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selftests: mptcp: enable syncookie only in absence of reorders

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Syncookie validation may fail for OoO packets, causing spurious
resets and self-tests failures, so let's force syncookie only
for tests iteration with no OoO.

Fixes: fed61c4b58 ("selftests: mptcp: make 2nd net namespace use tcp syn cookies unconditionally")
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/198
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2021-06-10 15:59:43 -07:00 committed by David S. Miller
parent 61e710227e
commit 2395da0e17
1 changed files with 8 additions and 3 deletions
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11
tools/testing/selftests/net/mptcp/mptcp_connect.sh
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@ -197,9 +197,6 @@ ip -net "$ns4" link set ns4eth3 up
ip -net "$ns4" route add default via 10.0.3.2
ip -net "$ns4" route add default via dead:beef:3::2
# use TCP syn cookies, even if no flooding was detected.
ip netns exec "$ns2" sysctl -q net.ipv4.tcp_syncookies=2
set_ethtool_flags() {
local ns="$1"
local dev="$2"
@ -737,6 +734,14 @@ for sender in $ns1 $ns2 $ns3 $ns4;do
exit $ret
fi
# ns1<->ns2 is not subject to reordering/tc delays. Use it to test
# mptcp syncookie support.
if [ $sender = $ns1 ]; then
ip netns exec "$ns2" sysctl -q net.ipv4.tcp_syncookies=2
else
ip netns exec "$ns2" sysctl -q net.ipv4.tcp_syncookies=1
fi
run_tests "$ns2" $sender 10.0.1.2
run_tests "$ns2" $sender dead:beef:1::2
run_tests "$ns2" $sender 10.0.2.1