selftests: forwarding: router: Add test case for multicast destination MAC mismatch

Add test case to check that packets are not dropped when they need to be
routed and their multicast MAC mismatched to their multicast destination
IP.

i.e., destination IP is multicast and
	* for IPV4: DMAC !=  {01-00-5E-0 (25 bits), DIP[22:0]}
	* for IPV6: DMAC !=  {33-33-0 (16 bits), DIP[31:0]}

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/forwarding/router.sh b/tools/testing/selftests/net/forwarding/router.sh
index 6ad652ad7e73d0323665c85e307f57c0bf6761d9..e1f4d614532608781912f7ee924b9eaa6b7c4b14 100755 (executable)
--- a/tools/testing/selftests/net/forwarding/router.sh
+++ b/tools/testing/selftests/net/forwarding/router.sh
@@ -5,12 +5,17 @@ ALL_TESTS="
        ping_ipv4
        ping_ipv6
        sip_in_class_e
+       mc_mac_mismatch
 "
 
 NUM_NETIFS=4
 source lib.sh
 source tc_common.sh
 
+require_command $MCD
+require_command $MC_CLI
+table_name=selftests
+
 h1_create()
 {
        vrf_create "vrf-h1"
@@ -93,6 +98,25 @@ router_destroy()
        ip link set dev $rp1 down
 }
 
+start_mcd()
+{
+       SMCROUTEDIR="$(mktemp -d)"
+
+       for ((i = 1; i <= $NUM_NETIFS; ++i)); do
+               echo "phyint ${NETIFS[p$i]} enable" >> \
+                       $SMCROUTEDIR/$table_name.conf
+       done
+
+       $MCD -N -I $table_name -f $SMCROUTEDIR/$table_name.conf \
+               -P $SMCROUTEDIR/$table_name.pid
+}
+
+kill_mcd()
+{
+       pkill $MCD
+       rm -rf $SMCROUTEDIR
+}
+
 setup_prepare()
 {
        h1=${NETIFS[p1]}
@@ -103,6 +127,8 @@ setup_prepare()
 
        rp1mac=$(mac_get $rp1)
 
+       start_mcd
+
        vrf_prepare
 
        h1_create
@@ -125,6 +151,8 @@ cleanup()
        h1_destroy
 
        vrf_cleanup
+
+       kill_mcd
 }
 
 ping_ipv4()
@@ -161,6 +189,60 @@ sip_in_class_e()
        sysctl_restore net.ipv4.conf.all.rp_filter
 }
 
+create_mcast_sg()
+{
+       local if_name=$1; shift
+       local s_addr=$1; shift
+       local mcast=$1; shift
+       local dest_ifs=${@}
+
+       $MC_CLI -I $table_name add $if_name $s_addr $mcast $dest_ifs
+}
+
+delete_mcast_sg()
+{
+       local if_name=$1; shift
+       local s_addr=$1; shift
+       local mcast=$1; shift
+       local dest_ifs=${@}
+
+       $MC_CLI -I $table_name remove $if_name $s_addr $mcast $dest_ifs
+}
+
+__mc_mac_mismatch()
+{
+       local desc=$1; shift
+       local proto=$1; shift
+       local sip=$1; shift
+       local dip=$1; shift
+       local flags=${1:-""}; shift
+       local dmac=01:02:03:04:05:06
+
+       RET=0
+
+       tc filter add dev $rp2 egress protocol $proto pref 1 handle 101 \
+               flower dst_ip $dip action pass
+
+       create_mcast_sg $rp1 $sip $dip $rp2
+
+       $MZ $flags $h1 -t udp "sp=54321,dp=12345" -c 5 -d 1msec -b $dmac \
+               -B $dip -q
+
+       tc_check_packets "dev $rp2 egress" 101 5
+       check_err $? "Packets were dropped"
+
+       log_test "Multicast MAC mismatch: $desc"
+
+       delete_mcast_sg $rp1 $sip $dip $rp2
+       tc filter del dev $rp2 egress protocol $proto pref 1 handle 101 flower
+}
+
+mc_mac_mismatch()
+{
+       __mc_mac_mismatch "IPv4" "ip" 192.0.2.2 225.1.2.3
+       __mc_mac_mismatch "IPv6" "ipv6" 2001:db8:1::2 ff0e::3 "-6"
+}
+
 trap cleanup EXIT
 
 setup_prepare