As Ido's suggestion, this patch is to add a selftest for directed
broadcast forwarding with vrf. Just note that it puts the h2 into
the main route space, so that ping_test could get echo_reply.
Signed-off-by: Xin Long <lucien....@gmail.com>
---
.../selftests/net/forwarding/router_broadcast.sh | 142 +++++++++++++++++++++
1 file changed, 142 insertions(+)
create mode 100755 tools/testing/selftests/net/forwarding/router_broadcast.sh
diff --git a/tools/testing/selftests/net/forwarding/router_broadcast.sh
b/tools/testing/selftests/net/forwarding/router_broadcast.sh
new file mode 100755
index 0000000..6917768
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/router_broadcast.sh
@@ -0,0 +1,142 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+ALL_TESTS="ping_ipv4"
+NUM_NETIFS=4
+source lib.sh
+
+h1_create()
+{
+ vrf_create "vrf-h1"
+ ip link set dev $h1 master vrf-h1
+
+ ip link set dev vrf-h1 up
+ ip link set dev $h1 up
+
+ ip address add 192.0.2.2/24 dev $h1
+ ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1
+}
+
+h1_destroy()
+{
+ ip route del 198.51.100.0/24 vrf vrf-h1
+ ip address del 192.0.2.2/24 dev $h1
+
+ ip link set dev $h1 down
+ vrf_destroy "vrf-h1"
+}
+
+h2_create()
+{
+ ip link set dev $h2 up
+
+ ip address add 198.51.100.2/24 dev $h2
+ ip route add 192.0.2.0/24 dev $h2 via 198.51.100.1
+}
+
+h2_destroy()
+{
+ ip route del 192.0.2.0/24 dev $h2 via 198.51.100.1
+ ip address del 198.51.100.2/24 dev $h2
+
+ ip link set dev $h2 down
+}
+
+router_create()
+{
+ vrf_create "vrf-r1"
+ ip link set dev $rp1 master vrf-r1
+ ip link set dev $rp2 master vrf-r1
+
+ ip link set dev vrf-r1 up
+ ip link set dev $rp1 up
+ ip link set dev $rp2 up
+
+ ip address add 192.0.2.1/24 dev $rp1
+ ip address add 198.51.100.1/24 dev $rp2
+}
+
+router_destroy()
+{
+ ip address del 198.51.100.1/24 dev $rp2
+ ip address del 192.0.2.1/24 dev $rp1
+
+ ip link set dev $rp2 down
+ ip link set dev $rp1 down
+ vrf_destroy "vrf-r1"
+}
+
+bc_forwarding_disable()
+{
+ sysctl_set net.ipv4.conf.all.bc_forwarding 0
+ sysctl_set net.ipv4.conf.$rp1.bc_forwarding 0
+}
+
+bc_forwarding_enable()
+{
+ sysctl_set net.ipv4.conf.all.bc_forwarding 1
+ sysctl_set net.ipv4.conf.$rp1.bc_forwarding 1
+}
+
+bc_forwarding_restore()
+{
+ sysctl_restore net.ipv4.conf.$rp1.bc_forwarding
+ sysctl_restore net.ipv4.conf.all.bc_forwarding
+}
+
+setup_prepare()
+{
+ h1=${NETIFS[p1]}
+ rp1=${NETIFS[p2]}
+
+ rp2=${NETIFS[p3]}
+ h2=${NETIFS[p4]}
+
+ vrf_prepare
+
+ h1_create
+ h2_create
+
+ router_create
+
+ forwarding_enable
+}
+
+cleanup()
+{
+ pre_cleanup
+
+ forwarding_restore
+
+ router_destroy
+
+ h2_destroy
+ h1_destroy
+
+ vrf_cleanup
+}
+
+ping_ipv4()
+{
+ sysctl_set net.ipv4.icmp_echo_ignore_broadcasts 0
+ bc_forwarding_disable
+ ping_test $h1 198.51.100.255
+
+ iptables -A INPUT -i vrf-r1 -p icmp -j DROP
+ bc_forwarding_restore
+ bc_forwarding_enable
+ ping_test $h1 198.51.100.255
+
+ bc_forwarding_restore
+ iptables -D INPUT -i vrf-r1 -p icmp -j DROP
+ sysctl_restore net.ipv4.icmp_echo_ignore_broadcasts
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS
--
2.1.0
