Linux Ethernet Bridging - Mar 2022 - [Bridge] [PATCH v2 net-next 4/4] 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 <schultz.hans+netdev at gmail.com>
---
 .../net/forwarding/bridge_locked_port.sh      | 29 ++++++++++++++++++-
 1 file changed, 28 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 6e98efa6d371..2f9519e814b6 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
@@ -170,6 +170,33 @@ 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 port just locked"
+
+	if ! bridge fdb show | grep `mac_get $h1` | grep -q "locked"; then
+		RET=1
+		retmsg="MAB: No locked fdb entry after ping on locked port"
+	fi
+
+	bridge fdb del `mac_get $h1` dev $swp1 master
+	bridge fdb add `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"
+
+	log_test "Locked port MAB"
+}
 trap cleanup EXIT
 
 setup_prepare
-- 
2.30.2

On Thu, Mar 17, 2022 at 10:39:02AM +0100, Hans Schultz
wrote:
> 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 <schultz.hans+netdev at gmail.com>
> ---
>  .../net/forwarding/bridge_locked_port.sh      | 29 ++++++++++++++++++-
>  1 file changed, 28 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 6e98efa6d371..2f9519e814b6 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
> @@ -170,6 +170,33 @@ 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 port just locked"
> +
> +	if ! bridge fdb show | grep `mac_get $h1` | grep -q "locked";
then
> +		RET=1
> +		retmsg="MAB: No locked fdb entry after ping on locked port"
> +	fi
bridge fdb show | grep `mac_get $h1 | grep -q "locked"
check_err $? "MAB: No locked fdb entry after ping on locked port"
> +
> +	bridge fdb del `mac_get $h1` dev $swp1 master
> +	bridge fdb add `mac_get $h1` dev $swp1 master static
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"
> +
> +	log_test "Locked port MAB"
Clean up after the test to revert to initial state:

bridge fdb del `mac_get $h1` dev $swp1 master
bridge link set dev $swp1 locked off

> +}
>  trap cleanup EXIT
>  
>  setup_prepare
> -- 
> 2.30.2
>