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 24# Kselftest framework requirement - SKIP code is 4. 25ksft_skip=4 26BPF_FILE="test_lwt_seg6local.bpf.o" 27readonly NS1="ns1-$(mktemp -u XXXXXX)" 28readonly NS2="ns2-$(mktemp -u XXXXXX)" 29readonly NS3="ns3-$(mktemp -u XXXXXX)" 30readonly NS4="ns4-$(mktemp -u XXXXXX)" 31readonly NS5="ns5-$(mktemp -u XXXXXX)" 32readonly NS6="ns6-$(mktemp -u XXXXXX)" 33 34msg="skip all tests:" 35if [ $UID != 0 ]; then 36 echo $msg please run this as root >&2 37 exit $ksft_skip 38fi 39 40TMP_FILE="/tmp/selftest_lwt_seg6local.txt" 41 42cleanup() 43{ 44 if [ "$?" = "0" ]; then 45 echo "selftests: test_lwt_seg6local [PASS]"; 46 else 47 echo "selftests: test_lwt_seg6local [FAILED]"; 48 fi 49 50 set +e 51 ip netns del ${NS1} 2> /dev/null 52 ip netns del ${NS2} 2> /dev/null 53 ip netns del ${NS3} 2> /dev/null 54 ip netns del ${NS4} 2> /dev/null 55 ip netns del ${NS5} 2> /dev/null 56 ip netns del ${NS6} 2> /dev/null 57 rm -f $TMP_FILE 58} 59 60set -e 61 62ip netns add ${NS1} 63ip netns add ${NS2} 64ip netns add ${NS3} 65ip netns add ${NS4} 66ip netns add ${NS5} 67ip netns add ${NS6} 68 69trap cleanup 0 2 3 6 9 70 71ip link add veth1 type veth peer name veth2 72ip link add veth3 type veth peer name veth4 73ip link add veth5 type veth peer name veth6 74ip link add veth7 type veth peer name veth8 75ip link add veth9 type veth peer name veth10 76 77ip link set veth1 netns ${NS1} 78ip link set veth2 netns ${NS2} 79ip link set veth3 netns ${NS2} 80ip link set veth4 netns ${NS3} 81ip link set veth5 netns ${NS3} 82ip link set veth6 netns ${NS4} 83ip link set veth7 netns ${NS4} 84ip link set veth8 netns ${NS5} 85ip link set veth9 netns ${NS5} 86ip link set veth10 netns ${NS6} 87 88ip netns exec ${NS1} ip link set dev veth1 up 89ip netns exec ${NS2} ip link set dev veth2 up 90ip netns exec ${NS2} ip link set dev veth3 up 91ip netns exec ${NS3} ip link set dev veth4 up 92ip netns exec ${NS3} ip link set dev veth5 up 93ip netns exec ${NS4} ip link set dev veth6 up 94ip netns exec ${NS4} ip link set dev veth7 up 95ip netns exec ${NS5} ip link set dev veth8 up 96ip netns exec ${NS5} ip link set dev veth9 up 97ip netns exec ${NS6} ip link set dev veth10 up 98ip netns exec ${NS6} ip link set dev lo up 99 100# All link scope addresses and routes required between veths 101ip netns exec ${NS1} ip -6 addr add fb00::12/16 dev veth1 scope link 102ip netns exec ${NS1} ip -6 route add fb00::21 dev veth1 scope link 103ip netns exec ${NS2} ip -6 addr add fb00::21/16 dev veth2 scope link 104ip netns exec ${NS2} ip -6 addr add fb00::34/16 dev veth3 scope link 105ip netns exec ${NS2} ip -6 route add fb00::43 dev veth3 scope link 106ip netns exec ${NS3} ip -6 route add fb00::65 dev veth5 scope link 107ip netns exec ${NS3} ip -6 addr add fb00::43/16 dev veth4 scope link 108ip netns exec ${NS3} ip -6 addr add fb00::56/16 dev veth5 scope link 109ip netns exec ${NS4} ip -6 addr add fb00::65/16 dev veth6 scope link 110ip netns exec ${NS4} ip -6 addr add fb00::78/16 dev veth7 scope link 111ip netns exec ${NS4} ip -6 route add fb00::87 dev veth7 scope link 112ip netns exec ${NS5} ip -6 addr add fb00::87/16 dev veth8 scope link 113ip netns exec ${NS5} ip -6 addr add fb00::910/16 dev veth9 scope link 114ip netns exec ${NS5} ip -6 route add fb00::109 dev veth9 scope link 115ip netns exec ${NS5} ip -6 route add fb00::109 table 117 dev veth9 scope link 116ip netns exec ${NS6} ip -6 addr add fb00::109/16 dev veth10 scope link 117 118ip netns exec ${NS1} ip -6 addr add fb00::1/16 dev lo 119ip netns exec ${NS1} ip -6 route add fb00::6 dev veth1 via fb00::21 120 121ip netns exec ${NS2} ip -6 route add fb00::6 encap bpf in obj ${BPF_FILE} sec encap_srh dev veth2 122ip netns exec ${NS2} ip -6 route add fd00::1 dev veth3 via fb00::43 scope link 123 124ip netns exec ${NS3} ip -6 route add fc42::1 dev veth5 via fb00::65 125ip netns exec ${NS3} ip -6 route add fd00::1 encap seg6local action End.BPF endpoint obj ${BPF_FILE} sec add_egr_x dev veth4 126 127ip netns exec ${NS4} ip -6 route add fd00::2 encap seg6local action End.BPF endpoint obj ${BPF_FILE} sec pop_egr dev veth6 128ip netns exec ${NS4} ip -6 addr add fc42::1 dev lo 129ip netns exec ${NS4} ip -6 route add fd00::3 dev veth7 via fb00::87 130 131ip netns exec ${NS5} ip -6 route add fd00::4 table 117 dev veth9 via fb00::109 132ip netns exec ${NS5} ip -6 route add fd00::3 encap seg6local action End.BPF endpoint obj ${BPF_FILE} sec inspect_t dev veth8 133 134ip netns exec ${NS6} ip -6 addr add fb00::6/16 dev lo 135ip netns exec ${NS6} ip -6 addr add fd00::4/16 dev lo 136 137ip netns exec ${NS1} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null 138ip netns exec ${NS2} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null 139ip netns exec ${NS3} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null 140ip netns exec ${NS4} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null 141ip netns exec ${NS5} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null 142 143ip netns exec ${NS6} sysctl net.ipv6.conf.all.seg6_enabled=1 > /dev/null 144ip netns exec ${NS6} sysctl net.ipv6.conf.lo.seg6_enabled=1 > /dev/null 145ip netns exec ${NS6} sysctl net.ipv6.conf.veth10.seg6_enabled=1 > /dev/null 146 147ip netns exec ${NS6} nc -l -6 -u -d 7330 > $TMP_FILE & 148ip netns exec ${NS1} bash -c "echo 'foobar' | nc -w0 -6 -u -p 2121 -s fb00::1 fb00::6 7330" 149sleep 5 # wait enough time to ensure the UDP datagram arrived to the last segment 150kill -TERM $! 151 152if [[ $(< $TMP_FILE) != "foobar" ]]; then 153 exit 1 154fi 155 156exit 0 157