1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# 4# Run a couple of tests when route_localnet = 1. 5 6readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)" 7 8setup() { 9 ip netns add "${PEER_NS}" 10 ip -netns "${PEER_NS}" link set dev lo up 11 ip link add name veth0 type veth peer name veth1 12 ip link set dev veth0 up 13 ip link set dev veth1 netns "${PEER_NS}" 14 15 # Enable route_localnet and delete useless route 127.0.0.0/8. 16 sysctl -w net.ipv4.conf.veth0.route_localnet=1 17 ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.route_localnet=1 18 ip route del 127.0.0.0/8 dev lo table local 19 ip netns exec "${PEER_NS}" ip route del 127.0.0.0/8 dev lo table local 20 21 ifconfig veth0 127.25.3.4/24 up 22 ip netns exec "${PEER_NS}" ifconfig veth1 127.25.3.14/24 up 23 24 ip route flush cache 25 ip netns exec "${PEER_NS}" ip route flush cache 26} 27 28cleanup() { 29 ip link del veth0 30 ip route add local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1 31 local -r ns="$(ip netns list|grep $PEER_NS)" 32 [ -n "$ns" ] && ip netns del $ns 2>/dev/null 33} 34 35# Run test when arp_announce = 2. 36run_arp_announce_test() { 37 echo "run arp_announce test" 38 setup 39 40 sysctl -w net.ipv4.conf.veth0.arp_announce=2 41 ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.arp_announce=2 42 ping -c5 -I veth0 127.25.3.14 43 if [ $? -ne 0 ];then 44 echo "failed" 45 else 46 echo "ok" 47 fi 48 49 cleanup 50} 51 52# Run test when arp_ignore = 3. 53run_arp_ignore_test() { 54 echo "run arp_ignore test" 55 setup 56 57 sysctl -w net.ipv4.conf.veth0.arp_ignore=3 58 ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.arp_ignore=3 59 ping -c5 -I veth0 127.25.3.14 60 if [ $? -ne 0 ];then 61 echo "failed" 62 else 63 echo "ok" 64 fi 65 66 cleanup 67} 68 69run_all_tests() { 70 run_arp_announce_test 71 run_arp_ignore_test 72} 73 74run_all_tests 75