path: root/tools/testing/selftests/net/forwarding/bridge_igmp.sh

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

ALL_TESTS="v2reportleave_test v3include_test v3inc_allow_test v3inc_is_include_test \
	   v3inc_is_exclude_test v3inc_to_exclude_test"
NUM_NETIFS=4
CHECK_TC="yes"
TEST_GROUP="239.10.10.10"
TEST_GROUP_MAC="01:00:5e:0a:0a:0a"

ALL_GROUP="224.0.0.1"
ALL_MAC="01:00:5e:00:00:01"

# IGMPv3 is_in report: grp 239.10.10.10 is_include 192.0.2.1,192.0.2.2,192.0.2.3
MZPKT_IS_INC="22:00:9d:de:00:00:00:01:01:00:00:03:ef:0a:0a:0a:c0:00:02:01:c0:00:02:02:c0:00:02:03"
# IGMPv3 is_in report: grp 239.10.10.10 is_include 192.0.2.10,192.0.2.11,192.0.2.12
MZPKT_IS_INC2="22:00:9d:c3:00:00:00:01:01:00:00:03:ef:0a:0a:0a:c0:00:02:0a:c0:00:02:0b:c0:00:02:0c"
# IGMPv3 allow report: grp 239.10.10.10 allow 192.0.2.10,192.0.2.11,192.0.2.12
MZPKT_ALLOW="22:00:99:c3:00:00:00:01:05:00:00:03:ef:0a:0a:0a:c0:00:02:0a:c0:00:02:0b:c0:00:02:0c"
# IGMPv3 is_ex report: grp 239.10.10.10 is_exclude 192.0.2.1,192.0.2.2,192.0.2.20,192.0.2.21
MZPKT_IS_EXC="22:00:da:b6:00:00:00:01:02:00:00:04:ef:0a:0a:0a:c0:00:02:01:c0:00:02:02:c0:00:02:14:c0:00:02:15"
# IGMPv3 to_ex report: grp 239.10.10.10 to_exclude 192.0.2.1,192.0.2.20,192.0.2.30
MZPKT_TO_EXC="22:00:9a:b1:00:00:00:01:04:00:00:03:ef:0a:0a:0a:c0:00:02:01:c0:00:02:14:c0:00:02:1e"

source lib.sh

h1_create()
{
	simple_if_init $h1 192.0.2.1/24 2001:db8:1::1/64
}

h1_destroy()
{
	simple_if_fini $h1 192.0.2.1/24 2001:db8:1::1/64
}

h2_create()
{
	simple_if_init $h2 192.0.2.2/24 2001:db8:1::2/64
}

h2_destroy()
{
	simple_if_fini $h2 192.0.2.2/24 2001:db8:1::2/64
}

switch_create()
{
	ip link add dev br0 type bridge mcast_snooping 1 mcast_querier 1

	ip link set dev $swp1 master br0
	ip link set dev $swp2 master br0

	ip link set dev br0 up
	ip link set dev $swp1 up
	ip link set dev $swp2 up
}

switch_destroy()
{
	ip link set dev $swp2 down
	ip link set dev $swp1 down

	ip link del dev br0
}

setup_prepare()
{
	h1=${NETIFS[p1]}
	swp1=${NETIFS[p2]}

	swp2=${NETIFS[p3]}
	h2=${NETIFS[p4]}

	vrf_prepare

	h1_create
	h2_create

	switch_create
}

cleanup()
{
	pre_cleanup

	switch_destroy

	# Always cleanup the mcast group
	ip address del dev $h2 $TEST_GROUP/32 2>&1 1>/dev/null

	h2_destroy
	h1_destroy

	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
	ip address add dev $h2 $TEST_GROUP/32 autojoin
	check_err $? "Could not join $TEST_GROUP"

	sleep 5
	bridge mdb show dev br0 | grep $TEST_GROUP 1>/dev/null
	check_err $? "IGMPv2 report didn't create mdb entry for $TEST_GROUP"

	mcast_packet_test $TEST_GROUP_MAC 192.0.2.1 $TEST_GROUP $h1 $h2
	check_fail $? "Traffic to $TEST_GROUP wasn't forwarded"

	log_test "IGMPv2 report $TEST_GROUP"

	RET=0
	bridge mdb show dev br0 | grep $TEST_GROUP 1>/dev/null
	check_err $? "mdb entry for $TEST_GROUP is missing"

	ip address del dev $h2 $TEST_GROUP/32
	check_err $? "Could not leave $TEST_GROUP"

	sleep 5
	bridge mdb show dev br0 | grep $TEST_GROUP 1>/dev/null
	check_fail $? "Leave didn't delete mdb entry for $TEST_GROUP"

	mcast_packet_test $TEST_GROUP_MAC 192.0.2.1 $TEST_GROUP $h1 $h2
	check_err $? "Traffic to $TEST_GROUP was forwarded without mdb entry"

	log_test "IGMPv2 leave $TEST_GROUP"
}

check_sg_entries()
{
	local report=$1; shift
	local slist=("$@")
	local sarg=""

	for src in "${slist[@]}"; do
		sarg="${sarg} and .source_list[].address == \"$src\""
	done
	bridge -j -d -s mdb show dev br0 \
		| jq -e ".[].mdb[] | \
			 select(.grp == \"$TEST_GROUP\" and .source_list != null $sarg)" &>/dev/null
	check_err $? "Wrong *,G entry source list after $report report"

	for sgent in "${slist[@]}"; do
		bridge -j -d -s mdb show dev br0 \
			| jq -e ".[].mdb[] | \
				 select(.grp == \"$TEST_GROUP\" and .src == \"$sgent\")" &>/dev/null
		check_err $? "Missing S,G entry ($sgent, $TEST_GROUP)"
	done
}

check_sg_fwding()
{
	local should_fwd=$1; shift
	local sources=("$@")

	for src in "${sources[@]}"; do
		local retval=0

		mcast_packet_test $TEST_GROUP_MAC $src $TEST_GROUP $h2 $h1
		retval=$?
		if [ $should_fwd -eq 1 ]; then
			check_fail $retval "Didn't forward traffic from S,G ($src, $TEST_GROUP)"
		else
			check_err $retval "Forwarded traffic for blocked S,G ($src, $TEST_GROUP)"
		fi
	done
}

check_sg_state()
{
	local is_blocked=$1; shift
	local sources=("$@")
	local should_fail=1

	if [ $is_blocked -eq 1 ]; then
		should_fail=0
	fi

	for src in "${sources[@]}"; do
		bridge -j -d -s mdb show dev br0 \
			| jq -e ".[].mdb[] | \
				 select(.grp == \"$TEST_GROUP\" and .source_list != null) |
				 .source_list[] |
				 select(.address == \"$src\") |
				 select(.timer == \"0.00\")" &>/dev/null
		check_err_fail $should_fail $? "Entry $src has zero timer"

		bridge -j -d -s mdb show dev br0 \
			| jq -e ".[].mdb[] | \
				 select(.grp == \"$TEST_GROUP\" and .src == \"$src\" and \
				 .flags[] == \"blocked\")" &>/dev/null
		check_err_fail $should_fail $? "Entry $src has blocked flag"
	done
}

v3include_prepare()
{
	local host1_if=$1
	local mac=$2
	local group=$3
	local X=("192.0.2.1" "192.0.2.2" "192.0.2.3")

	ip link set dev br0 type bridge mcast_igmp_version 3
	check_err $? "Could not change bridge IGMP version to 3"

	$MZ $host1_if -b $mac -c 1 -B $group -t ip "proto=2,p=$MZPKT_IS_INC" -q
	sleep 1
	bridge -j -d -s mdb show dev br0 \
		| jq -e ".[].mdb[] | \
			 select(.grp == \"$TEST_GROUP\" and .source_list != null)" &>/dev/null
	check_err $? "Missing *,G entry with source list"
	bridge -j -d -s mdb show dev br0 \
		| jq -e ".[].mdb[] | \
			 select(.grp == \"$TEST_GROUP\" and \
				.source_list != null and .filter_mode == \"include\")" &>/dev/null
	check_err $? "Wrong *,G entry filter mode"
	check_sg_entries "is_include" "${X[@]}"
}

v3cleanup()
{
	local port=$1
	local group=$2

	bridge mdb del dev br0 port $port grp $group
	ip link set dev br0 type bridge mcast_igmp_version 2
}

v3include_test()
{
	RET=0
	local X=("192.0.2.1" "192.0.2.2" "192.0.2.3")

	v3include_prepare $h1 $ALL_MAC $ALL_GROUP

	check_sg_state 0 "${X[@]}"

	check_sg_fwding 1 "${X[@]}"
	check_sg_fwding 0 "192.0.2.100"

	log_test "IGMPv3 report $TEST_GROUP is_include"

	v3cleanup $swp1 $TEST_GROUP
}

v3inc_allow_test()
{
	RET=0
	local X=("192.0.2.10" "192.0.2.11" "192.0.2.12")

	v3include_prepare $h1 $ALL_MAC $ALL_GROUP

	$MZ $h1 -c 1 -b $ALL_MAC -B $ALL_GROUP -t ip "proto=2,p=$MZPKT_ALLOW" -q
	sleep 1
	check_sg_entries "allow" "${X[@]}"

	check_sg_state 0 "${X[@]}"

	check_sg_fwding 1 "${X[@]}"
	check_sg_fwding 0 "192.0.2.100"

	log_test "IGMPv3 report $TEST_GROUP include -> allow"

	v3cleanup $swp1 $TEST_GROUP
}

v3inc_is_include_test()
{
	RET=0
	local X=("192.0.2.10" "192.0.2.11" "192.0.2.12")

	v3include_prepare $h1 $ALL_MAC $ALL_GROUP

	$MZ $h1 -c 1 -b $ALL_MAC -B $ALL_GROUP -t ip "proto=2,p=$MZPKT_IS_INC2" -q
	sleep 1
	check_sg_entries "is_include" "${X[@]}"

	check_sg_state 0 "${X[@]}"

	check_sg_fwding 1 "${X[@]}"
	check_sg_fwding 0 "192.0.2.100"

	log_test "IGMPv3 report $TEST_GROUP include -> is_include"

	v3cleanup $swp1 $TEST_GROUP
}

v3inc_is_exclude_test()
{
	RET=0
	local X=("192.0.2.1" "192.0.2.2")
	local Y=("192.0.2.20" "192.0.2.21")

	v3include_prepare $h1 $ALL_MAC $ALL_GROUP

	$MZ $h1 -c 1 -b $ALL_MAC -B $ALL_GROUP -t ip "proto=2,p=$MZPKT_IS_EXC" -q
	sleep 1
	bridge -j -d -s mdb show dev br0 \
		| jq -e ".[].mdb[] | \
			 select(.grp == \"$TEST_GROUP\" and \
				.source_list != null and .filter_mode == \"exclude\")" &>/dev/null
	check_err $? "Wrong *,G entry filter mode"

	check_sg_entries "is_exclude" "${X[@]}" "${Y[@]}"

	check_sg_state 0 "${X[@]}"
	check_sg_state 1 "${Y[@]}"

	bridge -j -d -s mdb show dev br0 \
		| jq -e ".[].mdb[] | \
			 select(.grp == \"$TEST_GROUP\" and \
				.source_list != null and
				.source_list[].address == \"192.0.2.3\")" &>/dev/null
	check_fail $? "Wrong *,G entry source list, 192.0.2.3 entry still exists"

	check_sg_fwding 1 "${X[@]}" 192.0.2.100
	check_sg_fwding 0 "${Y[@]}"

	log_test "IGMPv3 report $TEST_GROUP include -> is_exclude"

	v3cleanup $swp1 $TEST_GROUP
}

v3inc_to_exclude_test()
{
	RET=0
	local X=("192.0.2.1")
	local Y=("192.0.2.20" "192.0.2.30")

	v3include_prepare $h1 $ALL_MAC $ALL_GROUP

	ip link set dev br0 type bridge mcast_last_member_interval 500
	check_err $? "Could not change mcast_last_member_interval to 5s"

	$MZ $h1 -c 1 -b $ALL_MAC -B $ALL_GROUP -t ip "proto=2,p=$MZPKT_TO_EXC" -q
	sleep 1
	bridge -j -d -s mdb show dev br0 \
		| jq -e ".[].mdb[] | \
			 select(.grp == \"$TEST_GROUP\" and \
				.source_list != null and .filter_mode == \"exclude\")" &>/dev/null
	check_err $? "Wrong *,G entry filter mode"

	check_sg_entries "to_exclude" "${X[@]}" "${Y[@]}"

	check_sg_state 0 "${X[@]}"
	check_sg_state 1 "${Y[@]}"

	bridge -j -d -s mdb show dev br0 \
		| jq -e ".[].mdb[] | \
			 select(.grp == \"$TEST_GROUP\" and \
				.source_list != null and
				.source_list[].address == \"192.0.2.2\")" &>/dev/null
	check_fail $? "Wrong *,G entry source list, 192.0.2.2 entry still exists"
	bridge -j -d -s mdb show dev br0 \
		| jq -e ".[].mdb[] | \
			 select(.grp == \"$TEST_GROUP\" and \
				.source_list != null and
				.source_list[].address == \"192.0.2.21\")" &>/dev/null
	check_fail $? "Wrong *,G entry source list, 192.0.2.21 entry still exists"

	check_sg_fwding 1 "${X[@]}" 192.0.2.100
	check_sg_fwding 0 "${Y[@]}"

	log_test "IGMPv3 report $TEST_GROUP include -> to_exclude"

	ip link set dev br0 type bridge mcast_last_member_interval 100

	v3cleanup $swp1 $TEST_GROUP
}

trap cleanup EXIT

setup_prepare
setup_wait

tests_run

exit $EXIT_STATUS