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Commit 40f98b9a authored by Xin Long's avatar Xin Long Committed by David S. Miller
Browse files

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: default avatarXin Long <lucien.xin@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5cbf777c

tools/testing/selftests/net/forwarding/router_broadcast.sh

0 → 100755
+233 −0
Original line number Diff line number Diff line 
#!/bin/bash

# SPDX-License-Identifier: GPL-2.0



ALL_TESTS="ping_ipv4"

NUM_NETIFS=6

source lib.sh



h1_create()

{

	vrf_create "vrf-h1"

	ip link set dev $h1 master vrf-h1



	ip link set dev vrf-h1 up

	ip link set dev $h1 up



	ip address add 192.0.2.2/24 dev $h1



	ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1

	ip route add 198.51.200.0/24 vrf vrf-h1 nexthop via 192.0.2.1

}



h1_destroy()

{

	ip route del 198.51.200.0/24 vrf vrf-h1

	ip route del 198.51.100.0/24 vrf vrf-h1



	ip address del 192.0.2.2/24 dev $h1



	ip link set dev $h1 down

	vrf_destroy "vrf-h1"

}



h2_create()

{

	vrf_create "vrf-h2"

	ip link set dev $h2 master vrf-h2



	ip link set dev vrf-h2 up

	ip link set dev $h2 up



	ip address add 198.51.100.2/24 dev $h2



	ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1

	ip route add 198.51.200.0/24 vrf vrf-h2 nexthop via 198.51.100.1

}



h2_destroy()

{

	ip route del 198.51.200.0/24 vrf vrf-h2

	ip route del 192.0.2.0/24 vrf vrf-h2



	ip address del 198.51.100.2/24 dev $h2



	ip link set dev $h2 down

	vrf_destroy "vrf-h2"

}



h3_create()

{

	vrf_create "vrf-h3"

	ip link set dev $h3 master vrf-h3



	ip link set dev vrf-h3 up

	ip link set dev $h3 up



	ip address add 198.51.200.2/24 dev $h3



	ip route add 192.0.2.0/24 vrf vrf-h3 nexthop via 198.51.200.1

	ip route add 198.51.100.0/24 vrf vrf-h3 nexthop via 198.51.200.1

}



h3_destroy()

{

	ip route del 198.51.100.0/24 vrf vrf-h3

	ip route del 192.0.2.0/24 vrf vrf-h3



	ip address del 198.51.200.2/24 dev $h3



	ip link set dev $h3 down

	vrf_destroy "vrf-h3"

}



router_create()

{

	ip link set dev $rp1 up

	ip link set dev $rp2 up

	ip link set dev $rp3 up



	ip address add 192.0.2.1/24 dev $rp1



	ip address add 198.51.100.1/24 dev $rp2

	ip address add 198.51.200.1/24 dev $rp3

}



router_destroy()

{

	ip address del 198.51.200.1/24 dev $rp3

	ip address del 198.51.100.1/24 dev $rp2



	ip address del 192.0.2.1/24 dev $rp1



	ip link set dev $rp3 down

	ip link set dev $rp2 down

	ip link set dev $rp1 down

}



setup_prepare()

{

	h1=${NETIFS[p1]}

	rp1=${NETIFS[p2]}



	rp2=${NETIFS[p3]}

	h2=${NETIFS[p4]}



	rp3=${NETIFS[p5]}

	h3=${NETIFS[p6]}



	vrf_prepare



	h1_create

	h2_create

	h3_create



	router_create



	forwarding_enable

}



cleanup()

{

	pre_cleanup



	forwarding_restore



	router_destroy



	h3_destroy

	h2_destroy

	h1_destroy



	vrf_cleanup

}



bc_forwarding_disable()

{

	sysctl_set net.ipv4.conf.all.bc_forwarding 0

	sysctl_set net.ipv4.conf.$rp1.bc_forwarding 0

}



bc_forwarding_enable()

{

	sysctl_set net.ipv4.conf.all.bc_forwarding 1

	sysctl_set net.ipv4.conf.$rp1.bc_forwarding 1

}



bc_forwarding_restore()

{

	sysctl_restore net.ipv4.conf.$rp1.bc_forwarding

	sysctl_restore net.ipv4.conf.all.bc_forwarding

}



ping_test_from()

{

	local oif=$1

	local dip=$2

	local from=$3

	local fail=${4:-0}



	RET=0



	log_info "ping $dip, expected reply from $from"

	ip vrf exec $(master_name_get $oif) \

	$PING -I $oif $dip -c 10 -i 0.1 -w 2 -b 2>&1 | grep $from &> /dev/null

	check_err_fail $fail $?

}



ping_ipv4()

{

	sysctl_set net.ipv4.icmp_echo_ignore_broadcasts 0



	bc_forwarding_disable

	log_info "bc_forwarding disabled on r1 =>"

	ping_test_from $h1 198.51.100.255 192.0.2.1

	log_test "h1 -> net2: reply from r1 (not forwarding)"

	ping_test_from $h1 198.51.200.255 192.0.2.1

	log_test "h1 -> net3: reply from r1 (not forwarding)"

	ping_test_from $h1 192.0.2.255 192.0.2.1

	log_test "h1 -> net1: reply from r1 (not dropping)"

	ping_test_from $h1 255.255.255.255 192.0.2.1

	log_test "h1 -> 255.255.255.255: reply from r1 (not forwarding)"



	ping_test_from $h2 192.0.2.255 198.51.100.1

	log_test "h2 -> net1: reply from r1 (not forwarding)"

	ping_test_from $h2 198.51.200.255 198.51.100.1

	log_test "h2 -> net3: reply from r1 (not forwarding)"

	ping_test_from $h2 198.51.100.255 198.51.100.1

	log_test "h2 -> net2: reply from r1 (not dropping)"

	ping_test_from $h2 255.255.255.255 198.51.100.1

	log_test "h2 -> 255.255.255.255: reply from r1 (not forwarding)"

	bc_forwarding_restore



	bc_forwarding_enable

	log_info "bc_forwarding enabled on r1 =>"

	ping_test_from $h1 198.51.100.255 198.51.100.2

	log_test "h1 -> net2: reply from h2 (forwarding)"

	ping_test_from $h1 198.51.200.255 198.51.200.2

	log_test "h1 -> net3: reply from h3 (forwarding)"

	ping_test_from $h1 192.0.2.255 192.0.2.1 1

	log_test "h1 -> net1: no reply (dropping)"

	ping_test_from $h1 255.255.255.255 192.0.2.1

	log_test "h1 -> 255.255.255.255: reply from r1 (not forwarding)"



	ping_test_from $h2 192.0.2.255 192.0.2.2

	log_test "h2 -> net1: reply from h1 (forwarding)"

	ping_test_from $h2 198.51.200.255 198.51.200.2

	log_test "h2 -> net3: reply from h3 (forwarding)"

	ping_test_from $h2 198.51.100.255 198.51.100.1 1

	log_test "h2 -> net2: no reply (dropping)"

	ping_test_from $h2 255.255.255.255 198.51.100.1

	log_test "h2 -> 255.255.255.255: reply from r1 (not forwarding)"

	bc_forwarding_restore



	sysctl_restore net.ipv4.icmp_echo_ignore_broadcasts

}



trap cleanup EXIT



setup_prepare

setup_wait



tests_run



exit $EXIT_STATUS