selftests: forwarding: Test gretap mirror with next-hop remote

#!/bin/bash

# SPDX-License-Identifier: GPL-2.0

# This test uses standard topology for testing gretap. See

# mirror_gre_topo_lib.sh for more details.

#

# Test that gretap and ip6gretap mirroring works when the other tunnel endpoint

# is reachable through a next-hop route (as opposed to directly-attached route).

NUM_NETIFS=6

source lib.sh

source mirror_lib.sh

source mirror_gre_lib.sh

source mirror_gre_topo_lib.sh

setup_prepare()

{

	h1=${NETIFS[p1]}

	swp1=${NETIFS[p2]}

	swp2=${NETIFS[p3]}

	h2=${NETIFS[p4]}

	swp3=${NETIFS[p5]}

	h3=${NETIFS[p6]}

	vrf_prepare

	mirror_gre_topo_create

	ip address add dev $swp3 192.0.2.161/28

	ip address add dev $h3 192.0.2.162/28

	ip address add dev gt4 192.0.2.129/32

	ip address add dev h3-gt4 192.0.2.130/32

	# IPv6 route can't be added after address. Such routes are rejected due

	# to the gateway address having been configured on the local system. It

	# works the other way around though.

	ip address add dev $swp3 2001:db8:4::1/64

	ip -6 route add 2001:db8:2::2/128 via 2001:db8:4::2

	ip address add dev $h3 2001:db8:4::2/64

	ip address add dev gt6 2001:db8:2::1

	ip address add dev h3-gt6 2001:db8:2::2

}

cleanup()

{

	pre_cleanup

	ip -6 route del 2001:db8:2::2/128 via 2001:db8:4::2

	ip address del dev $h3 2001:db8:4::2/64

	ip address del dev $swp3 2001:db8:4::1/64

	ip address del dev $h3 192.0.2.162/28

	ip address del dev $swp3 192.0.2.161/28

	mirror_gre_topo_destroy

	vrf_cleanup

}

test_gretap()

{

	RET=0

	mirror_install $swp1 ingress gt4 "matchall $tcflags"

	# For IPv4, test that there's no mirroring without the route directing

	# the traffic to tunnel remote address. Then add it and test that

	# mirroring starts. For IPv6 we can't test this due to the limitation

	# that routes for locally-specified IPv6 addresses can't be added.

	fail_test_span_gre_dir gt4 ingress

	ip route add 192.0.2.130/32 via 192.0.2.162

	quick_test_span_gre_dir gt4 ingress

	ip route del 192.0.2.130/32 via 192.0.2.162

	mirror_uninstall $swp1 ingress

	log_test "mirror to gre with next-hop remote ($tcflags)"

}

test_ip6gretap()

{

	RET=0

	mirror_install $swp1 ingress gt6 "matchall $tcflags"

	quick_test_span_gre_dir gt6 ingress

	mirror_uninstall $swp1 ingress

	log_test "mirror to ip6gre with next-hop remote ($tcflags)"

}

test_all()

{

	slow_path_trap_install $swp1 ingress

	slow_path_trap_install $swp1 egress

	test_gretap

	test_ip6gretap

	slow_path_trap_uninstall $swp1 egress

	slow_path_trap_uninstall $swp1 ingress

}

trap cleanup EXIT

setup_prepare

setup_wait

tcflags="skip_hw"

test_all

if ! tc_offload_check; then

	echo "WARN: Could not test offloaded functionality"

else

	tcflags="skip_sw"

	test_all

fi

exit $EXIT_STATUS