Commit ca059af8 authored by Ido Schimmel's avatar Ido Schimmel Committed by David S. Miller
Browse files

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



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: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent eda3d1b0

tools/testing/selftests/net/forwarding/router_multicast.sh

+106 −1
Original line number Diff line number Diff line
@@ -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

CRA Git | Maintained and supported by SUSTech CRA and CCSE