#!/bin/bash # SPDX-License-Identifier: GPL-2.0 # In Namespace 0 (at_ns0) using native tunnel # Overlay IP: 10.1.1.100 # local 192.16.1.100 remote 192.16.1.200 # veth0 IP: 172.16.1.100, tunnel dev 00 # Out of Namespace using BPF set/get on lwtunnel # Overlay IP: 10.1.1.200 # local 172.16.1.200 remote 172.16.1.100 # veth1 IP: 172.16.1.200, tunnel dev 11 function config_device { ip netns add at_ns0 ip link add veth0 type veth peer name veth1 ip link set veth0 netns at_ns0 ip netns exec at_ns0 ip addr add 172.16.1.100/24 dev veth0 ip netns exec at_ns0 ip link set dev veth0 up ip link set dev veth1 up mtu 1500 ip addr add dev veth1 172.16.1.200/24 } function add_gre_tunnel { # in namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq key 2 \ local 172.16.1.100 remote 172.16.1.200 ip netns exec at_ns0 ip link set dev $DEV_NS up ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 # out of namespace ip link add dev $DEV type $TYPE key 2 external ip link set dev $DEV up ip addr add dev $DEV 10.1.1.200/24 } function add_ip6gretap_tunnel { # assign ipv6 address ip netns exec at_ns0 ip addr add ::11/96 dev veth0 ip netns exec at_ns0 ip link set dev veth0 up ip addr add dev veth1 ::22/96 ip link set dev veth1 up # in namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq flowlabel 0xbcdef key 2 \ local ::11 remote ::22 ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 ip netns exec at_ns0 ip addr add dev $DEV_NS fc80::100/96 ip netns exec at_ns0 ip link set dev $DEV_NS up # out of namespace ip link add dev $DEV type $TYPE external ip addr add dev $DEV 10.1.1.200/24 ip addr add dev $DEV fc80::200/24 ip link set dev $DEV up } function add_erspan_tunnel { # in namespace if [ "$1" == "v1" ]; then ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq key 2 \ local 172.16.1.100 remote 172.16.1.200 \ erspan_ver 1 erspan 123 else ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq key 2 \ local 172.16.1.100 remote 172.16.1.200 \ erspan_ver 2 erspan_dir egress erspan_hwid 3 fi ip netns exec at_ns0 ip link set dev $DEV_NS up ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 # out of namespace ip link add dev $DEV type $TYPE external ip link set dev $DEV up ip addr add dev $DEV 10.1.1.200/24 } function add_ip6erspan_tunnel { # assign ipv6 address ip netns exec at_ns0 ip addr add ::11/96 dev veth0 ip netns exec at_ns0 ip link set dev veth0 up ip addr add dev veth1 ::22/96 ip link set dev veth1 up # in namespace if [ "$1" == "v1" ]; then ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq key 2 \ local ::11 remote ::22 \ erspan_ver 1 erspan 123 else ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq key 2 \ local ::11 remote ::22 \ erspan_ver 2 erspan_dir egress erspan_hwid 7 fi ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 ip netns exec at_ns0 ip link set dev $DEV_NS up # out of namespace ip link add dev $DEV type $TYPE external ip addr add dev $DEV 10.1.1.200/24 ip link set dev $DEV up } function add_vxlan_tunnel { # Set static ARP entry here because iptables set-mark works # on L3 packet, as a result not applying to ARP packets, # causing errors at get_tunnel_{key/opt}. # in namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE id 2 dstport 4789 gbp remote 172.16.1.200 ip netns exec at_ns0 ip link set dev $DEV_NS address 52:54:00:d9:01:00 up ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 ip netns exec at_ns0 arp -s 10.1.1.200 52:54:00:d9:02:00 ip netns exec at_ns0 iptables -A OUTPUT -j MARK --set-mark 0x800FF # out of namespace ip link add dev $DEV type $TYPE external gbp dstport 4789 ip link set dev $DEV address 52:54:00:d9:02:00 up ip addr add dev $DEV 10.1.1.200/24 arp -s 10.1.1.100 52:54:00:d9:01:00 } function add_geneve_tunnel { # in namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE id 2 dstport 6081 remote 172.16.1.200 ip netns exec at_ns0 ip link set dev $DEV_NS up ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 # out of namespace ip link add dev $DEV type $TYPE dstport 6081 external ip link set dev $DEV up ip addr add dev $DEV 10.1.1.200/24 } function add_ipip_tunnel { # in namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE local 172.16.1.100 remote 172.16.1.200 ip netns exec at_ns0 ip link set dev $DEV_NS up ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 # out of namespace ip link add dev $DEV type $TYPE external ip link set dev $DEV up ip addr add dev $DEV 10.1.1.200/24 } function attach_bpf { DEV=$1 SET_TUNNEL=$2 GET_TUNNEL=$3 tc qdisc add dev $DEV clsact tc filter add dev $DEV egress bpf da obj tcbpf2_kern.o sec $SET_TUNNEL tc filter add dev $DEV ingress bpf da obj tcbpf2_kern.o sec $GET_TUNNEL } function test_gre { TYPE=gretap DEV_NS=gretap00 DEV=gretap11 config_device add_gre_tunnel attach_bpf $DEV gre_set_tunnel gre_get_tunnel ping -c 1 10.1.1.100 ip netns exec at_ns0 ping -c 1 10.1.1.200 cleanup } function test_ip6gre { TYPE=ip6gre DEV_NS=ip6gre00 DEV=ip6gre11 config_device # reuse the ip6gretap function add_ip6gretap_tunnel attach_bpf $DEV ip6gretap_set_tunnel ip6gretap_get_tunnel # underlay ping6 -c 4 ::11 # overlay: ipv4 over ipv6 ip netns exec at_ns0 ping -c 1 10.1.1.200 ping -c 1 10.1.1.100 # overlay: ipv6 over ipv6 ip netns exec at_ns0 ping6 -c 1 fc80::200 cleanup } function test_ip6gretap { TYPE=ip6gretap DEV_NS=ip6gretap00 DEV=ip6gretap11 config_device add_ip6gretap_tunnel attach_bpf $DEV ip6gretap_set_tunnel ip6gretap_get_tunnel # underlay ping6 -c 4 ::11 # overlay: ipv4 over ipv6 ip netns exec at_ns0 ping -i .2 -c 1 10.1.1.200 ping -c 1 10.1.1.100 # overlay: ipv6 over ipv6 ip netns exec at_ns0 ping6 -c 1 fc80::200 cleanup } function test_erspan { TYPE=erspan DEV_NS=erspan00 DEV=erspan11 config_device add_erspan_tunnel $1 attach_bpf $DEV erspan_set_tunnel erspan_get_tunnel ping -c 1 10.1.1.100 ip netns exec at_ns0 ping -c 1 10.1.1.200 cleanup } function test_ip6erspan { TYPE=ip6erspan DEV_NS=ip6erspan00 DEV=ip6erspan11 config_device add_ip6erspan_tunnel $1 attach_bpf $DEV ip4ip6erspan_set_tunnel ip4ip6erspan_get_tunnel ping6 -c 3 ::11 ip netns exec at_ns0 ping -c 1 10.1.1.200 cleanup } function test_vxlan { TYPE=vxlan DEV_NS=vxlan00 DEV=vxlan11 config_device add_vxlan_tunnel attach_bpf $DEV vxlan_set_tunnel vxlan_get_tunnel ping -c 1 10.1.1.100 ip netns exec at_ns0 ping -c 1 10.1.1.200 cleanup } function test_geneve { TYPE=geneve DEV_NS=geneve00 DEV=geneve11 config_device add_geneve_tunnel attach_bpf $DEV geneve_set_tunnel geneve_get_tunnel ping -c 1 10.1.1.100 ip netns exec at_ns0 ping -c 1 10.1.1.200 cleanup } function test_ipip { TYPE=ipip DEV_NS=ipip00 DEV=ipip11 config_device tcpdump -nei veth1 & cat /sys/kernel/debug/tracing/trace_pipe & add_ipip_tunnel ethtool -K veth1 gso off gro off rx off tx off ip link set dev veth1 mtu 1500 attach_bpf $DEV ipip_set_tunnel ipip_get_tunnel ping -c 1 10.1.1.100 ip netns exec at_ns0 ping -c 1 10.1.1.200 ip netns exec at_ns0 iperf -sD -p 5200 > /dev/null sleep 0.2 iperf -c 10.1.1.100 -n 5k -p 5200 cleanup } function cleanup { set +ex pkill iperf ip netns delete at_ns0 ip link del veth1 ip link del ipip11 ip link del gretap11 ip link del ip6gre11 ip link del ip6gretap11 ip link del vxlan11 ip link del geneve11 ip link del erspan11 ip link del ip6erspan11 pkill tcpdump pkill cat set -ex } trap cleanup 0 2 3 6 9 cleanup echo "Testing GRE tunnel..." test_gre echo "Testing IP6GRE tunnel..." test_ip6gre echo "Testing IP6GRETAP tunnel..." test_ip6gretap echo "Testing ERSPAN tunnel..." test_erspan v1 test_erspan v2 echo "Testing IP6ERSPAN tunnel..." test_ip6erspan v1 test_ip6erspan v2 echo "Testing VXLAN tunnel..." test_vxlan echo "Testing GENEVE tunnel..." test_geneve echo "Testing IPIP tunnel..." test_ipip echo "*** PASS ***"