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selftests: add a selftest for directed broadcast forwarding
As Ido's suggestion, this patch is to add a selftest for directed broadcast forwarding with vrf. It does the assertion by checking the src IP of the echo-reply packet in ping_test_from. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long
David S. Miller
parent
5cbf777cfd
commit
40f98b9af9
233
tools/testing/selftests/net/forwarding/router_broadcast.sh
Executable file
233
tools/testing/selftests/net/forwarding/router_broadcast.sh
Executable file
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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ALL_TESTS="ping_ipv4"
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NUM_NETIFS=6
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source lib.sh
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h1_create()
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{
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vrf_create "vrf-h1"
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ip link set dev $h1 master vrf-h1
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ip link set dev vrf-h1 up
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ip link set dev $h1 up
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ip address add 192.0.2.2/24 dev $h1
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ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1
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ip route add 198.51.200.0/24 vrf vrf-h1 nexthop via 192.0.2.1
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}
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h1_destroy()
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{
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ip route del 198.51.200.0/24 vrf vrf-h1
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ip route del 198.51.100.0/24 vrf vrf-h1
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ip address del 192.0.2.2/24 dev $h1
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ip link set dev $h1 down
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vrf_destroy "vrf-h1"
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}
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h2_create()
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{
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vrf_create "vrf-h2"
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ip link set dev $h2 master vrf-h2
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ip link set dev vrf-h2 up
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ip link set dev $h2 up
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ip address add 198.51.100.2/24 dev $h2
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ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1
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ip route add 198.51.200.0/24 vrf vrf-h2 nexthop via 198.51.100.1
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}
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h2_destroy()
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{
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ip route del 198.51.200.0/24 vrf vrf-h2
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ip route del 192.0.2.0/24 vrf vrf-h2
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ip address del 198.51.100.2/24 dev $h2
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ip link set dev $h2 down
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vrf_destroy "vrf-h2"
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}
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h3_create()
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{
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vrf_create "vrf-h3"
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ip link set dev $h3 master vrf-h3
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ip link set dev vrf-h3 up
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ip link set dev $h3 up
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ip address add 198.51.200.2/24 dev $h3
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ip route add 192.0.2.0/24 vrf vrf-h3 nexthop via 198.51.200.1
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ip route add 198.51.100.0/24 vrf vrf-h3 nexthop via 198.51.200.1
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}
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h3_destroy()
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{
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ip route del 198.51.100.0/24 vrf vrf-h3
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ip route del 192.0.2.0/24 vrf vrf-h3
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ip address del 198.51.200.2/24 dev $h3
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ip link set dev $h3 down
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vrf_destroy "vrf-h3"
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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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ip link set dev $rp3 up
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ip address add 192.0.2.1/24 dev $rp1
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ip address add 198.51.100.1/24 dev $rp2
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ip address add 198.51.200.1/24 dev $rp3
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}
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router_destroy()
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{
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ip address del 198.51.200.1/24 dev $rp3
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ip address del 198.51.100.1/24 dev $rp2
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ip address del 192.0.2.1/24 dev $rp1
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ip link set dev $rp3 down
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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=${NETIFS[p4]}
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rp3=${NETIFS[p5]}
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h3=${NETIFS[p6]}
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vrf_prepare
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h1_create
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h2_create
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h3_create
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router_create
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forwarding_enable
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}
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cleanup()
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{
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pre_cleanup
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forwarding_restore
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router_destroy
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h3_destroy
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h2_destroy
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h1_destroy
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vrf_cleanup
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}
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bc_forwarding_disable()
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{
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sysctl_set net.ipv4.conf.all.bc_forwarding 0
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sysctl_set net.ipv4.conf.$rp1.bc_forwarding 0
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}
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bc_forwarding_enable()
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{
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sysctl_set net.ipv4.conf.all.bc_forwarding 1
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sysctl_set net.ipv4.conf.$rp1.bc_forwarding 1
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}
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bc_forwarding_restore()
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{
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sysctl_restore net.ipv4.conf.$rp1.bc_forwarding
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sysctl_restore net.ipv4.conf.all.bc_forwarding
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}
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ping_test_from()
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{
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local oif=$1
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local dip=$2
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local from=$3
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local fail=${4:-0}
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RET=0
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log_info "ping $dip, expected reply from $from"
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ip vrf exec $(master_name_get $oif) \
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$PING -I $oif $dip -c 10 -i 0.1 -w 2 -b 2>&1 | grep $from &> /dev/null
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check_err_fail $fail $?
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}
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ping_ipv4()
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{
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sysctl_set net.ipv4.icmp_echo_ignore_broadcasts 0
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bc_forwarding_disable
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log_info "bc_forwarding disabled on r1 =>"
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ping_test_from $h1 198.51.100.255 192.0.2.1
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log_test "h1 -> net2: reply from r1 (not forwarding)"
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ping_test_from $h1 198.51.200.255 192.0.2.1
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log_test "h1 -> net3: reply from r1 (not forwarding)"
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ping_test_from $h1 192.0.2.255 192.0.2.1
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log_test "h1 -> net1: reply from r1 (not dropping)"
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ping_test_from $h1 255.255.255.255 192.0.2.1
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log_test "h1 -> 255.255.255.255: reply from r1 (not forwarding)"
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ping_test_from $h2 192.0.2.255 198.51.100.1
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log_test "h2 -> net1: reply from r1 (not forwarding)"
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ping_test_from $h2 198.51.200.255 198.51.100.1
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log_test "h2 -> net3: reply from r1 (not forwarding)"
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ping_test_from $h2 198.51.100.255 198.51.100.1
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log_test "h2 -> net2: reply from r1 (not dropping)"
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ping_test_from $h2 255.255.255.255 198.51.100.1
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log_test "h2 -> 255.255.255.255: reply from r1 (not forwarding)"
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bc_forwarding_restore
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bc_forwarding_enable
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log_info "bc_forwarding enabled on r1 =>"
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ping_test_from $h1 198.51.100.255 198.51.100.2
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log_test "h1 -> net2: reply from h2 (forwarding)"
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ping_test_from $h1 198.51.200.255 198.51.200.2
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log_test "h1 -> net3: reply from h3 (forwarding)"
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ping_test_from $h1 192.0.2.255 192.0.2.1 1
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log_test "h1 -> net1: no reply (dropping)"
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ping_test_from $h1 255.255.255.255 192.0.2.1
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log_test "h1 -> 255.255.255.255: reply from r1 (not forwarding)"
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ping_test_from $h2 192.0.2.255 192.0.2.2
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log_test "h2 -> net1: reply from h1 (forwarding)"
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ping_test_from $h2 198.51.200.255 198.51.200.2
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log_test "h2 -> net3: reply from h3 (forwarding)"
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ping_test_from $h2 198.51.100.255 198.51.100.1 1
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log_test "h2 -> net2: no reply (dropping)"
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ping_test_from $h2 255.255.255.255 198.51.100.1
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log_test "h2 -> 255.255.255.255: reply from r1 (not forwarding)"
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bc_forwarding_restore
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sysctl_restore net.ipv4.icmp_echo_ignore_broadcasts
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}
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trap cleanup EXIT
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setup_prepare
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setup_wait
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tests_run
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exit $EXIT_STATUS
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