selftests/net/route_localnet.sh

2 # SPDX-License-Identifier: GPL-2.0
6 readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)"
10     ip -netns "${PEER_NS}" link set dev lo up
12     ip link set dev veth0 up
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
22     ip link set dev veth0 up
24     ip netns exec "${PEER_NS}" ip link set dev veth1 up
26     ip route flush cache
27     ip netns exec "${PEER_NS}" ip route flush cache
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 $ns 2>/dev/null
42     sysctl -w net.ipv4.conf.veth0.arp_announce=2
43     ip netns exec "${PEER_NS}" sysctl -w net.ipv4.conf.veth1.arp_announce=2
44     ping -c5 -I veth0 127.25.3.14
45     if [ $? -ne 0 ];then
59     sysctl -w net.ipv4.conf.veth0.arp_ignore=3
60     ip netns exec "${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