#!/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 how mirrors to gretap and ip6gretap react to changes to relevant
# configuration.
ALL_TESTS="
test_ttl
test_tun_up
test_egress_up
test_remote_ip
test_tun_del
test_route_del
"
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
# This test downs $swp3, which deletes the configured IPv6 address
# unless this sysctl is set.
sysctl_set net.ipv6.conf.$swp3.keep_addr_on_down 1
ip address add dev $swp3 192.0.2.129/28
ip address add dev $h3 192.0.2.130/28
ip address add dev $swp3 2001:db8:2::1/64
ip address add dev $h3 2001:db8:2::2/64
}
cleanup()
{
pre_cleanup
ip address del dev $h3 2001:db8:2::2/64
ip address del dev $swp3 2001:db8:2::1/64
ip address del dev $h3 192.0.2.130/28
ip address del dev $swp3 192.0.2.129/28
sysctl_restore net.ipv6.conf.$swp3.keep_addr_on_down
mirror_gre_topo_destroy
vrf_cleanup
}
test_span_gre_ttl()
{
local tundev=$1; shift
local type=$1; shift
local prot=$1; shift
local what=$1; shift
RET=0
mirror_install $swp1 ingress $tundev \
"prot ip flower ip_prot icmp"
tc filter add dev $h3 ingress pref 77 prot $prot \
flower skip_hw ip_ttl 50 action pass
mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 0
ip link set dev $tundev type $type ttl 50
sleep 2
mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 ">= 10"
ip link set dev $tundev type $type ttl 100
tc filter del dev $h3 ingress pref 77
mirror_uninstall $swp1 ingress
log_test "$what: TTL change"
}
test_span_gre_tun_up()
{
local tundev=$1; shift
local what=$1; shift
RET=0
ip link set dev $tundev down
mirror_install $swp1 ingress $tundev "matchall"
fail_test_span_gre_dir $tundev
ip link set dev $tundev up
quick_test_span_gre_dir $tundev
mirror_uninstall $swp1 ingress
log_test "$what: tunnel down/up"
}
test_span_gre_egress_up()
{
local tundev=$1; shift
local remote_ip=$1; shift
local what=$1; shift
RET=0
ip link set dev $swp3 down
mirror_install $swp1 ingress $tundev "matchall"
fail_test_span_gre_dir $tundev
# After setting the device up, wait for neighbor to get resolved so that
# we can expect mirroring to work.
ip link set dev $swp3 up
setup_wait_dev $swp3
ping -c 1 -I $swp3 $remote_ip &>/dev/null
quick_test_span_gre_dir $tundev
mirror_uninstall $swp1 ingress
log_test "$what: egress down/up"
}
test_span_gre_remote_ip()
{
local tundev=$1; shift
local type=$1; shift
local correct_ip=$1; shift
local wrong_ip=$1; shift
local what=$1; shift
RET=0
ip link set dev $tundev type $type remote $wrong_ip
mirror_install $swp1 ingress $tundev "matchall"
fail_test_span_gre_dir $tundev
ip link set dev $tundev type $type remote $correct_ip
quick_test_span_gre_dir $tundev
mirror_uninstall $swp1 ingress
log_test "$what: remote address change"
}
test_span_gre_tun_del()
{
local tundev=$1; shift
local type=$1; shift
local flags=$1; shift
local local_ip=$1; shift
local remote_ip=$1; shift
local what=$1; shift
RET=0
mirror_install $swp1 ingress $tundev "matchall"
quick_test_span_gre_dir $tundev
ip link del dev $tundev
fail_test_span_gre_dir $tundev
tunnel_create $tundev $type $local_ip $remote_ip \
ttl 100 tos inherit $flags
# Recreating the tunnel doesn't reestablish mirroring, so reinstall it
# and verify it works for the follow-up tests.
mirror_uninstall $swp1 ingress
mirror_install $swp1 ingress $tundev "matchall"
quick_test_span_gre_dir $tundev
mirror_uninstall $swp1 ingress
log_test "$what: tunnel deleted"
}
test_span_gre_route_del()
{
local tundev=$1; shift
local edev=$1; shift
local route=$1; shift
local what=$1; shift
RET=0
mirror_install $swp1 ingress $tundev "matchall"
quick_test_span_gre_dir $tundev
ip route del $route dev $edev
fail_test_span_gre_dir $tundev
ip route add $route dev $edev
quick_test_span_gre_dir $tundev
mirror_uninstall $swp1 ingress
log_test "$what: underlay route removal"
}
test_ttl()
{
test_span_gre_ttl gt4 gretap ip "mirror to gretap"
test_span_gre_ttl gt6 ip6gretap ipv6 "mirror to ip6gretap"
}
test_tun_up()
{
test_span_gre_tun_up gt4 "mirror to gretap"
test_span_gre_tun_up gt6 "mirror to ip6gretap"
}
test_egress_up()
{
test_span_gre_egress_up gt4 192.0.2.130 "mirror to gretap"
test_span_gre_egress_up gt6 2001:db8:2::2 "mirror to ip6gretap"
}
test_remote_ip()
{
test_span_gre_remote_ip gt4 gretap 192.0.2.130 192.0.2.132 "mirror to gretap"
test_span_gre_remote_ip gt6 ip6gretap 2001:db8:2::2 2001:db8:2::4 "mirror to ip6gretap"
}
test_tun_del()
{
test_span_gre_tun_del gt4 gretap "" \
192.0.2.129 192.0.2.130 "mirror to gretap"
test_span_gre_tun_del gt6 ip6gretap allow-localremote \
2001:db8:2::1 2001:db8:2::2 "mirror to ip6gretap"
}
test_route_del()
{
test_span_gre_route_del gt4 $swp3 192.0.2.128/28 "mirror to gretap"
test_span_gre_route_del gt6 $swp3 2001:db8:2::/64 "mirror to ip6gretap"
}
trap cleanup EXIT
setup_prepare
setup_wait
tests_run
exit $EXIT_STATUS
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