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selftests: forwarding: router: Add test case for source IP equals destination IP

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Add test case to check that packets are not dropped when they need to be
routed and their source IP equals to their destination IP.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amit Cohen 2020-01-05 18:20:55 +02:00 committed by David S. Miller
parent e317b0f77e
commit 6e734f863c
1 changed files with 44 additions and 0 deletions
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44
tools/testing/selftests/net/forwarding/router.sh
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@ -6,6 +6,8 @@ ALL_TESTS="
ping_ipv6
sip_in_class_e
mc_mac_mismatch
ipv4_sip_equal_dip
ipv6_sip_equal_dip
"
NUM_NETIFS=4
@ -243,6 +245,48 @@ mc_mac_mismatch()
__mc_mac_mismatch "IPv6" "ipv6" 2001:db8:1::2 ff0e::3 "-6"
}
ipv4_sip_equal_dip()
{
RET=0
# Disable rpfilter to prevent packets to be dropped because of it.
sysctl_set net.ipv4.conf.all.rp_filter 0
sysctl_set net.ipv4.conf.$rp1.rp_filter 0
tc filter add dev $rp2 egress protocol ip pref 1 handle 101 \
flower src_ip 198.51.100.2 action pass
$MZ $h1 -t udp "sp=54321,dp=12345" -c 5 -d 1msec \
-A 198.51.100.2 -b $rp1mac -B 198.51.100.2 -q
tc_check_packets "dev $rp2 egress" 101 5
check_err $? "Packets were dropped"
log_test "Source IP is equal to destination IP: IPv4"
tc filter del dev $rp2 egress protocol ip pref 1 handle 101 flower
sysctl_restore net.ipv4.conf.$rp1.rp_filter
sysctl_restore net.ipv4.conf.all.rp_filter
}
ipv6_sip_equal_dip()
{
RET=0
tc filter add dev $rp2 egress protocol ipv6 pref 1 handle 101 \
flower src_ip 2001:db8:2::2 action pass
$MZ -6 $h1 -t udp "sp=54321,dp=12345" -c 5 -d 1msec \
-A 2001:db8:2::2 -b $rp1mac -B 2001:db8:2::2 -q
tc_check_packets "dev $rp2 egress" 101 5
check_err $? "Packets were dropped"
log_test "Source IP is equal to destination IP: IPv6"
tc filter del dev $rp2 egress protocol ipv6 pref 1 handle 101 flower
}
trap cleanup EXIT
setup_prepare