tools/testing/selftests/net/route_localnet.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Run a couple of tests when route_localnet = 1.
   5
   6 readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)"
   7
   8 setup() {
   9     ip netns add "${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 "${PEER_NS}" ip route flush cache
  28 }
  29
  30 cleanup() {
  31     ip link del veth0
  32     ip route add local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1
  33     local -r ns="$(ip netns list|grep $PEER_NS)"
  34     [ -n "$ns" ] && ip netns del $ns 2>/dev/null
  35 }
  36
  37 # Run test when arp_announce = 2.
  38 run_arp_announce_test() {
  39     echo "run arp_announce test"
  40     setup
  41
  42     sysctl -w net.ipv4.conf.veth0.arp_announce=2
  43     ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.arp_announce=2
  44     ping -c5 -I veth0 127.25.3.14
  45     if [ $? -ne 0 ];then
  46         echo "failed"
  47     else
  48         echo "ok"
  49     fi
  50
  51     cleanup
  52 }
  53
  54 # Run test when arp_ignore = 3.
  55 run_arp_ignore_test() {
  56     echo "run arp_ignore test"
  57     setup
  58
  59     sysctl -w net.ipv4.conf.veth0.arp_ignore=3
  60     ip netns exec "${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
  71 run_all_tests() {
  72     run_arp_announce_test
  73     run_arp_ignore_test
  74 }
  75
  76 run_all_tests