| #!/bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # |
| # Test a "one-armed router" [1] scenario. Packets forwarded between H1 and H2 |
| # should be forwarded by the ASIC, but also trapped so that ICMP redirect |
| # packets could be potentially generated. |
| # |
| # 1. https://en.wikipedia.org/wiki/One-armed_router |
| # |
| # +---------------------------------+ |
| # | H1 (vrf) | |
| # | + $h1 | |
| # | | 192.0.2.1/24 | |
| # | | 2001:db8:1::1/64 | |
| # | | | |
| # | | default via 192.0.2.2 | |
| # | | default via 2001:db8:1::2 | |
| # +----|----------------------------+ |
| # | |
| # +----|----------------------------------------------------------------------+ |
| # | SW | | |
| # | +--|--------------------------------------------------------------------+ | |
| # | | + $swp1 BR0 (802.1d) | | |
| # | | | | |
| # | | 192.0.2.2/24 | | |
| # | | 2001:db8:1::2/64 | | |
| # | | 198.51.100.2/24 | | |
| # | | 2001:db8:2::2/64 | | |
| # | | | | |
| # | | + $swp2 | | |
| # | +--|--------------------------------------------------------------------+ | |
| # | | | |
| # +----|----------------------------------------------------------------------+ |
| # | |
| # +----|----------------------------+ |
| # | | default via 198.51.100.2 | |
| # | | default via 2001:db8:2::2 | |
| # | | | |
| # | | 2001:db8:2::1/64 | |
| # | | 198.51.100.1/24 | |
| # | + $h2 | |
| # | H2 (vrf) | |
| # +---------------------------------+ |
| |
| lib_dir=$(dirname $0)/../../../net/forwarding |
| |
| ALL_TESTS="ping_ipv4 ping_ipv6 fwd_mark_ipv4 fwd_mark_ipv6" |
| NUM_NETIFS=4 |
| source $lib_dir/tc_common.sh |
| source $lib_dir/lib.sh |
| |
| h1_create() |
| { |
| simple_if_init $h1 192.0.2.1/24 2001:db8:1::1/64 |
| |
| ip -4 route add default vrf v$h1 nexthop via 192.0.2.2 |
| ip -6 route add default vrf v$h1 nexthop via 2001:db8:1::2 |
| } |
| |
| h1_destroy() |
| { |
| ip -6 route del default vrf v$h1 nexthop via 2001:db8:1::2 |
| ip -4 route del default vrf v$h1 nexthop via 192.0.2.2 |
| |
| simple_if_fini $h1 192.0.2.1/24 2001:db8:1::1/64 |
| } |
| |
| h2_create() |
| { |
| simple_if_init $h2 198.51.100.1/24 2001:db8:2::1/64 |
| |
| ip -4 route add default vrf v$h2 nexthop via 198.51.100.2 |
| ip -6 route add default vrf v$h2 nexthop via 2001:db8:2::2 |
| } |
| |
| h2_destroy() |
| { |
| ip -6 route del default vrf v$h2 nexthop via 2001:db8:2::2 |
| ip -4 route del default vrf v$h2 nexthop via 198.51.100.2 |
| |
| simple_if_fini $h2 198.51.100.1/24 2001:db8:2::1/64 |
| } |
| |
| switch_create() |
| { |
| ip link add name br0 type bridge mcast_snooping 0 |
| ip link set dev br0 up |
| |
| ip link set dev $swp1 master br0 |
| ip link set dev $swp1 up |
| ip link set dev $swp2 master br0 |
| ip link set dev $swp2 up |
| |
| tc qdisc add dev $swp1 clsact |
| tc qdisc add dev $swp2 clsact |
| |
| __addr_add_del br0 add 192.0.2.2/24 2001:db8:1::2/64 |
| __addr_add_del br0 add 198.51.100.2/24 2001:db8:2::2/64 |
| } |
| |
| switch_destroy() |
| { |
| __addr_add_del br0 del 198.51.100.2/24 2001:db8:2::2/64 |
| __addr_add_del br0 del 192.0.2.2/24 2001:db8:1::2/64 |
| |
| tc qdisc del dev $swp2 clsact |
| tc qdisc del dev $swp1 clsact |
| |
| ip link set dev $swp2 down |
| ip link set dev $swp2 nomaster |
| ip link set dev $swp1 down |
| ip link set dev $swp1 nomaster |
| |
| ip link set dev br0 down |
| ip link del dev br0 |
| } |
| |
| ping_ipv4() |
| { |
| ping_test $h1 198.51.100.1 ": h1->h2" |
| } |
| |
| ping_ipv6() |
| { |
| ping6_test $h1 2001:db8:2::1 ": h1->h2" |
| } |
| |
| fwd_mark_ipv4() |
| { |
| # Transmit packets from H1 to H2 and make sure they are trapped at |
| # swp1 due to loopback error, but only forwarded by the ASIC through |
| # swp2 |
| |
| tc filter add dev $swp1 ingress protocol ip pref 1 handle 101 flower \ |
| skip_hw dst_ip 198.51.100.1 ip_proto udp dst_port 52768 \ |
| action pass |
| |
| tc filter add dev $swp2 egress protocol ip pref 1 handle 101 flower \ |
| skip_hw dst_ip 198.51.100.1 ip_proto udp dst_port 52768 \ |
| action pass |
| |
| tc filter add dev $swp2 egress protocol ip pref 2 handle 102 flower \ |
| skip_sw dst_ip 198.51.100.1 ip_proto udp dst_port 52768 \ |
| action pass |
| |
| ip vrf exec v$h1 $MZ $h1 -c 10 -d 100msec -p 64 -A 192.0.2.1 \ |
| -B 198.51.100.1 -t udp dp=52768,sp=42768 -q |
| |
| RET=0 |
| |
| tc_check_packets "dev $swp1 ingress" 101 10 |
| check_err $? |
| |
| log_test "fwd mark: trapping IPv4 packets due to LBERROR" |
| |
| RET=0 |
| |
| tc_check_packets "dev $swp2 egress" 101 0 |
| check_err $? |
| |
| log_test "fwd mark: forwarding IPv4 packets in software" |
| |
| RET=0 |
| |
| tc_check_packets "dev $swp2 egress" 102 10 |
| check_err $? |
| |
| log_test "fwd mark: forwarding IPv4 packets in hardware" |
| |
| tc filter del dev $swp2 egress protocol ip pref 2 handle 102 flower |
| tc filter del dev $swp2 egress protocol ip pref 1 handle 101 flower |
| tc filter del dev $swp1 ingress protocol ip pref 1 handle 101 flower |
| } |
| |
| fwd_mark_ipv6() |
| { |
| tc filter add dev $swp1 ingress protocol ipv6 pref 1 handle 101 flower \ |
| skip_hw dst_ip 2001:db8:2::1 ip_proto udp dst_port 52768 \ |
| action pass |
| |
| tc filter add dev $swp2 egress protocol ipv6 pref 1 handle 101 flower \ |
| skip_hw dst_ip 2001:db8:2::1 ip_proto udp dst_port 52768 \ |
| action pass |
| |
| tc filter add dev $swp2 egress protocol ipv6 pref 2 handle 102 flower \ |
| skip_sw dst_ip 2001:db8:2::1 ip_proto udp dst_port 52768 \ |
| action pass |
| |
| ip vrf exec v$h1 $MZ $h1 -6 -c 10 -d 100msec -p 64 -A 2001:db8:1::1 \ |
| -B 2001:db8:2::1 -t udp dp=52768,sp=42768 -q |
| |
| RET=0 |
| |
| tc_check_packets "dev $swp1 ingress" 101 10 |
| check_err $? |
| |
| log_test "fwd mark: trapping IPv6 packets due to LBERROR" |
| |
| RET=0 |
| |
| tc_check_packets "dev $swp2 egress" 101 0 |
| check_err $? |
| |
| log_test "fwd mark: forwarding IPv6 packets in software" |
| |
| RET=0 |
| |
| tc_check_packets "dev $swp2 egress" 102 10 |
| check_err $? |
| |
| log_test "fwd mark: forwarding IPv6 packets in hardware" |
| |
| tc filter del dev $swp2 egress protocol ipv6 pref 2 handle 102 flower |
| tc filter del dev $swp2 egress protocol ipv6 pref 1 handle 101 flower |
| tc filter del dev $swp1 ingress protocol ipv6 pref 1 handle 101 flower |
| } |
| |
| setup_prepare() |
| { |
| h1=${NETIFS[p1]} |
| swp1=${NETIFS[p2]} |
| |
| swp2=${NETIFS[p3]} |
| h2=${NETIFS[p4]} |
| |
| vrf_prepare |
| forwarding_enable |
| |
| sysctl_set net.ipv4.conf.all.accept_redirects 0 |
| sysctl_set net.ipv6.conf.all.accept_redirects 0 |
| |
| h1_create |
| h2_create |
| switch_create |
| } |
| |
| cleanup() |
| { |
| pre_cleanup |
| |
| switch_destroy |
| h2_destroy |
| h1_destroy |
| |
| sysctl_restore net.ipv6.conf.all.accept_redirects |
| sysctl_restore net.ipv4.conf.all.accept_redirects |
| |
| forwarding_restore |
| vrf_cleanup |
| } |
| |
| trap cleanup EXIT |
| |
| setup_prepare |
| setup_wait |
| |
| tests_run |
| |
| exit $EXIT_STATUS |
