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Message-Id: <20251127-nft_flowtable-sh-ipv6-tcp-v2-1-c4162e5ee014@kernel.org>
Date: Thu, 27 Nov 2025 23:21:43 +0100
From: Lorenzo Bianconi <lorenzo@...nel.org>
To: Pablo Neira Ayuso <pablo@...filter.org>,
Jozsef Kadlecsik <kadlec@...filter.org>, Florian Westphal <fw@...len.de>,
Phil Sutter <phil@....cc>, "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>,
Shuah Khan <shuah@...nel.org>
Cc: netfilter-devel@...r.kernel.org, coreteam@...filter.org,
netdev@...r.kernel.org, linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org, Lorenzo Bianconi <lorenzo@...nel.org>
Subject: [PATCH nf-next v2] selftests: netfilter: nft_flowtable.sh: Add the
capability to send IPv6 TCP traffic
Introduce the capability to send TCP traffic over IPv6 to
nft_flowtable netfilter selftest.
Reviewed-by: Simon Horman <horms@...nel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
Changes in v2:
- Fix checkpatch warnings
- Add TCP test for IPv6 IPsec traffic
- Link to v1: https://lore.kernel.org/r/20251122-nft_flowtable-sh-ipv6-tcp-v1-1-4480d3c863a2@kernel.org
---
.../selftests/net/netfilter/nft_flowtable.sh | 57 ++++++++++++++++------
1 file changed, 43 insertions(+), 14 deletions(-)
diff --git a/tools/testing/selftests/net/netfilter/nft_flowtable.sh b/tools/testing/selftests/net/netfilter/nft_flowtable.sh
index 1fbfc8ad8dcdc5db2ab1a1ea9310f655d09eee83..a68bc882fa4ec0175d8db3df8337bb5fe6c42e26 100755
--- a/tools/testing/selftests/net/netfilter/nft_flowtable.sh
+++ b/tools/testing/selftests/net/netfilter/nft_flowtable.sh
@@ -127,6 +127,8 @@ ip -net "$nsr1" addr add fee1:2::1/64 dev veth1 nodad
ip -net "$nsr2" addr add 192.168.10.2/24 dev veth0
ip -net "$nsr2" addr add fee1:2::2/64 dev veth0 nodad
+ip netns exec "$nsr1" sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
+ip netns exec "$nsr2" sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
for i in 0 1; do
ip netns exec "$nsr1" sysctl net.ipv4.conf.veth$i.forwarding=1 > /dev/null
ip netns exec "$nsr2" sysctl net.ipv4.conf.veth$i.forwarding=1 > /dev/null
@@ -153,7 +155,9 @@ ip -net "$ns1" route add default via dead:1::1
ip -net "$ns2" route add default via dead:2::1
ip -net "$nsr1" route add default via 192.168.10.2
+ip -6 -net "$nsr1" route add default via fee1:2::2
ip -net "$nsr2" route add default via 192.168.10.1
+ip -6 -net "$nsr2" route add default via fee1:2::1
ip netns exec "$nsr1" nft -f - <<EOF
table inet filter {
@@ -352,8 +356,9 @@ test_tcp_forwarding_ip()
local nsa=$1
local nsb=$2
local pmtu=$3
- local dstip=$4
- local dstport=$5
+ local proto=$4
+ local dstip=$5
+ local dstport=$6
local lret=0
local socatc
local socatl
@@ -363,12 +368,14 @@ test_tcp_forwarding_ip()
infile="$nsin_small"
fi
- timeout "$SOCAT_TIMEOUT" ip netns exec "$nsb" socat -4 TCP-LISTEN:12345,reuseaddr STDIO < "$infile" > "$ns2out" &
+ timeout "$SOCAT_TIMEOUT" ip netns exec "$nsb" socat -${proto} \
+ TCP"${proto}"-LISTEN:12345,reuseaddr STDIO < "$infile" > "$ns2out" &
lpid=$!
busywait 1000 listener_ready
- timeout "$SOCAT_TIMEOUT" ip netns exec "$nsa" socat -4 TCP:"$dstip":"$dstport" STDIO < "$infile" > "$ns1out"
+ timeout "$SOCAT_TIMEOUT" ip netns exec "$nsa" socat -${proto} \
+ TCP"${proto}":"$dstip":"$dstport" STDIO < "$infile" > "$ns1out"
socatc=$?
wait $lpid
@@ -394,8 +401,11 @@ test_tcp_forwarding_ip()
test_tcp_forwarding()
{
local pmtu="$3"
+ local proto="$4"
+ local dstip="$5"
+ local dstport="$6"
- test_tcp_forwarding_ip "$1" "$2" "$pmtu" 10.0.2.99 12345
+ test_tcp_forwarding_ip "$1" "$2" "$pmtu" "$proto" "$dstip" "$dstport"
return $?
}
@@ -403,6 +413,9 @@ test_tcp_forwarding()
test_tcp_forwarding_set_dscp()
{
local pmtu="$3"
+ local proto="$4"
+ local dstip="$5"
+ local dstport="$6"
ip netns exec "$nsr1" nft -f - <<EOF
table netdev dscpmangle {
@@ -413,7 +426,7 @@ table netdev dscpmangle {
}
EOF
if [ $? -eq 0 ]; then
- test_tcp_forwarding_ip "$1" "$2" "$3" 10.0.2.99 12345
+ test_tcp_forwarding_ip "$1" "$2" "$pmtu" "$proto" "$dstip" "$dstport"
check_dscp "dscp_ingress" "$pmtu"
ip netns exec "$nsr1" nft delete table netdev dscpmangle
@@ -430,7 +443,7 @@ table netdev dscpmangle {
}
EOF
if [ $? -eq 0 ]; then
- test_tcp_forwarding_ip "$1" "$2" "$pmtu" 10.0.2.99 12345
+ test_tcp_forwarding_ip "$1" "$2" "$pmtu" "$proto" "$dstip" "$dstport"
check_dscp "dscp_egress" "$pmtu"
ip netns exec "$nsr1" nft delete table netdev dscpmangle
@@ -441,7 +454,7 @@ fi
# partial. If flowtable really works, then both dscp-is-0 and dscp-is-cs3
# counters should have seen packets (before and after ft offload kicks in).
ip netns exec "$nsr1" nft -a insert rule inet filter forward ip dscp set cs3
- test_tcp_forwarding_ip "$1" "$2" "$pmtu" 10.0.2.99 12345
+ test_tcp_forwarding_ip "$1" "$2" "$pmtu" "$proto" "$dstip" "$dstport"
check_dscp "dscp_fwd" "$pmtu"
}
@@ -455,7 +468,7 @@ test_tcp_forwarding_nat()
[ "$pmtu" -eq 0 ] && what="$what (pmtu disabled)"
- test_tcp_forwarding_ip "$nsa" "$nsb" "$pmtu" 10.0.2.99 12345
+ test_tcp_forwarding_ip "$nsa" "$nsb" "$pmtu" 4 10.0.2.99 12345
lret=$?
if [ "$lret" -eq 0 ] ; then
@@ -465,7 +478,7 @@ test_tcp_forwarding_nat()
echo "PASS: flow offload for ns1/ns2 with masquerade $what"
fi
- test_tcp_forwarding_ip "$1" "$2" "$pmtu" 10.6.6.6 1666
+ test_tcp_forwarding_ip "$1" "$2" "$pmtu" 4 10.6.6.6 1666
lret=$?
if [ "$pmtu" -eq 1 ] ;then
check_counters "flow offload for ns1/ns2 with dnat $what"
@@ -487,7 +500,7 @@ make_file "$nsin_small" "$filesize_small"
# Due to MTU mismatch in both directions, all packets (except small packets like pure
# acks) have to be handled by normal forwarding path. Therefore, packet counters
# are not checked.
-if test_tcp_forwarding "$ns1" "$ns2" 0; then
+if test_tcp_forwarding "$ns1" "$ns2" 0 4 10.0.2.99 12345; then
echo "PASS: flow offloaded for ns1/ns2"
else
echo "FAIL: flow offload for ns1/ns2:" 1>&2
@@ -495,6 +508,14 @@ else
ret=1
fi
+if test_tcp_forwarding "$ns1" "$ns2" 0 6 "[dead:2::99]" 12345; then
+ echo "PASS: IPv6 flow offloaded for ns1/ns2"
+else
+ echo "FAIL: IPv6 flow offload for ns1/ns2:" 1>&2
+ ip netns exec "$nsr1" nft list ruleset
+ ret=1
+fi
+
# delete default route, i.e. ns2 won't be able to reach ns1 and
# will depend on ns1 being masqueraded in nsr1.
# expect ns1 has nsr1 address.
@@ -520,7 +541,7 @@ table ip nat {
EOF
check_dscp "dscp_none" "0"
-if ! test_tcp_forwarding_set_dscp "$ns1" "$ns2" 0 ""; then
+if ! test_tcp_forwarding_set_dscp "$ns1" "$ns2" 0 4 10.0.2.99 12345; then
echo "FAIL: flow offload for ns1/ns2 with dscp update and no pmtu discovery" 1>&2
exit 0
fi
@@ -546,7 +567,7 @@ ip netns exec "$ns2" sysctl net.ipv4.ip_no_pmtu_disc=0 > /dev/null
ip netns exec "$nsr1" nft reset counters table inet filter >/dev/null
ip netns exec "$ns2" nft reset counters table inet filter >/dev/null
-if ! test_tcp_forwarding_set_dscp "$ns1" "$ns2" 1 ""; then
+if ! test_tcp_forwarding_set_dscp "$ns1" "$ns2" 1 4 10.0.2.99 12345; then
echo "FAIL: flow offload for ns1/ns2 with dscp update and pmtu discovery" 1>&2
exit 0
fi
@@ -752,7 +773,7 @@ ip -net "$ns2" route del 192.168.10.1 via 10.0.2.1
ip -net "$ns2" route add default via 10.0.2.1
ip -net "$ns2" route add default via dead:2::1
-if test_tcp_forwarding "$ns1" "$ns2" 1; then
+if test_tcp_forwarding "$ns1" "$ns2" 1 4 10.0.2.99 12345; then
check_counters "ipsec tunnel mode for ns1/ns2"
else
echo "FAIL: ipsec tunnel mode for ns1/ns2"
@@ -760,6 +781,14 @@ else
ip netns exec "$nsr1" cat /proc/net/xfrm_stat 1>&2
fi
+if test_tcp_forwarding "$ns1" "$ns2" 1 6 "[dead:2::99]" 12345; then
+ check_counters "IPv6 ipsec tunnel mode for ns1/ns2"
+else
+ echo "FAIL: IPv6 ipsec tunnel mode for ns1/ns2"
+ ip netns exec "$nsr1" nft list ruleset 1>&2
+ ip netns exec "$nsr1" cat /proc/net/xfrm_stat 1>&2
+fi
+
if [ "$1" = "" ]; then
low=1280
mtu=$((65536 - low))
---
base-commit: b044de87bae07a50b2d99d9acfea5a4323da95ed
change-id: 20251122-nft_flowtable-sh-ipv6-tcp-76f3d28169d1
Best regards,
--
Lorenzo Bianconi <lorenzo@...nel.org>
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