[PATCH v5 net-next 6/6] selftests: forwarding: add test of MAC-Auth Bypass to locked port tests

Hans Schultz
2022-08-26T12:02:39Z

Verify that the MAC-Auth mechanism works by adding a FDB entry with the
locked flag set, denying access until the FDB entry is replaced with a
FDB entry without the locked flag set.

Also add a test that verifies that sticky FDB entries cannot roam.

Signed-off-by: Hans Schultz <netdev@kapio-technology.com>
---
.../net/forwarding/bridge_locked_port.sh | 107 +++++++++++++++++-
.../net/forwarding/bridge_sticky_fdb.sh | 21 +++-
2 files changed, 126 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/net/forwarding/bridge_locked_port.sh b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
index 5b02b6b60ce7..b763b3b9fdf0 100755
--- a/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
+++ b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
@@ -1,7 +1,15 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

-ALL_TESTS="locked_port_ipv4 locked_port_ipv6 locked_port_vlan"
+ALL_TESTS="
+ locked_port_ipv4
+ locked_port_ipv6
+ locked_port_vlan
+ locked_port_mab
+ locked_port_station_move
+ locked_port_mab_station_move
+"
+
NUM_NETIFS=4
CHECK_TC="no"
source lib.sh
@@ -166,6 +174,103 @@ locked_port_ipv6()
log_test "Locked port ipv6"
}

+locked_port_mab()
+{
+ RET=0
+ check_locked_port_support || return 0
+
+ ping_do $h1 192.0.2.2
+ check_err $? "MAB: Ping did not work before locking port"
+
+ bridge link set dev $swp1 locked on
+ bridge link set dev $swp1 learning on
+ if ! bridge link set dev $swp1 mab on 2>/dev/null; then
+ echo "SKIP: iproute2 too old; MacAuth feature not supported."
+ return $ksft_skip
+ fi
+
+ ping_do $h1 192.0.2.2
+ check_fail $? "MAB: Ping worked on locked port without FDB entry"
+
+ bridge fdb show | grep `mac_get $h1` | grep -q "locked"
+ check_err $? "MAB: No locked fdb entry after ping on locked port"
+
+ bridge fdb replace `mac_get $h1` dev $swp1 master static
+
+ ping_do $h1 192.0.2.2
+ check_err $? "MAB: Ping did not work with fdb entry without locked flag"
+
+ bridge fdb del `mac_get $h1` dev $swp1 master
+ bridge link set dev $swp1 learning off
+ bridge link set dev $swp1 locked off
+
+ log_test "Locked port MAB"
+}
+
+# No roaming allowed to a simple locked port
+locked_port_station_move()
+{
+ local mac=a0:b0:c0:c0:b0:a0
+
+ RET=0
+ check_locked_port_support || return 0
+
+ bridge link set dev $swp1 locked on
+ bridge link set dev $swp1 learning on
+
+ $MZ $h1 -q -t udp -a $mac -b rand
+ bridge fdb show dev $swp1 | grep -q "$mac vlan 1 master br0"
+ check_fail $? "Locked port station move: FDB entry on first injection"
+
+ $MZ $h2 -q -t udp -a $mac -b rand
+ bridge fdb show dev $swp2 | grep -q "$mac vlan 1 master br0"
+ check_err $? "Locked port station move: Entry not found on unlocked port"
+
+ $MZ $h1 -q -t udp -a $mac -b rand
+ bridge fdb show dev $swp1 | grep -q "$mac vlan 1 master br0"
+ check_fail $? "Locked port station move: entry roamed to locked port"
+
+ log_test "Locked port station move"
+}
+
+# Roaming to and from a MAB enabled port should work if sticky flag is not set
+locked_port_mab_station_move()
+{
+ local mac=10:20:30:30:20:10
+
+ RET=0
+ check_locked_port_support || return 0
+
+ bridge link set dev $swp1 locked on
+ bridge link set dev $swp1 learning on
+ if ! bridge link set dev $swp1 mab on 2>/dev/null; then
+ echo "SKIP: iproute2 too old; MacAuth feature not supported."
+ return $ksft_skip
+ fi
+
+ $MZ $h1 -q -t udp -a $mac -b rand
+ if bridge fdb show dev $swp1 | grep -q "$mac vlan 1 master br0" | grep -q sticky; then
+ echo "SKIP: Roaming not possible with sticky flag, run sticky flag roaming test"
+ return $ksft_skip
+ fi
+
+ bridge fdb show dev $swp1 | grep -q "$mac vlan 1 master br0 locked"
+ check_err $? "MAB station move: no locked entry on first injection"
+
+ $MZ $h2 -q -t udp -a $mac -b rand
+ bridge fdb show dev $swp1 | grep -q "$mac vlan 1 master br0 locked"
+ check_fail $? "MAB station move: locked entry did not move"
+
+ bridge fdb show dev $swp2 | grep -q "$mac vlan 1 master br0"
+ check_err $? "MAB station move: roamed entry not found"
+
+ $MZ $h1 -q -t udp -a $mac -b rand
+ bridge fdb show dev $swp1 | grep -q "$mac vlan 1 master br0 locked"
+ check_err $? "MAB station move: entry did not roam back to locked port"
+
+ log_test "Locked port MAB station move"
+}
+
trap cleanup EXIT

setup_prepare
diff --git a/tools/testing/selftests/net/forwarding/bridge_sticky_fdb.sh b/tools/testing/selftests/net/forwarding/bridge_sticky_fdb.sh
index 1f8ef0eff862..bca77bc3fe09 100755
--- a/tools/testing/selftests/net/forwarding/bridge_sticky_fdb.sh
+++ b/tools/testing/selftests/net/forwarding/bridge_sticky_fdb.sh
@@ -1,7 +1,7 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

-ALL_TESTS="sticky"
+ALL_TESTS="sticky sticky_no_roaming"
NUM_NETIFS=4
TEST_MAC=de:ad:be:ef:13:37
source lib.sh
@@ -59,6 +59,25 @@ sticky()
log_test "Sticky fdb entry"
}

+# No roaming allowed with the sticky flag set
+sticky_no_roaming()
+{
+ local mac=a8:b4:c2:c2:b4:a8
+
+ RET=0
+
+ bridge link set dev $swp2 learning on
+ bridge fdb add $mac dev $swp1 master static sticky
+ bridge fdb show dev $swp1 | grep "$mac master br0" | grep -q sticky
+ check_err $? "Sticky no roaming: No sticky FDB entry found after adding"
+
+ $MZ $h2 -q -t udp -c 10 -d 100msec -a $mac -b rand
+ bridge fdb show dev $swp2 | grep "$mac master br0" | grep -q sticky
+ check_fail $? "Sticky no roaming: Sticky entry roamed"
+
+ log_test "Sticky no roaming"
+}
+
trap cleanup EXIT

setup_prepare
--
2.30.2