Skip to content

Commit

Permalink
selftests: forwarding: Add multicast routing test
Browse files Browse the repository at this point in the history 
Introduce basic testing for both IPv4 and IPv6 multicast. The test creates
an (S,G) type route, sends traffic and verifies traffic arrives when the
route is present and then verifies traffic does not arrive after deleting
the route.
This test requires smcroute - https://github.com/troglobit/smcroute which
is a tool that allows creation of static multicast routes.

Signed-off-by: Nir Dotan <nird@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
  • Loading branch information
@nirdotan @davem330
nirdotan authored and davem330 committed Dec 12, 2018
1 parent cf7221a commit 6d4efad
Show file tree
Hide file tree
Showing 2 changed files with 313 additions and 0 deletions.
2 changes: 2 additions & 0 deletions tools/testing/selftests/net/forwarding/lib.sh
View file
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,8 @@ PAUSE_ON_FAIL=${PAUSE_ON_FAIL:=no}
PAUSE_ON_CLEANUP=${PAUSE_ON_CLEANUP:=no}
NETIF_TYPE=${NETIF_TYPE:=veth}
NETIF_CREATE=${NETIF_CREATE:=yes}
MCD=${MCD:=smcrouted}
MC_CLI=${MC_CLI:=smcroutectl}

relative_path="${BASH_SOURCE%/*}"
if [[ "$relative_path" == "${BASH_SOURCE}" ]]; then
Expand Down
311 changes: 311 additions & 0 deletions tools/testing/selftests/net/forwarding/router_multicast.sh
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,311 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

# +------------------+
# | H1 (v$h1) |
# | 2001:db8:1::2/64 |
# | 198.51.100.2/28 |
# | $h1 + |
# +-------------|----+
# |
# +-------------|-------------------------------+
# | SW1 | |
# | $rp1 + |
# | 198.51.100.1/28 |
# | 2001:db8:1::1/64 |
# | |
# | 2001:db8:2::1/64 2001:db8:3::1/64 |
# | 198.51.100.17/28 198.51.100.33/28 |
# | $rp2 + $rp3 + |
# +--------------|--------------------------|---+
# | |
# | |
# +--------------|---+ +--------------|---+
# | H2 (v$h2) | | | H3 (v$h3) | |
# | $h2 + | | $h3 + |
# | 198.51.100.18/28 | | 198.51.100.34/28 |
# | 2001:db8:2::2/64 | | 2001:db8:3::2/64 |
# +------------------+ +------------------+
#

ALL_TESTS="mcast_v4 mcast_v6"
NUM_NETIFS=6
source lib.sh
source tc_common.sh

require_command $MCD
require_command $MC_CLI
table_name=selftests

h1_create()
{
simple_if_init $h1 198.51.100.2/28 2001:db8:1::2/64

ip route add 198.51.100.16/28 vrf v$h1 nexthop via 198.51.100.1
ip route add 198.51.100.32/28 vrf v$h1 nexthop via 198.51.100.1

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
}

h1_destroy()
{
ip route del 2001:db8:3::/64 vrf v$h1
ip route del 2001:db8:2::/64 vrf v$h1

ip route del 198.51.100.32/28 vrf v$h1
ip route del 198.51.100.16/28 vrf v$h1

simple_if_fini $h1 198.51.100.2/28 2001:db8:1::2/64
}

h2_create()
{
simple_if_init $h2 198.51.100.18/28 2001:db8:2::2/64

ip route add 198.51.100.0/28 vrf v$h2 nexthop via 198.51.100.17
ip route add 198.51.100.32/28 vrf v$h2 nexthop via 198.51.100.17

ip route add 2001:db8:1::/64 vrf v$h2 nexthop via 2001:db8:2::1
ip route add 2001:db8:3::/64 vrf v$h2 nexthop via 2001:db8:2::1

tc qdisc add dev $h2 ingress
}

h2_destroy()
{
tc qdisc del dev $h2 ingress

ip route del 2001:db8:3::/64 vrf v$h2
ip route del 2001:db8:1::/64 vrf v$h2

ip route del 198.51.100.32/28 vrf v$h2
ip route del 198.51.100.0/28 vrf v$h2

simple_if_fini $h2 198.51.100.18/28 2001:db8:2::2/64
}

h3_create()
{
simple_if_init $h3 198.51.100.34/28 2001:db8:3::2/64

ip route add 198.51.100.0/28 vrf v$h3 nexthop via 198.51.100.33
ip route add 198.51.100.16/28 vrf v$h3 nexthop via 198.51.100.33

ip route add 2001:db8:1::/64 vrf v$h3 nexthop via 2001:db8:3::1
ip route add 2001:db8:2::/64 vrf v$h3 nexthop via 2001:db8:3::1

tc qdisc add dev $h3 ingress
}

h3_destroy()
{
tc qdisc del dev $h3 ingress

ip route del 2001:db8:2::/64 vrf v$h3
ip route del 2001:db8:1::/64 vrf v$h3

ip route del 198.51.100.16/28 vrf v$h3
ip route del 198.51.100.0/28 vrf v$h3

simple_if_fini $h3 198.51.100.34/28 2001:db8:3::2/64
}

router_create()
{
ip link set dev $rp1 up
ip link set dev $rp2 up
ip link set dev $rp3 up

ip address add 198.51.100.1/28 dev $rp1
ip address add 198.51.100.17/28 dev $rp2
ip address add 198.51.100.33/28 dev $rp3

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
}

router_destroy()
{
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

ip address del 198.51.100.33/28 dev $rp3
ip address del 198.51.100.17/28 dev $rp2
ip address del 198.51.100.1/28 dev $rp1

ip link set dev $rp3 down
ip link set dev $rp2 down
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=${NETIFS[p1]}
rp1=${NETIFS[p2]}

rp2=${NETIFS[p3]}
h2=${NETIFS[p4]}

rp3=${NETIFS[p5]}
h3=${NETIFS[p6]}

start_mcd

vrf_prepare

h1_create
h2_create
h3_create

router_create

forwarding_enable
}

cleanup()
{
pre_cleanup

forwarding_restore

router_destroy

h3_destroy
h2_destroy
h1_destroy

vrf_cleanup

kill_mcd
}

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
}

mcast_v4()
{
# Add two interfaces to an MC group, send a packet to the MC group and
# verify packets are received on both. Then delete the route and verify
# packets are no longer received.

RET=0

tc filter add dev $h2 ingress protocol ip pref 1 handle 122 flower \
dst_ip 225.1.2.3 action drop
tc filter add dev $h3 ingress protocol ip pref 1 handle 133 flower \
dst_ip 225.1.2.3 action drop

create_mcast_sg $rp1 198.51.100.2 225.1.2.3 $rp2 $rp3

# Send frames with the corresponding L2 destination address.
$MZ $h1 -c 5 -p 128 -t udp -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" 122 5
check_err $? "Multicast not received on first host"
tc_check_packets "dev $h3 ingress" 133 5
check_err $? "Multicast not received on second host"

delete_mcast_sg $rp1 198.51.100.2 225.1.2.3 $rp2 $rp3

$MZ $h1 -c 5 -p 128 -t udp -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" 122 5
check_err $? "Multicast received on host although deleted"
tc_check_packets "dev $h3 ingress" 133 5
check_err $? "Multicast received on second host although deleted"

tc filter del dev $h3 ingress protocol ip pref 1 handle 133 flower
tc filter del dev $h2 ingress protocol ip pref 1 handle 122 flower

log_test "mcast IPv4"
}

mcast_v6()
{
# Add two interfaces to an MC group, send a packet to the MC group and
# verify packets are received on both. Then delete the route and verify
# packets are no longer received.

RET=0

tc filter add dev $h2 ingress protocol ipv6 pref 1 handle 122 flower \
dst_ip ff0e::3 action drop
tc filter add dev $h3 ingress protocol ipv6 pref 1 handle 133 flower \
dst_ip ff0e::3 action drop

create_mcast_sg $rp1 2001:db8:1::2 ff0e::3 $rp2 $rp3

# Send frames with the corresponding L2 destination address.
$MZ $h1 -6 -c 5 -p 128 -t udp -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" 122 5
check_err $? "Multicast not received on first host"
tc_check_packets "dev $h3 ingress" 133 5
check_err $? "Multicast not received on second host"

delete_mcast_sg $rp1 2001:db8:1::2 ff0e::3 $rp2 $rp3

$MZ $h1 -6 -c 5 -p 128 -t udp -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" 122 5
check_err $? "Multicast received on first host although deleted"
tc_check_packets "dev $h3 ingress" 133 5
check_err $? "Multicast received on second host although deleted"

tc filter del dev $h3 ingress protocol ipv6 pref 1 handle 133 flower
tc filter del dev $h2 ingress protocol ipv6 pref 1 handle 122 flower

log_test "mcast IPv6"
}

trap cleanup EXIT

setup_prepare
setup_wait

tests_run

exit $EXIT_STATUS

0 comments on commit 6d4efad

Please sign in to comment.