[PATCH net-next 2/2] selftests: net: netfilter: nft_queue.sh: sctp checksum

[Antonio Ojea <aojea@google.com>]

Test that nfqueue, when using GSO, process SCTP packets
correctly.

Regression test for https://bugzilla.netfilter.org/show_bug.cgi?id=1742

Signed-off-by: Antonio Ojea <aojea@google.com>
---
 .../selftests/net/netfilter/nft_queue.sh      | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/tools/testing/selftests/net/netfilter/nft_queue.sh b/tools/testing/selftests/net/netfilter/nft_queue.sh
index 8538f08c64c2..5e075c7e0350 100755
--- a/tools/testing/selftests/net/netfilter/nft_queue.sh
+++ b/tools/testing/selftests/net/netfilter/nft_queue.sh
@@ -25,6 +25,9 @@ cleanup()
 }
 
 checktool "nft --version" "test without nft tool"
+checktool "socat -h" "run test without socat"
+
+modprobe -q sctp
 
 trap cleanup EXIT
 
@@ -375,6 +378,40 @@ EOF
 	wait 2>/dev/null
 }
 
+test_sctp_forward()
+{
+        ip netns exec "$nsrouter" nft -f /dev/stdin <<EOF
+table inet sctpq {
+        chain forward {
+        type filter hook forward priority 0; policy accept;
+                sctp dport 12345 queue num 10
+        }
+}
+EOF
+        ip netns exec "$nsrouter" ./nf_queue -q 10 -G -t "$timeout" &
+        local nfqpid=$!
+
+        timeout 5 ip netns exec "$ns2" socat -u SCTP-LISTEN:12345 STDOUT > "$TMPFILE1" &
+        local rpid=$!
+
+        # ss does not show the sctp socket?
+        busywait "$BUSYWAIT_TIMEOUT" sh -c "ps axf | grep -q SCTP-LISTEN" "$ns2"
+
+        ip netns exec "$ns1" socat -u STDIN SCTP:10.0.2.99:12345 <"$TMPINPUT" >/dev/null
+
+        if ! ip netns exec "$nsrouter" nft delete table inet sctpq; then
+                echo "FAIL:  Could not delete sctpq table"
+                exit 1
+        fi
+
+        if ! diff -u "$TMPINPUT" "$TMPFILE1" ; then
+                echo "FAIL: lost packets?!" 1>&2
+                return
+        fi
+
+        wait "$rpid" && echo "PASS: sctp and nfqueue in forward chain with GSO"
+}
+
 ip netns exec "$nsrouter" sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
 ip netns exec "$nsrouter" sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null
 ip netns exec "$nsrouter" sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null
@@ -413,5 +450,6 @@ test_tcp_localhost
 test_tcp_localhost_connectclose
 test_tcp_localhost_requeue
 test_icmp_vrf
+test_sctp_forward
 
 exit $ret
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog