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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Run a couple of tests when route_localnet = 1.
readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)"
setup() {
ip netns add "${PEER_NS}"
ip -netns "${PEER_NS}" link set dev lo up
ip link add name veth0 type veth peer name veth1
ip link set dev veth0 up
ip link set dev veth1 netns "${PEER_NS}"
# Enable route_localnet and delete useless route 127.0.0.0/8.
sysctl -w net.ipv4.conf.veth0.route_localnet=1
ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.route_localnet=1
ip route del 127.0.0.0/8 dev lo table local
ip netns exec "${PEER_NS}" ip route del 127.0.0.0/8 dev lo table local
ip address add 127.25.3.4/24 dev veth0
ip link set dev veth0 up
ip netns exec "${PEER_NS}" ip address add 127.25.3.14/24 dev veth1
ip netns exec "${PEER_NS}" ip link set dev veth1 up
ip route flush cache
ip netns exec "${PEER_NS}" ip route flush cache
}
cleanup() {
ip link del veth0
ip route add local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1
local -r ns="$(ip netns list|grep $PEER_NS)"
[ -n "$ns" ] && ip netns del $ns 2>/dev/null
}
# Run test when arp_announce = 2.
run_arp_announce_test() {
echo "run arp_announce test"
setup
sysctl -w net.ipv4.conf.veth0.arp_announce=2
ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.arp_announce=2
ping -c5 -I veth0 127.25.3.14
if [ $? -ne 0 ];then
echo "failed"
else
echo "ok"
fi
cleanup
}
# Run test when arp_ignore = 3.
run_arp_ignore_test() {
echo "run arp_ignore test"
setup
sysctl -w net.ipv4.conf.veth0.arp_ignore=3
ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.arp_ignore=3
ping -c5 -I veth0 127.25.3.14
if [ $? -ne 0 ];then
echo "failed"
else
echo "ok"
fi
cleanup
}
run_all_tests() {
run_arp_announce_test
run_arp_ignore_test
}
run_all_tests
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