#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Test devlink-trap L3 drops functionality over mlxsw. Each registered L3 drop
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# packet trap is tested to make sure it is triggered under the right
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# conditions.
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# +---------------------------------+
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# | H1 (vrf) |
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# | + $h1 |
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# | | 192.0.2.1/24 |
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# | | 2001:db8:1::1/64 |
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# | | |
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# | | default via 192.0.2.2 |
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# | | default via 2001:db8:1::2 |
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# +----|----------------------------+
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# |
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# +----|----------------------------------------------------------------------+
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# | SW | |
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# | + $rp1 |
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# | 192.0.2.2/24 |
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# | 2001:db8:1::2/64 |
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# | |
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# | 2001:db8:2::2/64 |
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# | 198.51.100.2/24 |
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# | + $rp2 |
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# | | |
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# +----|----------------------------------------------------------------------+
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# |
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# +----|----------------------------+
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# | | default via 198.51.100.2 |
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# | | default via 2001:db8:2::2 |
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# | | |
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# | | 2001:db8:2::1/64 |
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# | | 198.51.100.1/24 |
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# | + $h2 |
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# | H2 (vrf) |
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# +---------------------------------+
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lib_dir=$(dirname $0)/../../../net/forwarding
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ALL_TESTS="
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non_ip_test
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uc_dip_over_mc_dmac_test
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dip_is_loopback_test
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sip_is_mc_test
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sip_is_loopback_test
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ip_header_corrupted_test
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ipv4_sip_is_limited_bc_test
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ipv6_mc_dip_reserved_scope_test
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ipv6_mc_dip_interface_local_scope_test
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blackhole_route_test
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irif_disabled_test
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erif_disabled_test
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"
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NUM_NETIFS=4
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source $lib_dir/lib.sh
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source $lib_dir/tc_common.sh
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source $lib_dir/devlink_lib.sh
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h1_create()
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{
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simple_if_init $h1 192.0.2.1/24 2001:db8:1::1/64
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ip -4 route add default vrf v$h1 nexthop via 192.0.2.2
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ip -6 route add default vrf v$h1 nexthop via 2001:db8:1::2
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}
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h1_destroy()
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{
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ip -6 route del default vrf v$h1 nexthop via 2001:db8:1::2
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ip -4 route del default vrf v$h1 nexthop via 192.0.2.2
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simple_if_fini $h1 192.0.2.1/24 2001:db8:1::1/64
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}
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h2_create()
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{
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simple_if_init $h2 $h2_ipv4/24 $h2_ipv6/64
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ip -4 route add default vrf v$h2 nexthop via 198.51.100.2
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ip -6 route add default vrf v$h2 nexthop via 2001:db8:2::2
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}
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h2_destroy()
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{
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ip -6 route del default vrf v$h2 nexthop via 2001:db8:2::2
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ip -4 route del default vrf v$h2 nexthop via 198.51.100.2
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simple_if_fini $h2 $h2_ipv4/24 $h2_ipv6/64
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}
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router_create()
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{
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ip link set dev $rp1 up
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ip link set dev $rp2 up
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tc qdisc add dev $rp2 clsact
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__addr_add_del $rp1 add 192.0.2.2/24 2001:db8:1::2/64
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__addr_add_del $rp2 add 198.51.100.2/24 2001:db8:2::2/64
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}
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router_destroy()
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{
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__addr_add_del $rp2 del 198.51.100.2/24 2001:db8:2::2/64
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__addr_add_del $rp1 del 192.0.2.2/24 2001:db8:1::2/64
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tc qdisc del dev $rp2 clsact
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ip link set dev $rp2 down
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ip link set dev $rp1 down
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}
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setup_prepare()
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{
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h1=${NETIFS[p1]}
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rp1=${NETIFS[p2]}
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rp2=${NETIFS[p3]}
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h2=${NETIFS[p4]}
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h1mac=$(mac_get $h1)
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rp1mac=$(mac_get $rp1)
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h1_ipv4=192.0.2.1
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h2_ipv4=198.51.100.1
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h1_ipv6=2001:db8:1::1
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h2_ipv6=2001:db8:2::1
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vrf_prepare
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forwarding_enable
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h1_create
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h2_create
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router_create
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}
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cleanup()
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{
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pre_cleanup
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router_destroy
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h2_destroy
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h1_destroy
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forwarding_restore
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vrf_cleanup
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}
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ping_check()
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{
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trap_name=$1; shift
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devlink_trap_action_set $trap_name "trap"
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ping_do $h1 $h2_ipv4
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check_err $? "Packets that should not be trapped were trapped"
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devlink_trap_action_set $trap_name "drop"
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}
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non_ip_test()
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{
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local trap_name="non_ip"
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local mz_pid
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RET=0
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ping_check $trap_name
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tc filter add dev $rp2 egress protocol ip pref 1 handle 101 \
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flower dst_ip $h2_ipv4 action drop
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# Generate non-IP packets to the router
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$MZ $h1 -c 0 -p 100 -d 1msec -B $h2_ipv4 -q "$rp1mac $h1mac \
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00:00 de:ad:be:ef" &
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mz_pid=$!
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devlink_trap_drop_test $trap_name $rp2 101
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log_test "Non IP"
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devlink_trap_drop_cleanup $mz_pid $rp2 "ip" 1 101
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}
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__uc_dip_over_mc_dmac_test()
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{
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local desc=$1; shift
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local proto=$1; shift
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local dip=$1; shift
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local flags=${1:-""}; shift
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local trap_name="uc_dip_over_mc_dmac"
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local dmac=01:02:03:04:05:06
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local mz_pid
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RET=0
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ping_check $trap_name
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tc filter add dev $rp2 egress protocol $proto pref 1 handle 101 \
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flower ip_proto udp src_port 54321 dst_port 12345 action drop
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# Generate IP packets with a unicast IP and a multicast destination MAC
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$MZ $h1 $flags -t udp "sp=54321,dp=12345" -c 0 -p 100 -b $dmac \
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-B $dip -d 1msec -q &
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mz_pid=$!
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devlink_trap_drop_test $trap_name $rp2 101
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log_test "Unicast destination IP over multicast destination MAC: $desc"
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devlink_trap_drop_cleanup $mz_pid $rp2 $proto 1 101
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}
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uc_dip_over_mc_dmac_test()
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{
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__uc_dip_over_mc_dmac_test "IPv4" "ip" $h2_ipv4
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__uc_dip_over_mc_dmac_test "IPv6" "ipv6" $h2_ipv6 "-6"
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}
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__sip_is_loopback_test()
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{
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local desc=$1; shift
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local proto=$1; shift
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local sip=$1; shift
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local dip=$1; shift
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local flags=${1:-""}; shift
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local trap_name="sip_is_loopback_address"
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local mz_pid
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RET=0
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ping_check $trap_name
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tc filter add dev $rp2 egress protocol $proto pref 1 handle 101 \
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flower src_ip $sip action drop
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# Generate packets with loopback source IP
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$MZ $h1 $flags -t udp "sp=54321,dp=12345" -c 0 -p 100 -A $sip \
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-b $rp1mac -B $dip -d 1msec -q &
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mz_pid=$!
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devlink_trap_drop_test $trap_name $rp2 101
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log_test "Source IP is loopback address: $desc"
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devlink_trap_drop_cleanup $mz_pid $rp2 $proto 1 101
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}
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sip_is_loopback_test()
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{
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__sip_is_loopback_test "IPv4" "ip" "127.0.0.0/8" $h2_ipv4
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__sip_is_loopback_test "IPv6" "ipv6" "::1" $h2_ipv6 "-6"
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}
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__dip_is_loopback_test()
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{
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local desc=$1; shift
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local proto=$1; shift
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local dip=$1; shift
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local flags=${1:-""}; shift
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local trap_name="dip_is_loopback_address"
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local mz_pid
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RET=0
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ping_check $trap_name
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tc filter add dev $rp2 egress protocol $proto pref 1 handle 101 \
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flower dst_ip $dip action drop
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# Generate packets with loopback destination IP
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$MZ $h1 $flags -t udp "sp=54321,dp=12345" -c 0 -p 100 -b $rp1mac \
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-B $dip -d 1msec -q &
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mz_pid=$!
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devlink_trap_drop_test $trap_name $rp2 101
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log_test "Destination IP is loopback address: $desc"
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devlink_trap_drop_cleanup $mz_pid $rp2 $proto 1 101
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}
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dip_is_loopback_test()
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{
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__dip_is_loopback_test "IPv4" "ip" "127.0.0.0/8"
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__dip_is_loopback_test "IPv6" "ipv6" "::1" "-6"
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}
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__sip_is_mc_test()
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{
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local desc=$1; shift
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local proto=$1; shift
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local sip=$1; shift
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local dip=$1; shift
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local flags=${1:-""}; shift
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local trap_name="sip_is_mc"
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local mz_pid
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RET=0
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ping_check $trap_name
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tc filter add dev $rp2 egress protocol $proto pref 1 handle 101 \
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flower src_ip $sip action drop
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# Generate packets with multicast source IP
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$MZ $h1 $flags -t udp "sp=54321,dp=12345" -c 0 -p 100 -A $sip \
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-b $rp1mac -B $dip -d 1msec -q &
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mz_pid=$!
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devlink_trap_drop_test $trap_name $rp2 101
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log_test "Source IP is multicast: $desc"
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devlink_trap_drop_cleanup $mz_pid $rp2 $proto 1 101
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}
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sip_is_mc_test()
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{
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__sip_is_mc_test "IPv4" "ip" "239.1.1.1" $h2_ipv4
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__sip_is_mc_test "IPv6" "ipv6" "FF02::2" $h2_ipv6 "-6"
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}
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ipv4_sip_is_limited_bc_test()
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{
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local trap_name="ipv4_sip_is_limited_bc"
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local sip=255.255.255.255
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local mz_pid
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RET=0
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ping_check $trap_name
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tc filter add dev $rp2 egress protocol ip pref 1 handle 101 \
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flower src_ip $sip action drop
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# Generate packets with limited broadcast source IP
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$MZ $h1 -t udp "sp=54321,dp=12345" -c 0 -p 100 -A $sip -b $rp1mac \
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-B $h2_ipv4 -d 1msec -q &
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mz_pid=$!
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devlink_trap_drop_test $trap_name $rp2 101
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log_test "IPv4 source IP is limited broadcast"
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devlink_trap_drop_cleanup $mz_pid $rp2 "ip" 1 101
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}
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ipv4_payload_get()
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{
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local ipver=$1; shift
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local ihl=$1; shift
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local checksum=$1; shift
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p=$(:
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)"08:00:"$( : ETH type
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)"$ipver"$( : IP version
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)"$ihl:"$( : IHL
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)"00:"$( : IP TOS
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)"00:F4:"$( : IP total length
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)"00:00:"$( : IP identification
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)"20:00:"$( : IP flags + frag off
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)"30:"$( : IP TTL
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)"01:"$( : IP proto
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)"$checksum:"$( : IP header csum
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)"$h1_ipv4:"$( : IP saddr
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)"$h2_ipv4:"$( : IP daddr
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)
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echo $p
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}
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__ipv4_header_corrupted_test()
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{
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local desc=$1; shift
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local ipver=$1; shift
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local ihl=$1; shift
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local checksum=$1; shift
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local trap_name="ip_header_corrupted"
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local payload
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local mz_pid
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RET=0
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ping_check $trap_name
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tc filter add dev $rp2 egress protocol ip pref 1 handle 101 \
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flower dst_ip $h2_ipv4 action drop
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payload=$(ipv4_payload_get $ipver $ihl $checksum)
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# Generate packets with corrupted IP header
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$MZ $h1 -c 0 -d 1msec -a $h1mac -b $rp1mac -q p=$payload &
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mz_pid=$!
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devlink_trap_drop_test $trap_name $rp2 101
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log_test "IP header corrupted: $desc: IPv4"
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devlink_trap_drop_cleanup $mz_pid $rp2 "ip" 1 101
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}
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ipv6_payload_get()
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{
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local ipver=$1; shift
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p=$(:
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)"86:DD:"$( : ETH type
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)"$ipver"$( : IP version
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)"0:0:"$( : Traffic class
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)"0:00:00:"$( : Flow label
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)"00:00:"$( : Payload length
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)"01:"$( : Next header
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)"04:"$( : Hop limit
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)"$h1_ipv6:"$( : IP saddr
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)"$h2_ipv6:"$( : IP daddr
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)
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echo $p
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}
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__ipv6_header_corrupted_test()
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{
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local desc=$1; shift
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local ipver=$1; shift
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local trap_name="ip_header_corrupted"
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local payload
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local mz_pid
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RET=0
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ping_check $trap_name
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tc filter add dev $rp2 egress protocol ip pref 1 handle 101 \
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flower dst_ip $h2_ipv4 action drop
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payload=$(ipv6_payload_get $ipver)
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# Generate packets with corrupted IP header
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$MZ $h1 -c 0 -d 1msec -a $h1mac -b $rp1mac -q p=$payload &
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mz_pid=$!
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devlink_trap_drop_test $trap_name $rp2 101
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log_test "IP header corrupted: $desc: IPv6"
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devlink_trap_drop_cleanup $mz_pid $rp2 "ip" 1 101
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}
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ip_header_corrupted_test()
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{
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# Each test uses one wrong value. The three values below are correct.
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local ipv="4"
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local ihl="5"
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local checksum="00:F4"
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__ipv4_header_corrupted_test "wrong IP version" 5 $ihl $checksum
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__ipv4_header_corrupted_test "wrong IHL" $ipv 4 $checksum
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__ipv4_header_corrupted_test "wrong checksum" $ipv $ihl "00:00"
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__ipv6_header_corrupted_test "wrong IP version" 5
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}
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ipv6_mc_dip_reserved_scope_test()
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{
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local trap_name="ipv6_mc_dip_reserved_scope"
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local dip=FF00::
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local mz_pid
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RET=0
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ping_check $trap_name
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tc filter add dev $rp2 egress protocol ipv6 pref 1 handle 101 \
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flower dst_ip $dip action drop
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# Generate packets with reserved scope destination IP
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$MZ $h1 -6 -t udp "sp=54321,dp=12345" -c 0 -p 100 -b \
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"33:33:00:00:00:00" -B $dip -d 1msec -q &
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mz_pid=$!
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devlink_trap_drop_test $trap_name $rp2 101
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log_test "IPv6 multicast destination IP reserved scope"
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devlink_trap_drop_cleanup $mz_pid $rp2 "ipv6" 1 101
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}
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ipv6_mc_dip_interface_local_scope_test()
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{
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local trap_name="ipv6_mc_dip_interface_local_scope"
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local dip=FF01::
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local mz_pid
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RET=0
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ping_check $trap_name
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tc filter add dev $rp2 egress protocol ipv6 pref 1 handle 101 \
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flower dst_ip $dip action drop
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# Generate packets with interface local scope destination IP
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$MZ $h1 -6 -t udp "sp=54321,dp=12345" -c 0 -p 100 -b \
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"33:33:00:00:00:00" -B $dip -d 1msec -q &
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mz_pid=$!
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devlink_trap_drop_test $trap_name $rp2 101
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log_test "IPv6 multicast destination IP interface-local scope"
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devlink_trap_drop_cleanup $mz_pid $rp2 "ipv6" 1 101
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}
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__blackhole_route_test()
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{
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local flags=$1; shift
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local subnet=$1; shift
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local proto=$1; shift
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local dip=$1; shift
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local ip_proto=${1:-"icmp"}; shift
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local trap_name="blackhole_route"
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local mz_pid
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RET=0
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ping_check $trap_name
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ip -$flags route add blackhole $subnet
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tc filter add dev $rp2 egress protocol $proto pref 1 handle 101 \
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flower skip_hw dst_ip $dip ip_proto $ip_proto action drop
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# Generate packets to the blackhole route
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$MZ $h1 -$flags -t udp "sp=54321,dp=12345" -c 0 -p 100 -b $rp1mac \
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-B $dip -d 1msec -q &
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mz_pid=$!
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devlink_trap_drop_test $trap_name $rp2 101
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log_test "Blackhole route: IPv$flags"
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devlink_trap_drop_cleanup $mz_pid $rp2 $proto 1 101
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ip -$flags route del blackhole $subnet
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}
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blackhole_route_test()
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{
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__blackhole_route_test "4" "198.51.100.0/30" "ip" $h2_ipv4
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__blackhole_route_test "6" "2001:db8:2::/120" "ipv6" $h2_ipv6 "icmpv6"
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}
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irif_disabled_test()
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{
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local trap_name="irif_disabled"
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local t0_packets t0_bytes
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local t1_packets t1_bytes
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local mz_pid
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RET=0
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ping_check $trap_name
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devlink_trap_action_set $trap_name "trap"
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# When RIF of a physical port ("Sub-port RIF") is destroyed, we first
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# block the STP of the {Port, VLAN} so packets cannot get into the RIF.
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# Using bridge enables us to see this trap because when bridge is
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# destroyed, there is a small time window that packets can go into the
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# RIF, while it is disabled.
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ip link add dev br0 type bridge
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ip link set dev $rp1 master br0
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ip address flush dev $rp1
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__addr_add_del br0 add 192.0.2.2/24
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ip li set dev br0 up
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t0_packets=$(devlink_trap_rx_packets_get $trap_name)
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t0_bytes=$(devlink_trap_rx_bytes_get $trap_name)
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# Generate packets to h2 through br0 RIF that will be removed later
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$MZ $h1 -t udp "sp=54321,dp=12345" -c 0 -p 100 -a own -b $rp1mac \
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-B $h2_ipv4 -q &
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mz_pid=$!
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# Wait before removing br0 RIF to allow packets to go into the bridge.
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sleep 1
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# Flushing address will dismantle the RIF
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ip address flush dev br0
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t1_packets=$(devlink_trap_rx_packets_get $trap_name)
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t1_bytes=$(devlink_trap_rx_bytes_get $trap_name)
|
|
if [[ $t0_packets -eq $t1_packets && $t0_bytes -eq $t1_bytes ]]; then
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check_err 1 "Trap stats idle when packets should be trapped"
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fi
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log_test "Ingress RIF disabled"
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|
kill $mz_pid && wait $mz_pid &> /dev/null
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ip link set dev $rp1 nomaster
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__addr_add_del $rp1 add 192.0.2.2/24 2001:db8:1::2/64
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ip link del dev br0 type bridge
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devlink_trap_action_set $trap_name "drop"
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}
|
|
erif_disabled_test()
|
{
|
local trap_name="erif_disabled"
|
local t0_packets t0_bytes
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local t1_packets t1_bytes
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local mz_pid
|
|
RET=0
|
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ping_check $trap_name
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devlink_trap_action_set $trap_name "trap"
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ip link add dev br0 type bridge
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ip add flush dev $rp1
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ip link set dev $rp1 master br0
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__addr_add_del br0 add 192.0.2.2/24
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ip link set dev br0 up
|
|
t0_packets=$(devlink_trap_rx_packets_get $trap_name)
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t0_bytes=$(devlink_trap_rx_bytes_get $trap_name)
|
|
rp2mac=$(mac_get $rp2)
|
|
# Generate packets that should go out through br0 RIF that will be
|
# removed later
|
$MZ $h2 -t udp "sp=54321,dp=12345" -c 0 -p 100 -a own -b $rp2mac \
|
-B 192.0.2.1 -q &
|
mz_pid=$!
|
|
sleep 5
|
# Unlinking the port from the bridge will disable the RIF associated
|
# with br0 as it is no longer an upper of any mlxsw port.
|
ip link set dev $rp1 nomaster
|
|
t1_packets=$(devlink_trap_rx_packets_get $trap_name)
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t1_bytes=$(devlink_trap_rx_bytes_get $trap_name)
|
|
if [[ $t0_packets -eq $t1_packets && $t0_bytes -eq $t1_bytes ]]; then
|
check_err 1 "Trap stats idle when packets should be trapped"
|
fi
|
|
log_test "Egress RIF disabled"
|
|
kill $mz_pid && wait $mz_pid &> /dev/null
|
__addr_add_del $rp1 add 192.0.2.2/24 2001:db8:1::2/64
|
ip link del dev br0 type bridge
|
devlink_trap_action_set $trap_name "drop"
|
}
|
|
trap cleanup EXIT
|
|
setup_prepare
|
setup_wait
|
|
tests_run
|
|
exit $EXIT_STATUS
|
