selftests: net: bridge: factor out mcast_packet_test

Factor out mcast_packet_test into lib.sh so it can be later extended and
reused by MLDv2 tests.
Signed-off-by: NNikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>

tools/testing/selftests/net/forwarding/bridge_igmp.sh

@@ -105,38 +105,6 @@ cleanup()
 	vrf_cleanup
 }
 
-# return 0 if the packet wasn't seen on host2_if or 1 if it was
-mcast_packet_test()
-{
-	local mac=$1
-	local src_ip=$2
-	local ip=$3
-	local host1_if=$4
-	local host2_if=$5
-	local seen=0
-
-	# Add an ACL on `host2_if` which will tell us whether the packet
-	# was received by it or not.
-	tc qdisc add dev $host2_if ingress
-	tc filter add dev $host2_if ingress protocol ip pref 1 handle 101 \
-		flower ip_proto udp dst_mac $mac action drop
-
-	$MZ $host1_if -c 1 -p 64 -b $mac -A $src_ip -B $ip -t udp "dp=4096,sp=2048" -q
-	sleep 1
-
-	tc -j -s filter show dev $host2_if ingress \
-		| jq -e ".[] | select(.options.handle == 101) \
-		| select(.options.actions[0].stats.packets == 1)" &> /dev/null
-	if [[ $? -eq 0 ]]; then
-		seen=1
-	fi
-
-	tc filter del dev $host2_if ingress protocol ip pref 1 handle 101 flower
-	tc qdisc del dev $host2_if ingress
-
-	return $seen
-}
-
 v2reportleave_test()
 {
 	RET=0

tools/testing/selftests/net/forwarding/lib.sh

@@ -1270,3 +1270,35 @@ tcpdump_show()
 {
 	tcpdump -e -n -r $capfile 2>&1
 }
+
+# return 0 if the packet wasn't seen on host2_if or 1 if it was
+mcast_packet_test()
+{
+	local mac=$1
+	local src_ip=$2
+	local ip=$3
+	local host1_if=$4
+	local host2_if=$5
+	local seen=0
+
+	# Add an ACL on `host2_if` which will tell us whether the packet
+	# was received by it or not.
+	tc qdisc add dev $host2_if ingress
+	tc filter add dev $host2_if ingress protocol ip pref 1 handle 101 \
+		flower ip_proto udp dst_mac $mac action drop
+
+	$MZ $host1_if -c 1 -p 64 -b $mac -A $src_ip -B $ip -t udp "dp=4096,sp=2048" -q
+	sleep 1
+
+	tc -j -s filter show dev $host2_if ingress \
+		| jq -e ".[] | select(.options.handle == 101) \
+		| select(.options.actions[0].stats.packets == 1)" &> /dev/null
+	if [[ $? -eq 0 ]]; then
+		seen=1
+	fi
+
+	tc filter del dev $host2_if ingress protocol ip pref 1 handle 101 flower
+	tc qdisc del dev $host2_if ingress
+
+	return $seen
+}