diff options
Diffstat (limited to 'tools/testing/selftests/net/netfilter/nft_synproxy.sh')
-rwxr-xr-x | tools/testing/selftests/net/netfilter/nft_synproxy.sh | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/netfilter/nft_synproxy.sh b/tools/testing/selftests/net/netfilter/nft_synproxy.sh new file mode 100755 index 000000000000..293f667a6aec --- /dev/null +++ b/tools/testing/selftests/net/netfilter/nft_synproxy.sh @@ -0,0 +1,96 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +source lib.sh + +ret=0 + +checktool "nft --version" "run test without nft tool" +checktool "iperf3 --version" "run test without iperf3" + +setup_ns nsr ns1 ns2 + +modprobe -q nf_conntrack + +cleanup() { + ip netns pids "$ns1" | xargs kill 2>/dev/null + ip netns pids "$ns2" | xargs kill 2>/dev/null + + cleanup_all_ns +} + +trap cleanup EXIT + +ip link add veth0 netns "$nsr" type veth peer name eth0 netns "$ns1" +ip link add veth1 netns "$nsr" type veth peer name eth0 netns "$ns2" + +for dev in veth0 veth1; do + ip -net "$nsr" link set "$dev" up +done + +ip -net "$nsr" addr add 10.0.1.1/24 dev veth0 +ip -net "$nsr" addr add 10.0.2.1/24 dev veth1 + +ip netns exec "$nsr" sysctl -q net.ipv4.conf.veth0.forwarding=1 +ip netns exec "$nsr" sysctl -q net.ipv4.conf.veth1.forwarding=1 +ip netns exec "$nsr" sysctl -q net.netfilter.nf_conntrack_tcp_loose=0 + +for n in $ns1 $ns2; do + ip -net "$n" link set eth0 up +done +ip -net "$ns1" addr add 10.0.1.99/24 dev eth0 +ip -net "$ns2" addr add 10.0.2.99/24 dev eth0 +ip -net "$ns1" route add default via 10.0.1.1 +ip -net "$ns2" route add default via 10.0.2.1 + +# test basic connectivity +if ! ip netns exec "$ns1" ping -c 1 -q 10.0.2.99 > /dev/null; then + echo "ERROR: $ns1 cannot reach $ns2" 1>&2 + exit 1 +fi + +if ! ip netns exec "$ns2" ping -c 1 -q 10.0.1.99 > /dev/null; then + echo "ERROR: $ns2 cannot reach $ns1" 1>&2 + exit 1 +fi + +ip netns exec "$ns2" iperf3 -s > /dev/null 2>&1 & +# ip netns exec $nsr tcpdump -vvv -n -i veth1 tcp | head -n 10 & + +sleep 1 + +ip netns exec "$nsr" nft -f - <<EOF +table inet filter { + chain prerouting { + type filter hook prerouting priority -300; policy accept; + meta iif veth0 tcp flags syn counter notrack + } + + chain forward { + type filter hook forward priority 0; policy accept; + + ct state new,established counter accept + + meta iif veth0 meta l4proto tcp ct state untracked,invalid synproxy mss 1460 sack-perm timestamp + + ct state invalid counter drop + + # make ns2 unreachable w.o. tcp synproxy + tcp flags syn counter drop + } +} +EOF +if [ $? -ne 0 ]; then + echo "SKIP: Cannot add nft synproxy" + exit $ksft_skip +fi + +if ! ip netns exec "$ns1" timeout 5 iperf3 -c 10.0.2.99 -n $((1 * 1024 * 1024)) > /dev/null; then + echo "FAIL: iperf3 returned an error" 1>&2 + ret=1 + ip netns exec "$nsr" nft list ruleset +else + echo "PASS: synproxy connection successful" +fi + +exit $ret |