Linux Ethernet Bridging - Jul 2022 - [Bridge] [PATCH v4 net-next 6/6] selftests: forwarding: add test of MAC-Auth Bypass to locked port tests

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.

Signed-off-by: Hans Schultz <netdev at kapio-technology.com>
---
 .../net/forwarding/bridge_locked_port.sh      | 30 ++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
index 5b02b6b60ce7..1ee12d7b5c8b 100755
--- a/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
+++ b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
@@ -1,7 +1,7 @@
 #!/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"
 NUM_NETIFS=4
 CHECK_TC="no"
 source lib.sh
@@ -166,6 +166,34 @@ 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
+
+	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"
+}
 trap cleanup EXIT
 
 setup_prepare
-- 
2.30.2

On Thu, Jul 07, 2022 at 05:29:30PM +0200, Hans Schultz
wrote:
> +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
I was under the impression that we agreed that learning does not need to
be enabled in the bridge driver
> +
> +	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"
> +}
>  trap cleanup EXIT
>  
>  setup_prepare
> -- 
> 2.30.2
>