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selftests: forwarding: Add reverse path forwarding (RPF) test cases

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In case a packet is routed using a multicast route whose specified
ingress interface does not match the interface from which the packet was
received, the packet is dropped.

Add IPv4 and IPv6 test cases for above mentioned scenario.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2019-03-28 12:12:19 +00:00 committed by David S. Miller
parent eda3d1b022
commit ca059af852
1 changed files with 106 additions and 1 deletions
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107
tools/testing/selftests/net/forwarding/router_multicast.sh
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@ -28,7 +28,7 @@
# +------------------+ +------------------+
#
ALL_TESTS="mcast_v4 mcast_v6"
ALL_TESTS="mcast_v4 mcast_v6 rpf_v4 rpf_v6"
NUM_NETIFS=6
source lib.sh
source tc_common.sh
@ -46,10 +46,14 @@ h1_create()
ip route add 2001:db8:2::/64 vrf v$h1 nexthop via 2001:db8:1::1
ip route add 2001:db8:3::/64 vrf v$h1 nexthop via 2001:db8:1::1
tc qdisc add dev $h1 ingress
}
h1_destroy()
{
tc qdisc del dev $h1 ingress
ip route del 2001:db8:3::/64 vrf v$h1
ip route del 2001:db8:2::/64 vrf v$h1
@ -124,10 +128,14 @@ router_create()
ip address add 2001:db8:1::1/64 dev $rp1
ip address add 2001:db8:2::1/64 dev $rp2
ip address add 2001:db8:3::1/64 dev $rp3
tc qdisc add dev $rp3 ingress
}
router_destroy()
{
tc qdisc del dev $rp3 ingress
ip address del 2001:db8:3::1/64 dev $rp3
ip address del 2001:db8:2::1/64 dev $rp2
ip address del 2001:db8:1::1/64 dev $rp1
@ -301,6 +309,103 @@ mcast_v6()
log_test "mcast IPv6"
}
rpf_v4()
{
# Add a multicast route from first router port to the other two. Send
# matching packets and test that both hosts receive them. Then, send
# the same packets via the third router port and test that they do not
# reach any host due to RPF check. A filter with 'skip_hw' is added to
# test that devices capable of multicast routing offload trap those
# packets. The filter is essentialy a NOP in other scenarios.
RET=0
tc filter add dev $h1 ingress protocol ip pref 1 handle 1 flower \
dst_ip 225.1.2.3 ip_proto udp dst_port 12345 action drop
tc filter add dev $h2 ingress protocol ip pref 1 handle 1 flower \
dst_ip 225.1.2.3 ip_proto udp dst_port 12345 action drop
tc filter add dev $h3 ingress protocol ip pref 1 handle 1 flower \
dst_ip 225.1.2.3 ip_proto udp dst_port 12345 action drop
tc filter add dev $rp3 ingress protocol ip pref 1 handle 1 flower \
skip_hw dst_ip 225.1.2.3 ip_proto udp dst_port 12345 action pass
create_mcast_sg $rp1 198.51.100.2 225.1.2.3 $rp2 $rp3
$MZ $h1 -c 5 -p 128 -t udp "ttl=10,sp=54321,dp=12345" \
-a 00:11:22:33:44:55 -b 01:00:5e:01:02:03 \
-A 198.51.100.2 -B 225.1.2.3 -q
tc_check_packets "dev $h2 ingress" 1 5
check_err $? "Multicast not received on first host"
tc_check_packets "dev $h3 ingress" 1 5
check_err $? "Multicast not received on second host"
$MZ $h3 -c 5 -p 128 -t udp "ttl=10,sp=54321,dp=12345" \
-a 00:11:22:33:44:55 -b 01:00:5e:01:02:03 \
-A 198.51.100.2 -B 225.1.2.3 -q
tc_check_packets "dev $h1 ingress" 1 0
check_err $? "Multicast received on first host when should not"
tc_check_packets "dev $h2 ingress" 1 5
check_err $? "Multicast received on second host when should not"
tc_check_packets "dev $rp3 ingress" 1 5
check_err $? "Packets not trapped due to RPF check"
delete_mcast_sg $rp1 198.51.100.2 225.1.2.3 $rp2 $rp3
tc filter del dev $rp3 ingress protocol ip pref 1 handle 1 flower
tc filter del dev $h3 ingress protocol ip pref 1 handle 1 flower
tc filter del dev $h2 ingress protocol ip pref 1 handle 1 flower
tc filter del dev $h1 ingress protocol ip pref 1 handle 1 flower
log_test "RPF IPv4"
}
rpf_v6()
{
RET=0
tc filter add dev $h1 ingress protocol ipv6 pref 1 handle 1 flower \
dst_ip ff0e::3 ip_proto udp dst_port 12345 action drop
tc filter add dev $h2 ingress protocol ipv6 pref 1 handle 1 flower \
dst_ip ff0e::3 ip_proto udp dst_port 12345 action drop
tc filter add dev $h3 ingress protocol ipv6 pref 1 handle 1 flower \
dst_ip ff0e::3 ip_proto udp dst_port 12345 action drop
tc filter add dev $rp3 ingress protocol ipv6 pref 1 handle 1 flower \
skip_hw dst_ip ff0e::3 ip_proto udp dst_port 12345 action pass
create_mcast_sg $rp1 2001:db8:1::2 ff0e::3 $rp2 $rp3
$MZ $h1 -6 -c 5 -p 128 -t udp "ttl=10,sp=54321,dp=12345" \
-a 00:11:22:33:44:55 -b 33:33:00:00:00:03 \
-A 2001:db8:1::2 -B ff0e::3 -q
tc_check_packets "dev $h2 ingress" 1 5
check_err $? "Multicast not received on first host"
tc_check_packets "dev $h3 ingress" 1 5
check_err $? "Multicast not received on second host"
$MZ $h3 -6 -c 5 -p 128 -t udp "ttl=10,sp=54321,dp=12345" \
-a 00:11:22:33:44:55 -b 33:33:00:00:00:03 \
-A 2001:db8:1::2 -B ff0e::3 -q
tc_check_packets "dev $h1 ingress" 1 0
check_err $? "Multicast received on first host when should not"
tc_check_packets "dev $h2 ingress" 1 5
check_err $? "Multicast received on second host when should not"
tc_check_packets "dev $rp3 ingress" 1 5
check_err $? "Packets not trapped due to RPF check"
delete_mcast_sg $rp1 2001:db8:1::2 ff0e::3 $rp2 $rp3
tc filter del dev $rp3 ingress protocol ipv6 pref 1 handle 1 flower
tc filter del dev $h3 ingress protocol ipv6 pref 1 handle 1 flower
tc filter del dev $h2 ingress protocol ipv6 pref 1 handle 1 flower
tc filter del dev $h1 ingress protocol ipv6 pref 1 handle 1 flower
log_test "RPF IPv6"
}
trap cleanup EXIT
setup_prepare