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
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