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 ip address add 127.25.3.4/24 dev veth0 22 ip link set dev veth0 up 23 ip netns exec "${PEER_NS}" ip address add 127.25.3.14/24 dev veth1 24 ip netns exec "${PEER_NS}" ip link set dev veth1 up 25 26 ip route flush cache 27 ip netns exec "${PEER_NS}" ip route flush cache 28} 29 30cleanup() { 31 ip link del veth0 32 ip route add local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1 33 local -r ns="$(ip netns list|grep $PEER_NS)" 34 [ -n "$ns" ] && ip netns del $ns 2>/dev/null 35} 36 37# Run test when arp_announce = 2. 38run_arp_announce_test() { 39 echo "run arp_announce test" 40 setup 41 42 sysctl -w net.ipv4.conf.veth0.arp_announce=2 43 ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.arp_announce=2 44 ping -c5 -I veth0 127.25.3.14 45 if [ $? -ne 0 ];then 46 echo "failed" 47 else 48 echo "ok" 49 fi 50 51 cleanup 52} 53 54# Run test when arp_ignore = 3. 55run_arp_ignore_test() { 56 echo "run arp_ignore test" 57 setup 58 59 sysctl -w net.ipv4.conf.veth0.arp_ignore=3 60 ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.arp_ignore=3 61 ping -c5 -I veth0 127.25.3.14 62 if [ $? -ne 0 ];then 63 echo "failed" 64 else 65 echo "ok" 66 fi 67 68 cleanup 69} 70 71run_all_tests() { 72 run_arp_announce_test 73 run_arp_ignore_test 74} 75 76run_all_tests 77