selftests/net/route_localnet.sh

0001 #!/bin/bash
0002 # SPDX-License-Identifier: GPL-2.0
0003 #
0004 # Run a couple of tests when route_localnet = 1.
0005
0006 readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)"
0007
0008 setup() {
0009     ip netns add "${PEER_NS}"
0010     ip -netns "${PEER_NS}" link set dev lo up
0011     ip link add name veth0 type veth peer name veth1
0012     ip link set dev veth0 up
0013     ip link set dev veth1 netns "${PEER_NS}"
0014
0015     # Enable route_localnet and delete useless route 127.0.0.0/8.
0016     sysctl -w net.ipv4.conf.veth0.route_localnet=1
0017     ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.route_localnet=1
0018     ip route del 127.0.0.0/8 dev lo table local
0019     ip netns exec "${PEER_NS}" ip route del 127.0.0.0/8 dev lo table local
0020
0021     ifconfig veth0 127.25.3.4/24 up
0022     ip netns exec "${PEER_NS}" ifconfig veth1 127.25.3.14/24 up
0023
0024     ip route flush cache
0025     ip netns exec "${PEER_NS}" ip route flush cache
0026 }
0027
0028 cleanup() {
0029     ip link del veth0
0030     ip route add local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1
0031     local -r ns="$(ip netns list|grep $PEER_NS)"
0032     [ -n "$ns" ] && ip netns del $ns 2>/dev/null
0033 }
0034
0035 # Run test when arp_announce = 2.
0036 run_arp_announce_test() {
0037     echo "run arp_announce test"
0038     setup
0039
0040     sysctl -w net.ipv4.conf.veth0.arp_announce=2
0041     ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.arp_announce=2
0042     ping -c5 -I veth0 127.25.3.14
0043     if [ $? -ne 0 ];then
0044         echo "failed"
0045     else
0046         echo "ok"
0047     fi
0048
0049     cleanup
0050 }
0051
0052 # Run test when arp_ignore = 3.
0053 run_arp_ignore_test() {
0054     echo "run arp_ignore test"
0055     setup
0056
0057     sysctl -w net.ipv4.conf.veth0.arp_ignore=3
0058     ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.arp_ignore=3
0059     ping -c5 -I veth0 127.25.3.14
0060     if [ $? -ne 0 ];then
0061         echo "failed"
0062     else
0063         echo "ok"
0064     fi
0065
0066     cleanup
0067 }
0068
0069 run_all_tests() {
0070     run_arp_announce_test
0071     run_arp_ignore_test
0072 }
0073
0074 run_all_tests