns exec ns2 ping -q -c 1 10.0.1.$ip > /dev/null + + check_ipt_policy_count ns3 + if [ $? -ne $rval ] ; then + ret=1 + fi + check_ipt_policy_count ns4 + if [ $? -ne $rval ] ; then + ret=1 + fi + + return $ret +} + +#check for needed privileges +if [ "$(id -u)" -ne 0 ];then + echo "SKIP: Need root privileges" + exit $ksft_skip +fi + +ip -Version 2>/dev/null >/dev/null +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without the ip tool" + exit $ksft_skip +fi + +# needed to check if policy lookup got valid ipsec result +iptables --version 2>/dev/null >/dev/null +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without iptables tool" + exit $ksft_skip +fi + +for i in 1 2 3 4; do + ip netns add ns$i + ip -net ns$i link set lo up +done + +DEV=veth0 +ip link add $DEV netns ns1 type veth peer name eth1 netns ns3 +ip link add $DEV netns ns2 type veth peer name eth1 netns ns4 + +ip link add $DEV netns ns3 type veth peer name veth0 netns ns4 + +DEV=veth0 +for i in 1 2; do + ip -net ns$i link set $DEV up + ip -net ns$i addr add 10.0.$i.2/24 dev $DEV + ip -net ns$i addr add dead:$i::2/64 dev $DEV + + ip -net ns$i addr add 10.0.$i.253 dev $DEV + ip -net ns$i addr add 10.0.$i.254 dev $DEV + ip -net ns$i addr add dead:$i::fd dev $DEV + ip -net ns$i addr add dead:$i::fe dev $DEV +done + +for i in 3 4; do +ip -net ns$i link set eth1 up +ip -net ns$i link set veth0 up +done + +ip -net ns1 route add default via 10.0.1.1 +ip -net ns2 route add default via 10.0.2.1 + +ip -net ns3 addr add 10.0.1.1/24 dev eth1 +ip -net ns3 addr add 10.0.3.1/24 dev veth0 +ip -net ns3 addr add 2001:1::1/64 dev eth1 +ip -net ns3 addr add 2001:3::1/64 dev veth0 + +ip -net ns3 route add default via 10.0.3.10 + +ip -net ns4 addr add 10.0.2.1/24 dev eth1 +ip -net ns4 addr add 10.0.3.10/24 dev veth0 +ip -net ns4 addr add 2001:2::1/64 dev eth1 +ip -net ns4 addr add 2001:3::10/64 dev veth0 +ip -net ns4 route add default via 10.0.3.1 + +for j in 4 6; do + for i in 3 4;do + ip netns exec ns$i sysctl net.ipv$j.conf.eth1.forwarding=1 > /dev/null + ip netns exec ns$i sysctl net.ipv$j.conf.veth0.forwarding=1 > /dev/null + done +done + +# abuse iptables rule counter to check if ping matches a policy +ip netns exec ns3 iptables -p icmp -A FORWARD -m policy --dir out --pol ipsec +ip netns exec ns4 iptables -p icmp -A FORWARD -m policy --dir out --pol ipsec +if [ $? -ne 0 ];then + echo "SKIP: Could not insert iptables rule" + for i in 1 2 3 4;do ip netns del ns$i;done + exit $ksft_skip +fi + +# localip remoteip localnet remotenet +do_esp ns3 10.0.3.1 10.0.3.10 10.0.1.0/24 10.0.2.0/24 $SPI1 $SPI2 +do_esp ns3 dead:3::1 dead:3::10 dead:1::/64 dead:2::/64 $SPI1 $SPI2 +do_esp ns4 10.0.3.10 10.0.3.1 10.0.2.0/24 10.0.1.0/24 $SPI2 $SPI1 +do_esp ns4 dead:3::10 dead:3::1 dead:2::/64 dead:1::/64 $SPI2 $SPI1 + +do_dummies4 ns3 +do_dummies6 ns4 + +# ping to .254 should use ipsec, exception is not installed. +check_xfrm 1 254 +if [ $? -ne 0 ]; then + echo "FAIL: expected ping to .254 to use ipsec tunnel" + ret=1 +else + echo "PASS: policy before exception matches" +fi + +# installs exceptions +# localip remoteip encryptdst plaindst +do_exception ns3 10.0.3.1 10.0.3.10 10.0.2.253 10.0.2.240/28 +do_exception ns4 10.0.3.10 10.0.3.1 10.0.1.253 10.0.1.240/28 + +do_exception ns3 dead:3::1 dead:3::10 dead:2::fd dead:2:f0::/96 +do_exception ns4 dead:3::10 dead:3::1 dead:1::fd dead:1:f0::/96 + +# ping to .254 should now be excluded from the tunnel +check_xfrm 0 254 +if [ $? -ne 0 ]; then + echo "FAIL: expected ping to .254 to fail" + ret=1 +else + echo "PASS: ping to .254 bypassed ipsec tunnel" +fi + +# ping to .253 should use use ipsec due to direct policy exception. +check_xfrm 1 253 +if [ $? -ne 0 ]; then + echo "FAIL: expected ping to .253 to use ipsec tunnel" + ret=1 +else + echo "PASS: direct policy matches" +fi + +# ping to .2 should use ipsec. +check_xfrm 1 2 +if [ $? -ne 0 ]; then + echo "FAIL: expected ping to .2 to use ipsec tunnel" + ret=1 +else + echo "PASS: policy matches" +fi + +for i in 1 2 3 4;do ip netns del ns$i;done + +exit $ret |