name : test_lwt_seg6local.sh #!/bin/bash # Connects 6 network namespaces through veths. # Each NS may have different IPv6 global scope addresses : # NS1 ---- NS2 ---- NS3 ---- NS4 ---- NS5 ---- NS6 # fb00::1 fd00::1 fd00::2 fd00::3 fb00::6 # fc42::1 fd00::4 # # All IPv6 packets going to fb00::/16 through NS2 will be encapsulated in a # IPv6 header with a Segment Routing Header, with segments : # fd00::1 -> fd00::2 -> fd00::3 -> fd00::4 # # 3 fd00::/16 IPv6 addresses are binded to seg6local End.BPF actions : # - fd00::1 : add a TLV, change the flags and apply a End.X action to fc42::1 # - fd00::2 : remove the TLV, change the flags, add a tag # - fd00::3 : apply an End.T action to fd00::4, through routing table 117 # # fd00::4 is a simple Segment Routing node decapsulating the inner IPv6 packet. # Each End.BPF action will validate the operations applied on the SRH by the # previous BPF program in the chain, otherwise the packet is dropped. # # An UDP datagram is sent from fb00::1 to fb00::6. The test succeeds if this # datagram can be read on NS6 when binding to fb00::6. # Kselftest framework requirement - SKIP code is 4. ksft_skip=4 BPF_FILE="test_lwt_seg6local.bpf.o" readonly NS1="ns1-$(mktemp -u XXXXXX)" readonly NS2="ns2-$(mktemp -u XXXXXX)" readonly NS3="ns3-$(mktemp -u XXXXXX)" readonly NS4="ns4-$(mktemp -u XXXXXX)" readonly NS5="ns5-$(mktemp -u XXXXXX)" readonly NS6="ns6-$(mktemp -u XXXXXX)" msg="skip all tests:" if [ $UID != 0 ]; then echo $msg please run this as root >&2 exit $ksft_skip fi TMP_FILE="/tmp/selftest_lwt_seg6local.txt" cleanup() { if [ "$?" = "0" ]; then echo "selftests: test_lwt_seg6local [PASS]"; else echo "selftests: test_lwt_seg6local [FAILED]"; fi set +e ip netns del ${NS1} 2> /dev/null ip netns del ${NS2} 2> /dev/null ip netns del ${NS3} 2> /dev/null ip netns del ${NS4} 2> /dev/null ip netns del ${NS5} 2> /dev/null ip netns del ${NS6} 2> /dev/null rm -f $TMP_FILE } set -e ip netns add ${NS1} ip netns add ${NS2} ip netns add ${NS3} ip netns add ${NS4} ip netns add ${NS5} ip netns add ${NS6} trap cleanup 0 2 3 6 9 ip link add veth1 type veth peer name veth2 ip link add veth3 type veth peer name veth4 ip link add veth5 type veth peer name veth6 ip link add veth7 type veth peer name veth8 ip link add veth9 type veth peer name veth10 ip link set veth1 netns ${NS1} ip link set veth2 netns ${NS2} ip link set veth3 netns ${NS2} ip link set veth4 netns ${NS3} ip link set veth5 netns ${NS3} ip link set veth6 netns ${NS4} ip link set veth7 netns ${NS4} ip link set veth8 netns ${NS5} ip link set veth9 netns ${NS5} ip link set veth10 netns ${NS6} ip netns exec ${NS1} ip link set dev veth1 up ip netns exec ${NS2} ip link set dev veth2 up ip netns exec ${NS2} ip link set dev veth3 up ip netns exec ${NS3} ip link set dev veth4 up ip netns exec ${NS3} ip link set dev veth5 up ip netns exec ${NS4} ip link set dev veth6 up ip netns exec ${NS4} ip link set dev veth7 up ip netns exec ${NS5} ip link set dev veth8 up ip netns exec ${NS5} ip link set dev veth9 up ip netns exec ${NS6} ip link set dev veth10 up ip netns exec ${NS6} ip link set dev lo up # All link scope addresses and routes required between veths ip netns exec ${NS1} ip -6 addr add fb00::12/16 dev veth1 scope link ip netns exec ${NS1} ip -6 route add fb00::21 dev veth1 scope link ip netns exec ${NS2} ip -6 addr add fb00::21/16 dev veth2 scope link ip netns exec ${NS2} ip -6 addr add fb00::34/16 dev veth3 scope link ip netns exec ${NS2} ip -6 route add fb00::43 dev veth3 scope link ip netns exec ${NS3} ip -6 route add fb00::65 dev veth5 scope link ip netns exec ${NS3} ip -6 addr add fb00::43/16 dev veth4 scope link ip netns exec ${NS3} ip -6 addr add fb00::56/16 dev veth5 scope link ip netns exec ${NS4} ip -6 addr add fb00::65/16 dev veth6 scope link ip netns exec ${NS4} ip -6 addr add fb00::78/16 dev veth7 scope link ip netns exec ${NS4} ip -6 route add fb00::87 dev veth7 scope link ip netns exec ${NS5} ip -6 addr add fb00::87/16 dev veth8 scope link ip netns exec ${NS5} ip -6 addr add fb00::910/16 dev veth9 scope link ip netns exec ${NS5} ip -6 route add fb00::109 dev veth9 scope link ip netns exec ${NS5} ip -6 route add fb00::109 table 117 dev veth9 scope link ip netns exec ${NS6} ip -6 addr add fb00::109/16 dev veth10 scope link ip netns exec ${NS1} ip -6 addr add fb00::1/16 dev lo ip netns exec ${NS1} ip -6 route add fb00::6 dev veth1 via fb00::21 ip netns exec ${NS2} ip -6 route add fb00::6 encap bpf in obj ${BPF_FILE} sec encap_srh dev veth2 ip netns exec ${NS2} ip -6 route add fd00::1 dev veth3 via fb00::43 scope link ip netns exec ${NS3} ip -6 route add fc42::1 dev veth5 via fb00::65 ip netns exec ${NS3} ip -6 route add fd00::1 encap seg6local action End.BPF endpoint obj ${BPF_FILE} sec add_egr_x dev veth4 ip netns exec ${NS4} ip -6 route add fd00::2 encap seg6local action End.BPF endpoint obj ${BPF_FILE} sec pop_egr dev veth6 ip netns exec ${NS4} ip -6 addr add fc42::1 dev lo ip netns exec ${NS4} ip -6 route add fd00::3 dev veth7 via fb00::87 ip netns exec ${NS5} ip -6 route add fd00::4 table 117 dev veth9 via fb00::109 ip netns exec ${NS5} ip -6 route add fd00::3 encap seg6local action End.BPF endpoint obj ${BPF_FILE} sec inspect_t dev veth8 ip netns exec ${NS6} ip -6 addr add fb00::6/16 dev lo ip netns exec ${NS6} ip -6 addr add fd00::4/16 dev lo ip netns exec ${NS1} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null ip netns exec ${NS2} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null ip netns exec ${NS3} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null ip netns exec ${NS4} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null ip netns exec ${NS5} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null ip netns exec ${NS6} sysctl net.ipv6.conf.all.seg6_enabled=1 > /dev/null ip netns exec ${NS6} sysctl net.ipv6.conf.lo.seg6_enabled=1 > /dev/null ip netns exec ${NS6} sysctl net.ipv6.conf.veth10.seg6_enabled=1 > /dev/null ip netns exec ${NS6} nc -l -6 -u -d 7330 > $TMP_FILE & ip netns exec ${NS1} bash -c "echo 'foobar' | nc -w0 -6 -u -p 2121 -s fb00::1 fb00::6 7330" sleep 5 # wait enough time to ensure the UDP datagram arrived to the last segment kill -TERM $! if [[ $(< $TMP_FILE) != "foobar" ]]; then exit 1 fi exit 0