1#!/bin/bash 2# Connects 6 network namespaces through veths. 3# Each NS may have different IPv6 global scope addresses : 4# NS1 ---- NS2 ---- NS3 ---- NS4 ---- NS5 ---- NS6 5# fb00::1 fd00::1 fd00::2 fd00::3 fb00::6 6# fc42::1 fd00::4 7# 8# All IPv6 packets going to fb00::/16 through NS2 will be encapsulated in a 9# IPv6 header with a Segment Routing Header, with segments : 10# fd00::1 -> fd00::2 -> fd00::3 -> fd00::4 11# 12# 3 fd00::/16 IPv6 addresses are binded to seg6local End.BPF actions : 13# - fd00::1 : add a TLV, change the flags and apply a End.X action to fc42::1 14# - fd00::2 : remove the TLV, change the flags, add a tag 15# - fd00::3 : apply an End.T action to fd00::4, through routing table 117 16# 17# fd00::4 is a simple Segment Routing node decapsulating the inner IPv6 packet. 18# Each End.BPF action will validate the operations applied on the SRH by the 19# previous BPF program in the chain, otherwise the packet is dropped. 20# 21# An UDP datagram is sent from fb00::1 to fb00::6. The test succeeds if this 22# datagram can be read on NS6 when binding to fb00::6. 23 24TMP_FILE="/tmp/selftest_lwt_seg6local.txt" 25 26cleanup() 27{ 28 if [ "$?" = "0" ]; then 29 echo "selftests: test_lwt_seg6local [PASS]"; 30 else 31 echo "selftests: test_lwt_seg6local [FAILED]"; 32 fi 33 34 set +e 35 ip netns del ns1 2> /dev/null 36 ip netns del ns2 2> /dev/null 37 ip netns del ns3 2> /dev/null 38 ip netns del ns4 2> /dev/null 39 ip netns del ns5 2> /dev/null 40 ip netns del ns6 2> /dev/null 41 rm -f $TMP_FILE 42} 43 44set -e 45 46ip netns add ns1 47ip netns add ns2 48ip netns add ns3 49ip netns add ns4 50ip netns add ns5 51ip netns add ns6 52 53trap cleanup 0 2 3 6 9 54 55ip link add veth1 type veth peer name veth2 56ip link add veth3 type veth peer name veth4 57ip link add veth5 type veth peer name veth6 58ip link add veth7 type veth peer name veth8 59ip link add veth9 type veth peer name veth10 60 61ip link set veth1 netns ns1 62ip link set veth2 netns ns2 63ip link set veth3 netns ns2 64ip link set veth4 netns ns3 65ip link set veth5 netns ns3 66ip link set veth6 netns ns4 67ip link set veth7 netns ns4 68ip link set veth8 netns ns5 69ip link set veth9 netns ns5 70ip link set veth10 netns ns6 71 72ip netns exec ns1 ip link set dev veth1 up 73ip netns exec ns2 ip link set dev veth2 up 74ip netns exec ns2 ip link set dev veth3 up 75ip netns exec ns3 ip link set dev veth4 up 76ip netns exec ns3 ip link set dev veth5 up 77ip netns exec ns4 ip link set dev veth6 up 78ip netns exec ns4 ip link set dev veth7 up 79ip netns exec ns5 ip link set dev veth8 up 80ip netns exec ns5 ip link set dev veth9 up 81ip netns exec ns6 ip link set dev veth10 up 82ip netns exec ns6 ip link set dev lo up 83 84# All link scope addresses and routes required between veths 85ip netns exec ns1 ip -6 addr add fb00::12/16 dev veth1 scope link 86ip netns exec ns1 ip -6 route add fb00::21 dev veth1 scope link 87ip netns exec ns2 ip -6 addr add fb00::21/16 dev veth2 scope link 88ip netns exec ns2 ip -6 addr add fb00::34/16 dev veth3 scope link 89ip netns exec ns2 ip -6 route add fb00::43 dev veth3 scope link 90ip netns exec ns3 ip -6 route add fb00::65 dev veth5 scope link 91ip netns exec ns3 ip -6 addr add fb00::43/16 dev veth4 scope link 92ip netns exec ns3 ip -6 addr add fb00::56/16 dev veth5 scope link 93ip netns exec ns4 ip -6 addr add fb00::65/16 dev veth6 scope link 94ip netns exec ns4 ip -6 addr add fb00::78/16 dev veth7 scope link 95ip netns exec ns4 ip -6 route add fb00::87 dev veth7 scope link 96ip netns exec ns5 ip -6 addr add fb00::87/16 dev veth8 scope link 97ip netns exec ns5 ip -6 addr add fb00::910/16 dev veth9 scope link 98ip netns exec ns5 ip -6 route add fb00::109 dev veth9 scope link 99ip netns exec ns5 ip -6 route add fb00::109 table 117 dev veth9 scope link 100ip netns exec ns6 ip -6 addr add fb00::109/16 dev veth10 scope link 101 102ip netns exec ns1 ip -6 addr add fb00::1/16 dev lo 103ip netns exec ns1 ip -6 route add fb00::6 dev veth1 via fb00::21 104 105ip netns exec ns2 ip -6 route add fb00::6 encap bpf in obj test_lwt_seg6local.o sec encap_srh dev veth2 106ip netns exec ns2 ip -6 route add fd00::1 dev veth3 via fb00::43 scope link 107 108ip netns exec ns3 ip -6 route add fc42::1 dev veth5 via fb00::65 109ip netns exec ns3 ip -6 route add fd00::1 encap seg6local action End.BPF obj test_lwt_seg6local.o sec add_egr_x dev veth4 110 111ip netns exec ns4 ip -6 route add fd00::2 encap seg6local action End.BPF obj test_lwt_seg6local.o sec pop_egr dev veth6 112ip netns exec ns4 ip -6 addr add fc42::1 dev lo 113ip netns exec ns4 ip -6 route add fd00::3 dev veth7 via fb00::87 114 115ip netns exec ns5 ip -6 route add fd00::4 table 117 dev veth9 via fb00::109 116ip netns exec ns5 ip -6 route add fd00::3 encap seg6local action End.BPF obj test_lwt_seg6local.o sec inspect_t dev veth8 117 118ip netns exec ns6 ip -6 addr add fb00::6/16 dev lo 119ip netns exec ns6 ip -6 addr add fd00::4/16 dev lo 120 121ip netns exec ns1 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null 122ip netns exec ns2 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null 123ip netns exec ns3 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null 124ip netns exec ns4 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null 125ip netns exec ns5 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null 126 127ip netns exec ns6 sysctl net.ipv6.conf.all.seg6_enabled=1 > /dev/null 128ip netns exec ns6 sysctl net.ipv6.conf.lo.seg6_enabled=1 > /dev/null 129ip netns exec ns6 sysctl net.ipv6.conf.veth10.seg6_enabled=1 > /dev/null 130 131ip netns exec ns6 nc -l -6 -u -d 7330 > $TMP_FILE & 132ip netns exec ns1 bash -c "echo 'foobar' | nc -w0 -6 -u -p 2121 -s fb00::1 fb00::6 7330" 133sleep 5 # wait enough time to ensure the UDP datagram arrived to the last segment 134kill -INT $! 135 136if [[ $(< $TMP_FILE) != "foobar" ]]; then 137 exit 1 138fi 139 140exit 0 141