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